"Experiment, Modelling and Simulation of High-Temperature Ground Thermal Storage Systems"

《高温地面蓄热系统的实验、建模与仿真》

• 批准号: 227676-2012
• 负责人: Leong, WeyHerng
• 金额: $ 1.46万
• 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: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=570298
• 关键词: Experiment; Modelling; Simulation; Temperature; Ground

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 and improves the system's efficiency. Thus, a ground thermal energy store, 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, since 2007 80% of residential space heating needs for 52 houses have been met by retrieving solar energy stored during the summer season from a high-temperature (up to 80°C) ground thermal energy store. The equivalent reduction is approximately 72 GJ of heating energy (or 1920 m3 of natural gas) and 3.6 tonnes of greenhouse gas emissions per home, per year. In order to widely use such technology in Canada or 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, 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, 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 30 to 50 years or longer. To meet this objective, experiment and modelling work will be required to validate or model the theory of coupled heat and moisture movement in soils, soil thermal conductivity and ground heat exchangers. Once developed and validated, all the models will be implemented into a computer program for modelling the heat exchange between a ground heat exchanger system and the ground. The software should be able to predict and remedy any potential problems, such as dry out of ground, which would degrade the thermal performance of the system.

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的需求和供应之间的不匹配，并提高系统的效率。这是一家地面热能商店，很容易在建筑物，后院或前院下购买，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利用率。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。自2007年以来，通过检索夏季在高温（高达80°C）地面热能商店中存储的太阳能，已经满足了52座房屋的住宅空间供暖需求。同等的减少约为每年每年一户家庭的加热能量（或1920平方米的天然气）和3.6吨温室气体排放。为了在加拿大或世界上广泛使用此类技术，需要一种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，功能强大的计算机软件工具。该软件程序将有能力模拟地面耦合热和水运动的复杂性质，从而可以实现地面热量储能系统的适当尺寸 - 也就是说，它将能够符合需求（例如，对建筑物的加热）和供应（例如，来自Solar collectors of Solar from Solar of Solar of Solar of Solar of Solar of Solar of Solar of Solar of Solar of Solar of Thermal of Thermal of Thermal of Theral Encerial）均超过30至50至50年或更长的时间。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中的热量和水分运动，土壤热导率和地面热交换器的耦合理论。一旦开发和验证，所有模型将被实施到计算机程序中，以建模地面热交换系统与地面之间的热量交换。该软件应该能够预测和记住任何潜在的问题，例如Dry Indrack，这会降低系统的热性能。