Features
Fishing without gas-guzzling
Towards fuel-efficient fishing for food and nutritional security
by Prof. Oscar Amarasinghe
Chancellor / Ocean University of Sri Lanka
President / Sri Lanka Forum or Small-Scale Fisheries (SLFSSF)
The present economic crisis, and the associated energy crisis, has mightily affected the fisheries sector, reducing the number of boats at sea, dwindling market supply, soaring fish prices, all affecting food and nutritional security of the people in Sri Lanka. Being a highly fuel-dependent sector, there is a pressing need for the sector to find means of economising on fuel and continue to provide the most important animal protein to the people-the Fish. Yet, the tale of woe of fishers is that they have neither the physical nor economic access to fuel. Time has come to reexamine ways and means of improving the fuel use efficiency of fishing vessels to meet the escalating food crisis which has already hit the people with a monstrous force.
Fishing is among the most energy-intensive food production methods globally, and the world’s fishing fleet consumes about 1.2% of the total global fuel consumption, which is equal to 0.67 liters of fuel for each Kg of live fish and shellfish landed. In dealing with the issue of fuel efficiency in fisheries, it is imperative to understand how energy is expended in a fishing vessel and what means are available to minimize energy use without any fall in the efficiency of productive operations and incomes. It may also be necessary to understand how energy use can be influenced by the operator, boat-builder or mechanic, etc. Apart from improving the fuel use efficiency, various parties have been trying out the potential for using alternative sources of energy such as solar energy and wind energy. Yet, information on various issues related to the use of solar energy, use of sail on motorised fishing boats, the diverse benefits and costs associated with such innovations, etc., are quite scanty.
Giving due consideration to the significance and urgency of the above issues, the SLFSSF (Sri Lanka Forum for Small Scale Fisheries) organized an Interactive Platform on “Improving the energy use efficiency in fisheries” on the 17th of June. This platform brought together representatives of the Department of Fisheries, Boat yards, companies producing solar power, marine engineers (consultants), civil society organisations, fishing leaders, academics and researchers of the SLFSSF, etc., who deliberated on their knowledge and experience on various aspects of energy use in fishing crafts and proposed certain recommendations by common consent. The aim of this article is to bring to the attention of the fisheries authoritie, and other relevant parties, the results of these deliberations, which have very important implications for immediate, short term and medium-term measures that could be adopted to improve the fuel use efficiency in fishing vessels.

Immediate measures
It was disclosed that only about a third of the energy generated in a fishing vessel is expended to turn the propeller, while the rest is used to overcome resistance offered by a diversity of factors: 27 percent to overcome wave resistance; 18 percent to overcome skin friction; 17 percent to overcome resistance from the wake and propeller wash against the hull; and three percent to overcome air resistance. This information has already been published by the FAO more than 20 years ago, although they have evaded the attention of fisheries authorities in this country. In overcoming resistance offered by waves, hull fouling, wake and propeller wash, etc. ,a number of strategies were proposed to be adopted, which included, slowing down (reduced speeds), proper hull designs, regular engine and hull maintenance, capacity building of operators, etc.
Speed was one factor which was discussed in detail. Generally, fishers like high speeds and try to reach fishing grounds within the shortest time possible which will allow them to return with the catch early. Thus engines are often run to maximum speeds. It was revealed during deliberations that fuel requirement for increase in speed increases exponentially. To double the speed, one needs more than double the amount of fuel. Thus a reduction of the speed appears to be an effective means of increasing fuel use efficiency. It has been estimated that 10-20 reduction in the speed could result in 35-61 percent savings on fuel. The FAO has published optimum speed recommendations for fishing vessels by the size of the vessel, and they were accepted as applicable to fishing vessels used in the country at present. For example, for boats with a waterline length of 13 meters, the recommended speeds are 8.5 and 7.1, knots, respectively for long thin vessels and short fat vessels. The same for boats with a 15 m water line are 9.1 and 7.7 knots, respectively. Of course, reduced speeds will result in longer fishing trips, short periods of shore leave and/or lesser number of trips annually. The use of fish finding devices, information from NARA to locate fish resources and reach fishing grounds early, etc., are important strategies to surmount loss of fishing time and to reduce the amount of fuel required to travel one nautical mile. Fuel wastage could also be minimized by reducing the number of zero catch days which is quite common in fisheries, often emerging from resource and weather uncertainties. In this regard, too, information on fishing grounds and weather would be of great value. Such information show where and what opportunities exist to improve energy use efficiency.
Another short term measure would be to minimize energy expended to cope with hull fouling. There is accumulation of marine growth on the boat hull, resulting in reduced speed. It was revealed that about 18 – 20 percent of the energy is expended to counteract hull fouling. The most appropriate measure to reduce resistance offered by hull fouling is to clean the hull below the water line during servicing, at regular intervals. It was also noted that by using a good anti-foul paint, which could last three year or longer, would be beneficial, economically, even if the investment cost could be high.
A complain that is often heard is that there is too much of fishing pressure in Sri Lanka’s waters, especially in inshore waters: too many crafts and too many fishers. In such a context, the higher the fishing pressure, the higher would be the fuel consumption and degradation of resources, and the lesser would be the income per fisher. Therefore, there is an urgent need to stop building small crafts such as fiber glass boats with outboard engine. One way to do this is to put an end to the process of registration of such crafts.
Short-term measures
Recognising the fact that search for resource areas is a huge cost, needing the multiday boat crews to carry 12-14,000 liters of diesel on board, improvement of fish finding information, provided by the National Aquatic Resources Research and Development Agency, by strengthening the relevant process, would be of utmost importance in reducing search costs. Moreover, low-cost fish detection systems available in the world, could be tried out locally to find out their applicability and adoptability. If this is found to be successful, fuel savings from this measure would be colossal.
Quite often, due to the high cost of cleaning boat hulls below water line, boat owners ignore anti-fouling measures. Facilities for treating hull fouling, such as cranes and hoists, could be installed at harbours and they can be offered to fishers at concessionary rates.
Another short term measure could be the training and capacity building of boat crew on fuel efficient fishing and maintenance of engine and hull. The Department of Fisheries could organise awareness building workshops for boat owners and crews, with the participation of other experts, on the subject of energy use efficiency in boats. It was also stated that potential fuel savings gained from running at recommended speeds (reduced speeds) could be worked out and shown to the fishers.
Use of wind energy to charge batteries was also discussed. It was shown that this technology is already in use in some multiday boats, revealing the potential of adopting this technology with suitable modifications. Thus, installation of devices that use wind energy was recommended, which was also shown to be a good safety measure against the risk of engine failure which will make the GPS non-functional.
Medium and long term measures
An array of medium term measures were proposed, which included, solar panels for boats, sail assisted propulsion, engine and hull maintenance and two-day fishing trips for fiber glass boats with outboard motor.
The potential for using solar panels on fishing boats was discussed in detail. Experts, on the production and installation of solar panel systems, showed that the area required to provide a fishing boat with the requisite energy was too large, compared to the surface available for solar panel installation on boats. This was true for both small and large fishing boats in use. Moreover, the decks of multiday boats are tightly packed with extra fuel barrels, fishing gear, various sticks and poles and space is hardly available to accommodate installation of solar panels. However, there might exist some possibility of using a hybrid system (solar + fuel) in boats, but this needs to be researched.
Sail- assisted propulsion could also be a possibility. Of course, the use of sail as auxiliary propulsion, could result in very large fuel savings (up to 80 percent with small vessels on longer journeys) but the applicability of sail to motorized fishing is, however by no means universally popular. Sri Lanka too does not possess much experience in using sail-assisted propulsion in motor boats, although there is some scanty evidence of using such hybrid systems. Undoubtedly, sails fixed on motorised crafts, with inboard or outboard motor, are likely to tamper with fishing operations on the deck, while requiring additional ballast for balancing of the crafts. This warrants further research on this technology. Very specific circumstances are required for this to be a viable technology, for motorised fishing crafts in the country, in terms of weather conditions, the design of the fishing vessel as well as crew attitude and knowledge. Sailing puts additional requirements on the vessel, with respect to stability and deck layout, and sails are usually only a viable technology for use on vessels that have been specifically designed for sailing. Smaller fishing vessels may require the addition of further ballast or an external ballast keel (a weighted horizontal keel under the hull) to improve both stability and sailing performance across or towards the wind. What possibility exists in fixing sails on small FRP boats or offshore crafts is not known.
The deliberations further focused on the possibility of expanding the size and operating distance of the fleet of small fiberglass boats with outboard motors, which account for 40 percent of the fishing fleet or 24,000 crafts, operating up to a maximum distance of 24 nautical miles (up to the edge of the contiguous zone), engaged in one-day fishing trips. Following requests often made by small scale fishers and the need to improve the fuel use efficiency of fishing crafts, the possibility of modifying this craft by introducing a fish hold for icing of the catch and providing moderate accommodation facilities for crew, to allow for a two-day fishing trip was also discussed. The boat yards recognized the existence of this possibility but were of the view that further research on boat designs, and applicability and adoptability of this technology was required with the participation of technical and fisheries experts and fishing communities.
At a previous meeting on a similar subject, fuel inefficiencies arising from having about 5,000 multiday crafts with individual ownership was also noted. It was disclosed that such an organizational structure could change over to a cluster-based fleet, each cluster having its ‘mother ship’ to fish while the remaining boats could transfer the catch to the shore, minimising fuel costs to a great extent.

Expert panels and research
One of the momentous turns at deliberations was the emphasis laid on the need for an assemblage of technical experts, including engineers from boat yards, scientists (academics, researchers, consultants) fisher leaders, etc,. to guide technological change. This was especially important to design small boats with facilities to engage in two-day fishing trips, use of solar panels to assist using hybrid type of energy systems, sail assisted propulsion, use of wind power to charge batteries, etc. It was recognised that, endowed with a large array of educated and qualified experts, technicians, etc., what is required is for the Department of Fisheries to take the initiative in organizing such platforms and use them gainfully towards achieving the above goals.
Paradigm shift towards change
It is a pity that, endowed with a large conglomerate of intelligentsia and an array of experts in a large diversity of technical disciplines, the fisheries authorities still appear to work, confining themselves to their own little shells. Even with hesitation, it needs to be reminded that, by joining hand with others you will know what you know and what you don’t know, which is considered the true knowledge. It is said that, knowledge is power and knowledge shared is power squared. Therefore, it is strongly advised that the Department of Fisheries forms a Technical Expert Team, consisting of experts on marine engineering, boat design (architecture) and construction, solar power producing and system installation, sail assisted propulsion, and also of fishing leaders and boat owners, all of whom could guide them in boat designs and construction, fuel usage, minimizing energy requirements, search for alternative energy sources, etc.
As the theoretical physicist, David Bohm stated, it is the ability to perceive and think differently that will take us a long way rather than the knowledge gained.
Features
The Ramadan War
A Strategic Assessment of a Conflict Still Unresolved
The Unites States of America and its ally, Israel attacked Iran on 28 February, or the 10th day of the month of Ramadan. More than a month of intense fighting has passed since, and the Ramadan War has settled into a grinding, attritional struggle that defies early declarations of victory. Despite sustained U.S. and Israeli air and naval bombardment, Iran remains standing, and continues to strike back with a level of resilience that has surprised many observers. The conflict has evolved into a contest of endurance, adaptation, and strategic innovation, with each side attempting to impose costs the other cannot bear.
Iran’s response to the overwhelming airpower of its adversaries has been both simple and devastatingly effective: saturate enemy defences with swarms of inexpensive drones and older ballistic missiles, forcing them to expend costly interceptors and reveal radar positions, and then follow up with salvos of its most advanced precisionguided missiles. This layered approach has inflicted severe physical damage on Israel and has shaken its national morale. The country has endured repeated missile barrages from Iran and rocket fire from Hezbollah, straining its airdefence network and pushing its civilian population to the limits of endurance.
The United States, meanwhile, has been forced to evacuate or reduce operations at several bases in the Gulf region due to persistent Iranian drone and missile attacks. For both the U.S. and Israel, the war has become a test of strategic credibility. For Iran, by contrast, victory is defined not by territorial gains or decisive battlefield outcomes, but by survival, and by continuing to impose costs on its adversaries.
The central strategic objective for the U.S. has now crystallised: reopening the Strait of Hormuz to secure global energy flows. Ironically, the Strait was open before the war began; it is the conflict itself that has rendered it effectively closed. Air and naval power alone cannot achieve this objective. The geography of the Strait, combined with Iran’s layered defences, means that any lasting solution will require ground forces, a reality that carries enormous risks.
U.S. Strategic Options
The United States faces five broad operational options, each with significant drawbacks.
1. Seizing Kharg Island
Kharg Island handles roughly 90% of Iran’s oil exports, making it an attractive target. However, it lies only a short distance from the Iranian mainland, where entrenched Iranian forces maintain dense networks of missile batteries, drones, artillery, and coastal defences. Any attempt to seize Kharg would require first neutralising or capturing the adjacent coastline, a costly amphibious and ground operation.
Even if successful, this would not reopen the Strait of Hormuz. It would merely deprive Iran of export capacity, which is not the primary U.S. objective. At least ostensibly not; there are those who argue that the U.S. simply wants to take over Iran’s petroleum (see below).
2. Forcing the Strait of Hormuz by Naval Power
Sending U.S. naval forces directly through the Strait is theoretically possible but operationally hazardous. Iran has mined all but a narrow channel hugging its own shoreline. That channel is covered by overlapping fields of antiship missiles, drones, artillery, and coastal radar. Clearing the mines would require prolonged operations under fire. Attempting to push through without clearing them would risk catastrophic losses.
3. Capturing Qeshm, Hengam, Larak, and Hormuz Islands
These islands dominate the Iranian side of the Strait and host radar, missile, and drone installations. Capturing them would degrade Iran’s ability to close the Strait, but the islands are heavily fortified, and the surrounding waters are mined. Amphibious assaults against defended islands are among the most difficult military operations. Even success would not guarantee the Strait’s longterm security unless the mainland launch sites were also neutralised.
4. Invading Southern Iraq and Crossing into Khuzestan
This option would involve U.S. forces advancing through southern Iraq, crossing the Shatt alArab waterway, and pushing into Iran’s Khuzestan province — home to most of Iran’s oilfields. The terrain is difficult: marshes, waterways, and narrow approaches. Iranian forces occupy the high ground overlooking the plains.
While this route would allow Saudi armoured forces to participate, it would also expose U.S. and allied logistics to attacks by Iraqi Shia militias, who have already demonstrated their willingness to target U.S. assets. The political and operational risks are immense.
5. Capturing Chabahar and Advancing Along the Coast
The most strategically promising — though still costly — option is seizing the port of Chabahar in southeastern Iran and advancing roughly 660 kilometres along the coast toward Bandar Abbas. This approach offers several advantages:
· Distance from Iran’s core population centres complicates Iranian logistics.
· Chabahar’s deepwater port (16m draught)
would provide a valuable logistics hub.
· U.S. carriers could remain at safer standoff distances
, supporting operations without entering the Strait.
· The coastal route allows naval gunfire and missile support
to assist advancing ground forces.
· Local Baluchi insurgents
could provide intelligence and limited support.
· Capturing Bandar Abbas would
outflank Iran’s island defences and effectively reopen the Strait.
This option is likely to form the backbone of any U.S. ground campaign, potentially supplemented by diversionary attacks by regional partners to stretch Iranian defences.
The Limits of U.S. Superiority
The United States retains overwhelming superiority in naval power and manned airpower. But whether this advantage translates into dominance in unmanned systems or ground combat is far from certain.
The 2003 invasion of Iraq is often cited as a model of U.S. military prowess, but the comparison is misleading. Iraq in 2003 had been crippled by a decade of sanctions. Its forces lacked modern mines, antitank missiles, and effective air defences. Tank crews had little training; some could not hit targets at pointblank range. RPG teams were similarly unprepared. The U.S. enjoyed numerical superiority in the theatre and total control of the air, allowing it to isolate Iraqi units and prevent reinforcement.
Even under those favourable conditions, Iraqi forces managed to delay the U.S. advance. At one point, forward U.S. units nearly ran out of ammunition and supplies, forcing the diversion of forces intended for the assault on Baghdad to secure the lines of communication.
Iran is not Iraq in 2003. Its armed forces and industrial base have adapted to nearly half a century of sanctions. It produces its own drones, missiles, artillery, and armoured vehicles. It has built extensive underground facilities, hardened command posts, and redundant communication networks.
Moreover, the battlefield itself has changed. The RussoUkrainian war demonstrated that deep armoured penetrations – once the hallmark of U.S. doctrine – are now extremely vulnerable to drones, loitering munitions, and precision artillery. The result has been a return to attritional warfare reminiscent of the First World War, with front lines stabilising into trench networks.
Yet, as in the First World War, stalemate has been broken not by massed assaults but by small, highly trained teams infiltrating thinly held lines, identifying targets, and guiding drones and artillery onto enemy positions deep in the rear. Iran has studied these lessons closely.
Mosaic Defence and Transformational Warfare
Iran’s military doctrine has evolved significantly over the past two decades. Its “mosaic defence” decentralises command and control, ensuring that even if senior leadership is targeted, local units can continue operating autonomously. This structure proved resilient during the initial waves of U.S. and Israeli strikes.
Iran has also absorbed lessons from U.S. “shock and awe” operations. The botched U.S. invasion of Grenada in 1983 exposed weaknesses in joint operations, prompting the development of “effectsbased operations,” “rapid dominance” and the broader concept of “transformational warfare.” These doctrines (better known colloquially as “Shock and Awe”), influenced by Liddell Hart and Sun Tzu, emphasised simultaneous strikes on strategic targets to paralyse the enemy’s decisionmaking.
While the U.S. struggled to apply these concepts effectively in Iraq and Iran, Tehran has adapted them for asymmetric use. Its drone and missile campaigns have targeted not only military assets but also economic infrastructure and psychological resilience. Israel’s economy and morale have been severely tested, and the United States finds itself entangled in a conflict that offers no easy exit.
Iran has also pursued a broader strategic objective: undermining the petrodollar system that underpins U.S. financial dominance. By disrupting energy flows and encouraging alternative trading mechanisms, Iran seeks to weaken the economic foundations of U.S. power.
Will the USA Achieve Its War Aims?
The United States’ core objective appears to be securing control over global energy flows by reopening the Strait of Hormuz and limiting China’s access to Middle Eastern oil before it can transition to alternative energy sources. Whether this objective is achievable remains uncertain.
A ground campaign would be long, costly, and politically fraught. Iran’s defences are deep, layered, and adaptive. Its drone and missile capabilities have already demonstrated their ability to impose significant costs on technologically superior adversaries. Regional allies are cautious, and global support for a prolonged conflict is limited.
The United States retains overwhelming military power, but power alone does not guarantee strategic success. Iran’s strategy is simple: survive, adapt, and continue imposing costs. In asymmetric conflicts, survival itself can constitute victory.
In Frank Herbert’s Dune, the protagonist, Paul Muad’dib says “he who can destroy a thing, controls a thing.” This is the essence of Iranian strategy – they have a stranglehold on petroleum supply, and can destroy the world economy. Trump has had to loosen sanctions on both Iran’s and Russia’s oil, simply to prevent economic collapse.
The Ramadan War has already reshaped regional dynamics. Whether it reshapes global power structures will depend on how the next phase unfolds, and whether the United States is willing to pay the price required to achieve its aims.
by Vinod Moonesinghe
Features
Nayanandaya:A literary autopsy of Sri Lanka’s Middle Class
“Nayanandaya,” meaning the enchantment of indebtedness, is Surath de Mel’s latest novel. True to his reputation as a maximalist writer, de Mel traverses the labyrinth of middle-class struggles; poverty, unemployment, the quest for education, through a father’s fragile dreams. The novel unfolds around Mahela, his son, his friendships, and the fragile relationships that keep him tethered to life.
“Happiness is not a destination; it is a journey. There are no shortcuts to it. At some point, the path you thought was right will be wrong. You have to make sacrifices for it.”
These words, uttered by the protagonist Mahela to his ten-year-old son, is the silent mantra of every middle-class parent. A common urban middle-class father’s yearning for his child to climb the ladder he himself could not ascend.
A Socio-Political Mirror
Sri Lanka’s middle class remains trapped in paradox. They are educated but underemployed, salaried but indebted, socially respected yet politically invisible. Structural inequalities, economic volatility and populist politics inclusively contribute to keep them “forever middle”.
Through protagonist Mahela, who is sometimes a graphic designer, sometimes a vendor and always a failure Surath de Mel sketches the deficiencies of an education system that does not nurture skills of the students. Sri Lanka boasts about high literacy rates, yet the economy cannot absorb the thousands of graduates produced into meaningful work. Underemployment becomes the inheritance of the middle class. With political connections often the stories can be transformed. De Mel pens it in dark humour to expose these truths:
“Some notorious writer once sneered in a newspaper, ‘Give your ass to the minister, and you’ll earn the right to keep it on a bigger chair.’ Countless people waiting in ministers’ offices, pressing
their backsides to seats, carrying the weight of their own lives.”
Childhood Trauma and Its Echoes
Surath de Mel frequently weaves psychoanalysis into his fiction. In Nayanandaya, he captures the lingering shadows of childhood trauma. Mahela, scarred by a loveless and fractured youth, suffers phobic anxiety and depression, apparently with a personality disorder as an adult. His confession at the psychologist reveals it out:
“Childhood? I didn’t have one. I was fifteen when I was born.”
Here, Mahela marks his true birth not at infancy, but at the death of his parents. This statement itself reveals the childhood trauma the protagonist had gone through and the reader can attribute his subsequent psychological struggles as the cause of it.
From a Lacanian perspective, trauma is not just something that happens to a child; it is a deep break in how the child understands the world, themselves, and others. Some experiences are too painful to be put into words. Lacan calls this the Real — what cannot be fully spoken or explained. This pain does not disappear but returns later in life as anxiety, fear, or obsessive compulsive disorder.
This trauma disturbs the child’s sense of self and their place in society. When language fails to make sense of loss, the mind creates fantasies to survive. These fantasies quietly shape adult desires, relationships, and choices.
In Nayanandaya, childhood trauma of the protagonist does not stay buried — it lives on, shaping the adulthood in unseen ways. In the narrative, Mahela’s struggles are not just personal failures but the result of a past that was never given words.
Tears of Fathers – Forgotten in Sri Lankan Literature
Sri Lankan literature has long been attentive to suffering — especially rural poverty, social injustice, and the silent endurance of women and single mothers. Countless novels, poems, and songs have given voice to maternal sacrifice, female resilience, and women’s oppression.
Yet, within this rich narratives, the quiet grief of the urban middle-class father remains mostly unseen. Rarely does fiction pause to examine the emotional lives of men who shoulder responsibility without language for their pain. These masculine tears are private, swallowed by routinely and masked by humour or silence. Definitely never granted literary space.
In Nayanandaya, Surath de Mel breaks this silence. Through Mahela, he lends voice to these overlooked men — fathers whose love is expressed through sacrifice rather than speech. However, de Mel does not romanticise the tears. Rather he humanises them. He allows their vulnerabilities, anxieties, and quiet despair to surface with honesty and compassion. In doing so, Nayanandaya fills a striking gap in Sri Lankan literature, reminding us that fathers, too, carry invisible wounds.
Literary value
With Nayanandaya, Surath de Mel reaches a new pinnacle in his literary craft. His language is dense yet lyrical, enriched with similes, metaphors, irony, and a full range of literary tools deployed with confidence and control.
One of the novel’s most touching narrative choices is the personification of Mahela’s son’s soft toy, Wonie. Through personified Wonie, de Mel captures the two most touching incidents in the entire novel . This simply reveals the author’s artistic maturity, transforming a simple object into a powerful emotional conduit that anchors the novel’s tenderness amidst its despair.
At a deeper symbolic level, Mahela himself can be read as more than an individual character, but a metaphor for Sri Lanka — a nation struggling under economic hardship, clinging to impractical dreams, witnessing the migration of its people, and drifting towards a slow, painful exhaustion. His personal failures could mirror the broader decay of social and economic structures. This symbolic reading lends Nayanandaya a haunting national resonance.
Today, many write and many publish, but only a few transform language into literature that lingers in the reader’s mind long after the final page. Surath de Mel belongs to that rare few. In a literary landscape crowded with voices, he remains devoted to art rather than popularity or trend. As a scholar of Sinhala language and literature, de Mel writes with intellectual depth, dark humour, and deep human empathy.
In conclusion, Nayanandaya is not merely a story; it is social commentary, psychoanalytic reflection, and tragic poetry woven into richly textured prose. With this novel — a masterful interlacing of love, debt, and fragile dreams — Surath de Mel engraves a distinctly Dostoevskian signature into Sinhala literature.
Reviewed by Dr. Charuni Kohombange
Features
Domestic Energy Saving
Around 40 percent of the annual energy we use is consumed in domestic activities. Energy is costly, and supply is not unlimited. Unfortunately, we realize the importance of energy – saving only during the time of a crisis.
If you adopt readily affordable energy-saving strategies, you will cut down your living expenditure substantially, relieving the energy burden of the nation. Here are some tips.
Cooking:
Cooking consumes a good portion of domestic energy demand and common practices, and negligence leads to 30 – 40 percent wastage. A simple experiment revealed that the energy expenditure in boiling an egg with the usual unnecessary excess water in an open pan is nearly 50 percent higher than boiling in a closed lid pan with the minimal amount of water. In an open pan, a large quantity of heat is lost via convection currents and expulsion of water vapor, carrying excessive amounts of heat energy (latent heat of vaporisation). Still, most of us boil potatoes for prolonged intervals of time in open receptacles, failing to realise that it is faster and more efficient to boil potatoes or any other food material in a closed pan. About 30 – 40 percent of domestic cooking energy requirements can be cut down by cooking in closed-lid pans. Furthermore, food cooked in closed pans is healthier because of less mixing with air that causes food oxidation. Fat oxidation generates toxic substances. In a closed- lid utensil (not tightly closed), food is covered with a blanket of water vapor at a positive pressure, preventing entry of air and therefore food oxidation.
Overcooking is another bad habit that not only wastes energy but also degrades the nutritional value of food.
Electric kettle:
For making morning or evening tea or preparing tea to serve a visitor. Do not pour an unnecessarily large quantity of water into the electric kettle. Note that the energy needed to make 10 cups of tea is ten times that of one cup.
Electric Ovens:
Avoid the use of electric ovens as far as possible. Remember that foods cooked at higher temperatures are generally unhealthy, and even carcinogens are formed when food is fried at higher temperatures in an oven. If ever you need to bake something in an oven, limit the number of times you open the door. Use smaller ovens adequate for the purpose and not larger ones just for fashion.
Refrigerators:
Refrigerators consume lots of energy. Do not use over-capacity refrigerators just for fashion. Every time you open the fridge, more electricity is used to reset the cooling temperature. Plan your access to the appliance accordingly. Check whether the doors are properly secured and there are no leakages. Keep the fridge in a cooler location, not hit by direct sunlight and away from warmer places in the kitchen. Remember that turning off the fridge frequently will not save energy, instead it draws more energy.
Use of gas burners:
Do not use oversized utensils. Keep the lid closed as far as possible to prevent the escape of heat. Remember that excessive amounts of heat energy are carried away by a large surface-area conducting utensil. Do not open the gas vent to allow the flame to flash outside the vessel. A flame not impinging on the pan would not heat it, and gas is wasted. Ensure that the flame is blue. Frequently check whether gas vents are clogged with rust and carbon. Frequently, cooking material in the pan drops into the gas vents, and salt there corrodes the gas vents. Cleaning and washing would be necessary. Do not prolong cooking, taking time to prepare ingredients and adding them to the pan intermittently. Add ingredients at once and before switching the burner. If the preparation of a dish is prolonged to slow the cooking, use earthenware pots rather than metallic ones. An earthenware pot, being thermally less conducting retain heat.
Firewood for cooking:
Do not attempt to eliminate the use of firewood in cooking. If you are living in a village area, the exclusive use of LPG gas is an unnecessary expenditure. Large smoke-free, efficient oven designs are now available. If you are compelled to use gas, keep the option of firewood ovens, especially for prolonged cooking. Admittedly, there are locations, especially in cities, where the use of firewood is unsuited.
Hot water showers:
Before installing hot water showers, reconsider whether they are really necessary in a hot tropical climate. Go for solar water heaters, although the installation cost is high. Instant water heaters consume much less electricity compared to geysers with water tanks. Now, cheap and safe instant water heaters are available.
Lighting:
Arrange and design your residence to optimise daytime illumination until late evening. If you are constructing a new house, take this issue into account. Use LED lamps, which provide the same illumination for 85 percent less energy. In study rooms and areas that require prolonged illumination, paint the walls white. Angle – poised LED lamps with very low voltage are available. Use them for reading and studies. Routinely clean the surfaces of all lamps. Dust deposition cuts off light.
Air conditioning and ventilation:
Air conditioning consumes prohibitively large quantities of electrical energy. You can avoid air conditioning by optimising ventilation. The principle is to have air entry points (windows) in the house near the ground level and exit points (vents or windows) near the roof. Ground level is cooler, and the region near the roof is warmer. Thus, a cool air current enters the house near the ground level and hot air is drawn by the vents near the roof. The region near the ground can be rendered cooler by planting trees. Architectural designs are available to optimise this effect. You can sense the direction of air motion by holding a thin strip of paper near the windows at the ground and near the roof level. In addition to ceiling fan, install exhaust fans in the upper points of the house to remove hot air and draw cooler air through windows near the ground. Reduce the amount of sunlight hitting the roof by shading with trees. There are techniques for increasing the reflectance of the roof with paints and other designs.
Transportation:
A good portion of your budget is drained by transportation. Irrespective of who you are, use public transport if convenient and available. As much as possible, use the telephone and email to get your things done. If the officers do not comply for no valid reason, complain. Plan your trips to the town to do several things at the same time. Whenever possible, plan to share transport. Buy energy – efficient small vehicles. Routinely examine your vehicle for energy efficiency, i.e. correct tire pressure etc.
Charge electric vehicles off peak hours. Slow charging reduces heat generation in the circuit, reducing energy loss.
Energy is costly and limited in supply. Everything you do consumes energy. Be energy conscious in all your deeds. That attitude will reduce your expenditure, lessen the environmental degradation and financial burden of the nation in importing fuel.
Educating the general public is the most effective way of implementing energy-saving strategies.
By Prof. Kirthi Tennakone
(kenna@yahoo.co.uk)
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Editorial2 days agoSearch for Easter Sunday terror mastermind
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Sports5 days agoSri Lanka’s 1996 World Cup heroes to play exhibition match in Kuala Lumpur

