Comparison of PVT - heat pump systems with reference systems for the energy supply of a single-family house

Solar Energy Advances Pub Date : 2023-01-01 DOI:10.1016/j.seja.2022.100031

Bharat Chhugani , Peter Pärisch , Sebastian Helmling , Federico Giovannetti

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引用次数: 5

Abstract

Photovoltaic - Thermal (PVT) collectors convert solar radiation into useful heat and electricity simultaneously, and with the same PV area, higher solar energy is harvested; hence PVT can be a key technology for the future supply of buildings. The paper compares different heat supply systems for a single-family house, focusing on PVT and heat pump systems. The results show that the PVT - heat pump achieves a higher seasonal performance factor (SPF) than an air-source heat pump. With 30 m² efficient PVT and the heat pump achieves ≈14% higher $S P F_{b S t}$ than air source heat pump (3.82 for PVT - brine water heat pump to 3.29 air-source heat pump). With the same PVT area, $S P F_{b S t}^{(G r i d)}$ including self-consumed PVT electricity by the heat pump system, reaches 4.3 with a demand-based control strategy and 4.97 with a PV-based control strategy. Furthermore, results confirm that by combining PVT collectors and ground-source heat pumps with borehole heat exchangers (BHE), BHEs can be dimensioned 30 to 35% smaller without impacting the system efficiency. The paper also presents the monitoring results of one of the demonstration plants under investigation. The experimental results confirm the good performance of the PVT as a single heat source for heat pumps, with achieved $S P F_{b S t}$ of 3.1 (with 16 m² of the same efficient PVT).

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单户住宅能源供应PVT -热泵系统与参考系统的比较

光伏-热（PVT）收集器将太阳辐射同时转化为有用的热和电，在相同的光伏面积下，可以获得更高的太阳能；因此PVT可以成为未来建筑供应的关键技术。本文对单户住宅的不同供热系统进行了比较，重点介绍了PVT和热泵系统。结果表明，与空气源热泵相比，PVT热泵具有更高的季节性能因子（SPF）。凭借30 m²的高效PVT和热泵，SPFb比空气源热泵高出≈14%（PVT-盐水热泵为3.82，空气源热泵为3.29）。在相同的PVT面积下，采用基于需求的控制策略，包括热泵系统自耗PVT电力在内的SPFbSt（电网）达到4.3，采用基于光伏的控制策略达到4.97。此外，结果证实，通过将PVT收集器和地源热泵与钻孔热交换器（BHE）相结合，BHE的尺寸可以减小30%至35%，而不会影响系统效率。本文还介绍了正在调查的一个示范工厂的监测结果。实验结果证实了PVT作为热泵的单一热源的良好性能，实现了3.1的SPFbSt（具有16 m²的相同有效PVT）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Solar Energy Advances

CiteScore

4.00

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0.00%

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