%0 Conference Paper
%K distributed energy resources (der)
%A Yongwen Yang
%A Weijun Gao
%A Yingjun Ruan
%A Ji Xuan
%A Nan Zhou
%A Chris Marnay
%B International Symposium on Sustainable Development of the Asian City Environment (SDACE) 2005
%C Xi'an, China 
%D 2005
%I LBNL
%T Optimal Model of Distributed Energy System by Using GAMS and Case Study
%2 LBNL-61117
%8 11/2005
%X <p>This paper adopts optimal model which used GAMS to develop methods and tools for conducting an integrated assessment of DER system. Three cases were studied. Energy-saving, environmental and economic efficiency were evaluated. The results of the simulation can be summarized as follows:</p><ol><li>For the current system, optimal operating time is about 4,132 hours per year and from 8 am to 22 pm every day.</li><li>It is economical when electricity price increases or gas price decreases.</li><li>According to the load function of system, energy-saving, environmental and economic efficiency will have a maximum value at optimal operating time.</li><li>Compared with exhaust heat efficiency, power generation efficiency has more influence to the economic efficiency and CO<sub>2</sub> reduction when the total efficiency is fixed.</li></ol>