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J Environ Manage. 2017 Nov 1;202(Pt 1):21-28. doi: 10.1016/j.jenvman.2017.07.019. Epub 2017 Jul 14.

Effects of the distribution density of a biomass combined heat and power plant network on heat utilisation efficiency in village-town systems.

Author information

1
School of Architecture, Harbin Institute of Technology, 150001, China. Electronic address: 29598757@qq.com.
2
School of Architecture, Harbin Institute of Technology, 150001, China; School of Architecture, University of Sheffield, Sheffield S10 2TN, UK. Electronic address: j.kang@sheffield.ac.uk.

Abstract

The building of biomass combined heat and power (CHP) plants is an effective means of developing biomass energy because they can satisfy demands for winter heating and electricity consumption. The purpose of this study was to analyse the effect of the distribution density of a biomass CHP plant network on heat utilisation efficiency in a village-town system. The distribution density is determined based on the heat transmission threshold, and the heat utilisation efficiency is determined based on the heat demand distribution, heat output efficiency, and heat transmission loss. The objective of this study was to ascertain the optimal value for the heat transmission threshold using a multi-scheme comparison based on an analysis of these factors. To this end, a model of a biomass CHP plant network was built using geographic information system tools to simulate and generate three planning schemes with different heat transmission thresholds (6, 8, and 10 km) according to the heat demand distribution. The heat utilisation efficiencies of these planning schemes were then compared by calculating the gross power, heat output efficiency, and heat transmission loss of the biomass CHP plant for each scenario. This multi-scheme comparison yielded the following results: when the heat transmission threshold was low, the distribution density of the biomass CHP plant network was high and the biomass CHP plants tended to be relatively small. In contrast, when the heat transmission threshold was high, the distribution density of the network was low and the biomass CHP plants tended to be relatively large. When the heat transmission threshold was 8 km, the distribution density of the biomass CHP plant network was optimised for efficient heat utilisation. To promote the development of renewable energy sources, a planning scheme for a biomass CHP plant network that maximises heat utilisation efficiency can be obtained using the optimal heat transmission threshold and the nonlinearity coefficient for local roads.

KEYWORDS:

Biomass CHP plant; Distribution density; Fujin; Heat utilisation efficiency; Village–town system

PMID:
28715678
DOI:
10.1016/j.jenvman.2017.07.019
[Indexed for MEDLINE]

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