Evaluation on the Viability of Combined Heat and Power with Different Distributed Generation Technologies for Various Bindings in Japan

Authors: Yingjun Ruan, Qingrong Liu, Weiguo Zhou, Toshiyuki Watanabe

Abstract:

This paper has examined the energy consumption characteristics in six different buildings including apartments, offices, commercial buildings, hospitals, hotels and educational facilities. Then 5-hectare (50000m2) development site for respective building-s type has been assumed as case study to evaluate the introduction effect of Combined Heat and Power (CHP). All kinds of CHP systems with different distributed generation technologies including Gas Turbine (GT), Gas Engine (GE), Diesel Engine (DE), Solid Oxide Fuel Cell (SOFC) and Polymer Electrolyte Fuel Cell (PEFC), have been simulated by using HEATMAP, CHP system analysis software. And their primary energy utilization efficiency, energy saving ratio and CO2 reduction ratio have evaluated and compared respectively. The results can be summarized as follows: Various buildings have their special heat to power ratio characteristics. Matching the heat to power ratio demanded from an individual building with that supplied from a CHP system is very important. It is necessary to select a reasonable distributed generation technologies according to the load characteristics of various buildings. Distributed generation technologies with high energy generating efficiency and low heat to power ratio, like SOFC and PEFC is more reasonable selection for Building Combined Heat and Power (BCHP). CHP system is an attractive option for hotels, hospitals and apartments in Japan. The users can achieve high energy saving and environmental benefit by introducing a CHP systems. In others buildings, especially like commercial buildings and offices, the introduction of CHP system is unreasonable.

Keywords: Combined heat and power, distributed generation technologies, heat-tao-power ratio, energy saving ratio, CO2 reduction ratio

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1082143

References:

[1] Japan cogeneration center: http:www.cgc-japan.com
[2] Ministry of economy, "Trade and industry, Energy in Japan: Agency for natural resources and energy", 2005.5.
[3] Yingjun RUAN, Weijun GAO, et al: "Investigation on the Situation of Combined Heating and Power System in Japan", Journal of Asian Architecture & Building Engineering, Vol.4 No.1, pp.245-251, 2005.5.
[4] Ojima lab: Consumption unit for electricity and heating, cooling and hot water, Waseda University, 1995.6.
[5] Nishita, etc: Investigation on energy consumption in Kyushu, Kyushu Sangyo University, 1997.
[6] Washington State University: HEATMAP Manual, Washington State University, 2002.4.
[7] David BONILLA: "A survey on the performance of, and plant manger satisfaction with, cogeneration in the Japanese manufacturing sector", Second International Symposium on Distributed Generation, Stockholm, Sweden, pp.21-35, 2002.10.
[8] Yingjun RUAN, Weijun GAO, Optimization of Co-generation System for Housing Complex---- Housing Complex-s Scale and System-s Operating Mode, J. Environment. Eng. AIJ, No592, pp15-22, June 2005
[9] Weijun GAO, et al: "Evaluation of the energy and environmental performance by introducing a district energy system----Summer field study at Kitakyushu Science and Research Park", Journal of Asian Architecture & Building Engineering, Vol.2 No.1, pp.237-242, 2003.5.