Supply-demand matching analysis of solar energy systems integrated with ASHP utilization in residential buildings with various time scale

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2025-02-14 DOI:10.1016/j.csite.2025.105859

Min Chen , Sijia Qiao

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引用次数: 0

Abstract

The optimization of the matching relationship between solar energy supply and building energy demand is crucial for enhancing solar energy utilization in buildings. In this study, models of solar photothermal integrated heat pump (PT-ASHP) and solar photovoltaic integrated heat pump (PV-ASHP) systems were established, with a single air source heat pump (ASHP-only) system as a benchmark, based on their implementation in a six-story residential building located in Wuhan. Energy supply-demand matching analysis was conducted at three different time scales using indicators such as On-site energy fraction and On-site energy matching, to evaluate the influence of climate conditions on the thermal and electrical efficiency of the solar energy system. Furthermore, economic and environmental comparisons were made among PT-ASHP, PV-ASHP, and ASHP-only systems. The results showed that the PV-ASHP system had excellent performance with a coefficient of performance of 3.38 and achieved the lowest annual operating cost. Additionally, both PT-ASHP and PV-ASHP systems reduced annual operating costs by 4936.96 CNY and 6980 CNY respectively compared to the ASHP-only system. The PV-ASHP system also exhibited a higher primary energy saving ratio of 22 %, while the PT-ASHP system reduced electricity purchased from the grid resulting in better carbon emissions reduction up to 38.66 tons.

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.