Document Type : Scientific - Research
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Abstract
A least – cost technology selection and inter-fuel subsituation is investigated to propose a 25 year – comprehensive energy efficiency plan for the building and industry sectors in the country. An integrated energy network is provided to model the energy flow from final energy consumptions to energy services. All Active and passive systems in both sectors are considered in the modeling. The long-term energy services demand including: cooling, lighting, electro motive force, steam, compressed air and other energy services is forecasted. The selected technologies in the building energy efficiency plan are as follows: the direct fire absorption systems for cooling and the gas fired systems for heating in the regions where the natural gas grid is penetrated, the insulated walls and the double glass windows in both existing and under-construction buildings, the high- efficient home applances and the high- efficient lighting such as fluorescent lamps and CFLs. This plan results in a 54% saving in building energy consumption cost. In addition, 15% reduction in investment cost is achieved as a result of the reduction of heating and cooling capacities. The industry energy efficiency plan advises to apply economizer, steam trap, air to fuel ratio regulator, air pre-heater, hot water recovery system, industrial combined heat & power, high efficient electric motors, motor controller drives in the cases for which the load profile is considerably variable, reciprocating compressors for the air flows less than 1000 liter per second, centrifugal compressors for the air flows more than 1000 liter per second, absorption chillers especially that of the direct fire ones. These energy efficiency measures could reduce the industry energy consumption by 11/8%. This will result in the prevention of 198 million tons of CO2, 370 thousands tons of Nox and one million ton of SO2
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