Abstract
The present study deals with the economic and environmental assessment of energy conservation in residential buildings. In this approach, the heating and cooling loads of a typical residential building in Tehran with micro gas turbine units have been considered. This 8000 m2 area building possesses 10 floors with 4 units per floor. Five distinguished scenarios, wall insulation, roof insulation, shading, triple glazing and all of the four energy conversation methods have been proposed concerning the decrease in the energy usage. Each of the energy conservation methods was studied separately in four former scenarios and all of these methods were investigated simultaneously in the fifth latter scenario. To achieve the heating, cooling and electrical loads, a number of 30 kW combined heat and power (CHP) micro gas turbine units have been taken into consideration without energy conversation methods. The results show that the best scenario concerning the minimum value of energy loss is that for which the mean heating and cooling loads were 514.58 and 519.08 kW, respectively. Also the number of CHP micro gas turbine units reduces from 30 to 11 and also the total electricity cost decrease from 0.32 to 0.16 US$/kWh with consideration social cost of air pollution.
Highlights
In the last decade, related to energy factors and ecological problems, electric demand and financial raised worldwide
Followings are the specific contribution of this paper in the subject matter area: Five different scenarios have been proposed to energy saving and based on these scenarios, number of micro gas turbine units is calculated and it shows by using each scenario what percent of energy usage is reduced and its effect on cost of electricity with respect to social cost of air pollution is considered
In which CE, cost of initial investment (CI), CO, CF, costs of air pollution (CA) are the cost of electricity, the cost associated with the initial investment, the cost associated with the operation and maintenance, the cost associated with the fuel consumption and the externalized social cost of air pollution, respectively
Summary
In the last decade, related to energy factors and ecological problems, electric demand and financial raised worldwide. The use of internal combustion engines, micro gas turbines or fuel cells for on-site combined heat and power plant (CHP) in residential building, has been studied by several by authors of this paper [5,6,7,8]. Followings are the specific contribution of this paper in the subject matter area: Five different scenarios have been proposed to energy saving (heating and cooling loads of the building) and based on these scenarios, number of micro gas turbine units is calculated and it shows by using each scenario what percent of energy usage is reduced and its effect on cost of electricity with respect to social cost of air pollution is considered. 25 mm Stucco + 203 mm concrete block + 152.4 mm mineral fiber insulation + 16 mm gypsum board
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