THE ECONOMY OF ENERGY EFFECIENT BUILDINGS; AN INDIAN PERSPECTIVE
- ENERGY USE IN BUILDINGS
- ENERGY-USE PATTERNS IN EXISTING BUILDINGS
- An air-conditioner will work lesser and consume lesser electricity if the condenser is in a relatively cool place. Therefore, as far as possible, condenser unit should be placed in a shady location of the building. A unit working in the shade draws on as much as 10 percent less electricity than the similar one operating in the sun.
- A room air-conditioner that is too large for the area it is supposed to cool will perform less efficiently and less effectively than a smaller, properly sized unit because room units perform better if they run for relatively long periods of time than if they are continually switching off and on. A more constant room temperature is maintained and excess humidity is removed if the air conditioners are run for longer times.
- Moreover, the thermostat should not be set at a colder setting than normal when the air-conditioner is switched on as it will not cool the home any faster and would consume more energy by excessive cooling.
|Cost benefit analysis of CFL v/s Compact Florescent Lamps|
|Comparison||Incandescent Lamps||Compact Florescent Lamps|
|Lamp Life (Hours)||750||10000|
|Cost per kWh(residential) $||0.08||0.08|
|Cost per bulb ($)||0.4||8|
|Total life cycle cost||69.2||24|
Solar radiation is abundant in India and should be utilized wherever possible for water heating. The technology is well established and it can easily be fitted to existing and new buildings. Adding a solar collector and a large storage tank (for cloudy days) can reduce electricity consumption for water heating (by 40 to 90%) thereby making great economic sense. The basic requirement is shadow free space facing south @110 Sqft per KW. One KW system produces 4 to 6 units of electricity per day depending on sunshine and costs around 6500$ depending upon system configuration . The cost of installing a 100 liter warming capacity solar panel is 375$- 500$.
- India's energy intensive infrastructure growth coincides with an era of ever increasing energy prices, and our energy security policies need to include implementing energy efficiency techniques in a big way. Some of the key barriers to the implementation of economically feasible energy efficiency measures in buildings are related to the costs and the associated risks of the project preparation stage.
- The Indian government is the largest consumer of electricity and since the exchequer directly pays the energy bills, efficiency has been at a very low priority. Even though Bureau of energy efficiency has come up with the Energy Conservation Building Code 2006, implementation has lagged far behind policy. In the public sector, only NCR has shown some initiative.
- Private sector buildings are increasingly aware of the life cycle costing approach and with the recent availability of a parallel LEED-INDIA rating system for Green Buildings, a lot of action and activity can is expected. The rising energy prices shall further make lifecycle costing more relevant.
 ‘The importance of energy efficiency in buildings’ D.J. Harris, and R. Madomercandy, School of the Built Environment, Heriot-Watt University, EH14 4AS, Edinburgh, UK, http://www.renewingindia.org/
, ,  Indian Urban Building Sector: CDM Potential through Energy Efficiency in Electricity Consumption,Authors: Inderjeet Singh, Axel Michaelowa, 2004, ISSN 1616-4814 .
,  ‘The importance of energy efficiency in buildings’ D.J. Harris, and R. Madomercandy, School of the Built Environment, Heriot-Watt University, EH14 4AS, Edinburgh, UK, http://www.renewingindia.org/
, [9 ] ‘100 Months To Prevent Climate Chaos’-phase out inefficient lighting and cut India’s Carbon emissions by 5%, Greenpeace, http://www.greenpeace.org/
 ‘Solar Power Super Power-- Atanu Dey on India’s Development, http://www.deeshaa.org/2003/
 ‘Say yes to energy-efficient windows’, Bibek Bandyopadhyay, Director, Solar Energy Centre, Ministry of Non-Conventional Energy Sources, Government of India, , http://www.renewingindia.org/
11/22/solar-power-super-power/ , November 22nd, 2003
 ‘Twenty Things You Can Do to Conserve Energy’ -http://www.powerscorecard.
 “Greening Up Your Bottom Line”, Jan Harris and Tom Hengelsberg , www.vtsbdc.org/green.cfm, September 25, 2007 .