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Thermal energy storage technologies for zero carbon housing in the UK

Alghamdi, Jamal 2017. Thermal energy storage technologies for zero carbon housing in the UK. PhD Thesis, Cardiff University.
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Carbon dioxide emissions reduction in the domestic sector in the UK has been increasingly in focus in recent years. Reducing carbon emissions for both operational and embedded building energy will contribute to lowering the overall emission levels. This study aims to investigate the potential contribution of thermal energy storage systems in the UK’s domestic buildings. It also aims to investigate multiple thermal energy storage technologies and their integration into zero-carbon buildings. The research process is conducted in two phases: building energy simulation, and thermal energy storage modelling. Building energy simulation phase investigates energy performance of a single family zero-carbon house located in the UK. This simulation is performed to generate hourly thermal energy performance and calculate potential energy generated from on-site renewable sources. The energy simulation is conducted using HTB2, a computer based tool. The results show a total of 4158 kWh thermal demand while energy generation from renewables reached 6200 kWh. Although the generation exceeds demand, the simulated model requires an extra 1724 kWh of energy supply from the grid. The extra energy supply from the grid is a clear indication of an existing mismatch between energy demand and on-site energy generation. The second phase of this research is conducted by creating a calculation model for the thermal energy storage system. This model is used to determine the performance of different thermal energy storage systems under the operational loads of the zero-carbon house. This step determines the thermal energy storage system contribution in energy demand reduction by shifting load peaks. Furthermore, this step compares the performance between different storage technologies in terms of thermal energy capacity, volumetric storage, storage medium, and annual performance. The final modelling in this study shows performance difference between different TES technologies. While thermochemical energy storage systems achieved higher energy storage capacities with lower volumes than sensible heat storage and PCM systems, all systems were able to reduce demand from grid energy. The annual energy performance of artificial thermochemical sorption materials like zeolite 13X have the ability to achieve zero-grid demand with low requirement of storage volume compared to other material types tested in this study.

Item Type: Thesis (PhD)
Status: Unpublished
Schools: Architecture
Uncontrolled Keywords: Thermal energy storage zero carbon UK housing
Date of First Compliant Deposit: 31 July 2017
Last Modified: 12 Jun 2019 02:05

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