Experimental Study, Modelling and Design of High-Temperature Ground Thermal Energy Storage for Achieving Energy Efficient Building Energy Systems

实现节能建筑能源系统的高温地面热能储存的实验研究、建模和设计

• 批准号: RGPIN-2017-04688
• 负责人: Leong, Wey
• 金额: $ 1.6万
• 依托单位: Ryerson University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=759667
• 关键词: Experimental; Study; Modelling; Design; Temperature

A key technology in energy efficiency and conservation is a thermal energy storage system. It often helps to reduce the mismatch between demand and supply of thermal energy in a system, thereby improving its efficiency. Thus, a ground thermal energy storage (GTES), readily available under a building, backyard or front yard, can play an important role in the future to combat climate change, reduce fossil fuel consumption, and increase renewable energy utilization. The technology can also be extended to communities through district heating systems, as is the case at the one-of-a-kind Drake Landing Solar Community in Okotoks, Alberta. Here, 90% of residential space heating needs for 52 houses have been met since 2007 by retrieving solar energy stored during the summer season from a high-temperature (up to 80C) ground thermal energy store. The equivalent reduction is approximately 39 GJ of heating energy (or 1,050 m3 of natural gas) and 2 tonnes of greenhouse gas emissions per home, per year. In order to widely use such technology in Canada and the world, a reliable tool is required to simulate and design an optimized system in the most energy- and cost-efficient way. The proposed research will develop such a reliable and powerful computer software tool. The software program will have the capability to simulate the complex nature of coupled heat and water movement in the ground, as well as phase change process of phase change materials (PCMs) around ground heat exchangers, such that an appropriate sizing of a ground thermal energy storage system can be achieved - that is, it will be able to match the demand (e.g., heating for buildings) and supply (e.g., solar energy from solar collectors) of thermal energy over a typical service life of 20 years or longer. To meet this objective, experiment and modeling work will be required to validate or model the theory of coupled heat and moisture movement in soils and soil thermal properties. Once developed and validated, all the models will be implemented into a computer program for studying different GTES systems, including ground source heat pump (GSHP), hybrid GSHP, and high-temperature GTES systems.

能源效率和保护方面的关键技术是热能储能系统。它通常有助于减少系统中热能需求和供应之间的不匹配，从而提高其效率。因此，在建筑物，后院或前院容易获得的地面热能存储（GTE）可以在未来发挥重要作用，以应对气候变化，减少化石燃料消耗并增加可再生能源的利用。该技术也可以通过地区供暖系统扩展到社区，就像艾伯塔省Okotoks的独一无二的Drake Landing Solar社区一样。在这里，自2007年以来，有90％的住宅空间供暖需求已满足了52座房屋，从夏季从高温（高达80c）地面热能商店中检索了太阳能。同等的减少约为39 gj的加热能（或1,050平方米的天然气）和每年2吨温室气体排放。为了在加拿大和世界上广泛使用此类技术，需要一个可靠的工具来以最节能和成本效益的方式模拟和设计优化的系统。拟议的研究将开发出如此可靠且功能强大的计算机软件工具。该软件计划将有能力模拟地面中的热量和水流动的复杂性质，以及地面热交换器周围的相变材料（PCM）的相变过程，以便可以实现地面热能存储系统的适当尺寸 - 也就是说，它将能够匹配索尔（例如，供应的溶液和供应者），可以符合20年的能量（例如，供应量），例如，供应量（例如，供应量），供应量，供应量，供应量，供应量的效果。或更长的时间。为了满足这一目标，将需要实验和建模工作来验证或建模土壤和土壤热特性中的热和水分运动理论。一旦开发和验证，所有模型将被实施到计算机程序中，以研究不同的GTES系统，包括地面源热泵（GSHP），混合GSHP和高温GTES系统。