Abstract In the current study the feasibility of using solar-based renewables coupled with thermal energy storage (TES) to displace gas for heating was explored. To assess the feasibility, a numerical model of an air-based encapsulated phase change (EPCM) storage system was developed, validated, optimised, and economically costed. The optimised air-based EPCM system utilised a high and low melting temperature phase change material (PCM) with a sensible storage filler. It was found that a capsule radius of 10 mm and PCM volume of 13% resulted in the lowest cost of discharged thermal energy of $25.55/kWh when storage effectiveness and pumping power was considered. This system was then coupled to solar data for Adelaide, South Australia, to simulate the performance of a 1 MWt heat load over a year. By solving an hourly system generation and demand profile, it was found that a concentrated solar thermal (CST) and photovoltaic (PV) system coupled with TES was able to economically reduce gas consumption by 45–65% when the price of gas was $30/GJ. By employing near-term cost estimates for CST and PV systems coupled with TES, it was found that gas consumption could be reduced by similar amounts with a gas price of $20/GJ.

中文翻译：

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在高温商业/工业应用中使用可再生能源与热能储存相结合以减少天然气消耗

摘要 在当前的研究中，探讨了使用太阳能可再生能源与热能储存 (TES) 相结合来替代天然气供暖的可行性。为了评估可行性，开发、验证、优化和经济成本的基于空气的封装相变 (EPCM) 存储系统的数值模型。优化的基于空气的 EPCM 系统采用高熔点和低熔点相变材料 (PCM) 以及合理的存储填料。结果发现，当考虑存储效率和泵送功率时，10 毫米的胶囊半径和 13% 的 PCM 体积导致排放热能的最低成本为 25.55 美元/千瓦时。然后将该系统与南澳大利亚阿德莱德的太阳能数据相结合，以模拟一年内 1 MWt 热负荷的性能。通过求解每小时系统发电量和需求分布，发现当天然气价格为 30 美元/时，集中式太阳能热 (CST) 和光伏 (PV) 系统与 TES 相结合能够经济地将天然气消耗量减少 45-65%。 GJ。通过对 CST 和光伏系统以及 TES 进行近期成本估算，发现天然气消耗量可以减少类似的数量，天然气价格为 20 美元/吉焦。