Postgraduate Dissertation


Evaluating the Economic and Environmental Feasibility of Domestic Hot Water and Heating through a Hybrid Photovoltaic Integrated Heat Pump System in UK Homes

Abstract

This paper investigates the economic performance along with the environmental effects for the performance of an integrated hybrid photovoltaic solar- assisted heat pump system to cover the domestic hot water and heating demands in the UK households. The case study building is located in Beckenham, United Kingdom and revolves around a three bedroom semi- detached house with four occupants. The hyping concerns over climate change and energy sustainability poses the must of an efficient and renewable solution starting from the micro level- residential setting. The system thus will be replacing the existing gas fired combi boiler, to be powered with an Air Source Heat Pump (ASHP) used for the DHW and SH needs of the house, which is further powered with the electricity produced by the array of PV panels fit on the east facing roof. The study employs a quantitative analysis approach utilising the energy simulation models along with economic analysis of the ASHP-PV system and the heat pumps are also compared on the basis of various COPs. A respective literature review is conducted to gain the findings suggesting that the hybrid system has the potential of significantly reducing the carbon emissions and the energy consumptions revolving around the DHW and heating of the UK housing stock. Though being an effective alternative to fossil fuel, the use of such systems is limited due to the factors involving initial investments, performance and most importantly the consumer behaviour. The system having a much higher initial investment cost has a lower annual operating cost as compared to the existing gas boiler in the investigated house. The study also showcases that the hybrid ASHP+PV system can reduce the annual CO2 emissions by 1374 kg/year which is cut down to 15% as compared to the conventional boiler for the studied household. The dependence on the main grid is also reduced significantly i.e. the electricity consumption through the grid is cut down to 19% after the implementation of the hybrid system. Finally the study aims to contribute the evolving mass of knowledge on the matters of sustainable energy systems for residential applications. This thus puts forward an eminent understanding for policymakers, industry holders and homeowners who seek transition towards a low carbon and energy efficient housing.



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Authors

Patil, Geetesh

Contributors

Rights Holders: Patil, Geetesh
Supervisors: Salek, Farhad

Oxford Brookes departments

School of Architecture

Degree programme

MSc Sustainable Architecture: Evaluation and Design

Year

2024


© Patil, Geetesh
Published by Oxford Brookes University
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