The missing link in the energy equation
By Dr M. Asif
IN THE present age, the provision of sufficient and affordable energy has become a basic human need. Pakistan is facing one of the worst energy crisis of its history. The gap between demand and supply was growing over the last few years, and this summer it crossed the 2,500MW mark.
With overwhelming energy challenges facing Pakistan, apart from bridging the gap between demand and supply, it has become essential for the country to adopt a meaningful and coherent energy conservation policy to use the available lot of energy more productively.
In the modern world, energy conservation, also referred to as energy conservation and management, is considered crucial to promoting energy sustainability. Energy conservation is the process of decreasing the quantity of energy used while achieving a similar output to deliver financial gain.
Energy conservation also leads to environmental benefits, human comfort and personal and national security. Individuals and organisations that are direct consumers of energy may want to conserve energy in order to reduce costs and promote economic and environmental sustainability. Industrial and commercial users may want to increase efficiency and thus maximise profits.
On a larger scale, energy conservation is being considered as an integral part of national energy policy. In brief, energy conservation reduces energy consumption and energy demand per capita, and thus offsets the growth in energy supply needed to keep up with population increase. This reduces the rise in energy costs, and can reduce the need for new power plants and energy imports.
The reduced energy demand can provide more flexibility in choosing the most preferred methods of energy production. By reducing emissions, energy conservation is an important part of lessening global warming. Energy conservation facilitates the replacement of conventional energy resources with renewable ones.
Energy conservation is often the most economical solution to energy shortages. As a matter of fact, energy conservation measures can be up to four times more economical than producing electricity from conventional systems.
Energy conservation practices find their effectiveness in all sectors — domestic, industrial, transport and commercial. The industrial sector represents production and the processing of goods, including manufacturing, construction, farming, water management and mining.
Energy costs account for a major proportion of the total operational cost for a wide range of industries. In the wake of increasing energy prices, it has become critical for industries to cut down their energy costs in order to succeed in highly competitive local and international markets.
In Pakistan, the industrial sector in general incorporates considerable energy losses thus lowering the level of overall operational productivity. For example, plants and equipment lack proper calibration and maintenance, and production and assembly lines run low on productivity. The industrialist is not aware of the financial losses being incurred as a result of these inefficient practices.
Even the most modern of industries in Pakistan does not have an internal energy auditing and monitoring policy in place which is the key to energy conservation and management. The irony is that the human resource at any level — top to lower management, engineers and technical staff, laymen and other support staff — has neither the vision nor the relevant qualification to realise the essence of energy conservation.
The domestic sector accounts for about 44 per cent of the total energy consumption in Pakistan. It is estimated that 30-40 per cent of the total energy load in the domestic sector goes into space conditioning i.e. cooling in summer and heating in winter.
Other major energy-consuming activities include cooking, heating water and lighting. Manufacturers of home appliances have absolutely no clue about making their products energy-efficient. Consumers are not aware of the fortune home appliances are costing them in terms of running costs which consists primarily of consumed energy cost.
Commercial buildings can greatly increase energy efficiency by implementing thoughtful designs. The commercial sector that normally consists of retail stores, offices, restaurants, schools and other workplaces has energy applications similar to the ones seen in the domestic sector. Space conditioning is again the single biggest consumption area, followed by lighting. Both of these are generally the most wasteful components of commercial energy use.
No rocket science is required to carry out energy conservation. It is simple and viable. It can be accomplished in a number of ways and at various degrees depending upon the nature and size of its application. In its simplest form, it starts absolutely free of cost, for example, switching the lights off when not required and a sensible setting of the thermostat.
At the second level, it could be a low-cost practice, for example, usage of fluorescent lights to cut down the lighting load or shading the south-facing windows and walls in order to reduce the cooling load. At the third level, it could require some investment, for example, incorporation of insulation to control heating and cooling losses, and proper calibration and maintenance of equipment to make them run at an optimal level.
The last and relatively more expensive level could be a major overhauling of the existing system/equipment or even replacement of aging and ill-productive equipment with new and more efficient gear. Examples in this regard include the implementation of a regular maintenance plan for equipment, replacement of single-glazed windows with multi-glazed windows, replacement of conventional boilers with heat recovery ones, and incorporation of heat exchangers to extract energy from the waste heat.
It is important to bear in mind that whatever energy conservation measures are adopted, they should pay themselves back several times over their lifetime.
It has been seen in most developed countries that despite the modern and efficient infrastructure in place, there is still considerable margin for improvement through the implementation of energy conservation and management measures — reports and case studies indicate that in the domestic, industrial and commercial sectors, energy conservation practices can easily save more than 15 per cent of the total energy being consumed.
This being the case with developed states, countries like Pakistan have much greater scope for energy conservation practices. Considering the current electricity and gas prices in the country, energy conservation can definitely save a few hundred rupees over a year even for the smallest domestic consumer connected to the grid.
For large-scale industries employing extensive use of energy, the resulting saving could be in the millions. Subsequent financial relief can thus be reflected in lower operation/production costs, making products and services more competitive in the market.
In conclusion, energy conservation is in the interest of individuals as it results in financial gain. It is also a service to the nation as energy conservation at the macro level can reduce the demand load on the national grid. The less energy we consume the cleaner will be our environment.
The writer is lecturer in renewable energy, Glasgow Caledonian University, UK
Email: dr.m.asif@gmail.com

