Techno-economic analysis of distributed absorption cooling system driven by a district heating system
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ORIGINAL ARTICLE
Techno-economic analysis of distributed absorption cooling system driven by a district heating system Qunli Zhang & Yue Wang & Xinchao Zhang & Mingshuang Wang & Gang Wang
Received: 13 March 2019 / Accepted: 16 September 2020 # Springer Nature B.V. 2020
Abstract The heating requirements for district heating systems decrease sharply during the summer in China, which leads to the heating capacity of these systems remaining idle. To make full use of district heating systems, a novel approach for application of these thermal systems to cooling is proposed in this paper. The proposed system is based on a distributed absorption cooling (DAC) system driven by heat from the combined heat and power system. To investigate its energysaving effects, the energy efficiency of the proposed DAC system was researched using the primary energy saving ratio (FESR) method. To assess the economic feasibility of the proposed system, the equivalent heating price for this DAC system was derived using economic analysis methods. The weight analysis method was used to analyse the factors affecting the energy efficiency of the DAC system. The research results showed that the energy efficiency and the economic feasibility of the proposed DAC system can be improved by increasing the heating-driven cooling efficiency. A new DAC system (IDAC) was then proposed based on integration of DAC with a heat-driven liquid Q. Zhang : Y. Wang : X. Zhang : M. Wang : G. Wang Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing 100044, China Q. Zhang (*) : Y. Wang : X. Zhang : M. Wang : G. Wang Beijing Key Lab of Heating, Gas Supply, Ventilating and Air Conditioning Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China e-mail: [email protected]
desiccant dehumidifier (LDD), and the results show that the new system can increase the heating-driven cooling efficiency. Keywords District heating system . Combined heat and power . Distributed absorption cooling . Liquid desiccant dehumidification
Introduction The number of district heating areas in China is increasing continuously, with the heating sources mainly being coal-fired combined heat and power (CHP) systems (Wang et al. 2010). However, these district heating systems are generally underused during the summer because of reduced heating demand, which is causing increasing concern. Discussions and research have been conducted into the use of the excess heat from these district heating systems in summertime (Powell et al. 2014) to improve the economic revenues of the CHP plants and the associated heating companies. Mohammad Sameti studies the optimization approaches in district heating and cooling thermal network (Sameti and Haghighat 2017). One is a least-annualized-cost mathematical approach based on the mixed integer linear programming (MILP) (Sameti and Haghighat 2019a), and uses a mathematical programming procedure to model the optimal design and planning of a new distri
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