严寒地区土壤源热泵供暖问题研究

发布时间：2018-03-14 15:19

本文选题：土壤源热泵　切入点：严寒地区　出处：《吉林建筑大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着经济发展，城市化进程的加快，房地产开发的与日俱增，我国的建筑用能正呈现巨大增长趋势，，建筑耗能所占的比例也越来越高。在过去的几百年里，以化石燃料如煤炭、石油、天然气等为基础的能源体系在社会的发展中起到了极大地推动作用。然而，化石燃料大量广泛的使用导致了地球资源的枯竭，并给环境带来了强大的负担。随着可持续发展理念逐步走进人们的生活，可再生能源如太阳能、生物能、海洋能、水能、风能、地热能等越来越受到人们的重视并在生产和生活中起到越来越重要的影响。现代社会新技术与新工艺的不断产生，可再生能源的开发与利用越来越具有创新性与开拓性，在发挥更大能效的同时如何能对生态环境产生更小的影响是当今社会最关注的话题。而热泵的使用价值在于，将低品位的热能通过电力做功，转变为可被人们所用的高品位热能。地源热泵，已成为现代社会建筑节能领域应用越来越广泛的暖通空调新技术。在1997年，我国政府与美国政府签署了《中美地源热泵利用的合作协议书》，开始了在地源热泵示范项目上的合作。2005年，建设部正式将地源热泵技术列为建设业十项新技术之一，并发布国家标准；2006年，建设部和财政部联合颁布重要文件，为可再生能源建筑应用项目建立专项财政补贴给予支持，引导可再生能源建筑应用技术的发展，促进其工程应用的发展规模和速度，使地源热泵成为层次最高的国家级课题，旨在解决我国目前发展地源热泵存在的共性，基础性技术问题。2007年，地源热泵实际项目在示范城市启动。使得地源热泵技术在我国得到社会各界的逐步认可，实现了从点到面，从示范工程到城市级开展的全面推广。本文从实际工程出发，首先对我国严寒地区（以长春市为例）的三个土壤源热泵既有工程进行了实地调查研究，分析了各工程的系统形式及运行状况，对比了各工程的项目初投资、系统运行费用及与采用常规能源相比年均节约的费用等。然后从土壤源热泵系统的一次能源利用率、经济效益、环境效益几方面分别进行了适用性分析，将土壤源热泵系统供暖与传统的燃煤系统供暖、燃气系统供暖、燃油系统供暖以及电系统供暖进行了比较，分析了各系统所具有的各自的优点及缺点，以及在现实生活和生产中所具有的实用性。最后通过对土壤源热泵地下换热器在工程中的使用形式和特点的分析，总结了土壤源热泵地下换热器的设计原理及方法，用来评估各设计方案的经济性，概括了优化土壤源热泵地下换热器的步骤与设计流程。通过各项分析，综合考虑多方面因素，得出土壤源热泵系统在我国严寒地区具有良好的可行性与明显的发展优势及广阔的发展空间，可以逐步取代常规能源供暖，成为普遍的新型的供暖方式。
[Abstract]:With the development of economy, the acceleration of urbanization and the increasing development of real estate, the building energy consumption in our country is increasing greatly, and the proportion of building energy consumption is also increasing. In the past few hundred years, fossil fuels such as coal have been used. Oil, natural gas and other energy systems have played an important role in the development of society. However, the extensive use of fossil fuels has resulted in the depletion of the earth's resources. With the concept of sustainable development gradually into people's lives, renewable energy such as solar energy, biological energy, ocean energy, water energy, wind energy, Geothermal energy has been paid more and more attention and played an increasingly important role in production and life. With the development of new technology and new technology in modern society, the development and utilization of renewable energy are more and more innovative and pioneering. How to make a smaller impact on the ecological environment while exerting greater energy efficiency is the most concerned topic in the society today. And the use value of heat pump is to do work through electric power with low-grade heat energy. Convert to high grade heat that can be used by people. Ground-source heat pump (GSHP) has become a more and more widely used new HVAC technology in the field of building energy conservation in modern society. In 1997, In 2005, the Ministry of Construction officially listed the ground-source heat pump technology as one of the ten new technologies in the construction industry. In 2006, the Ministry of Construction and the Ministry of Finance jointly issued important documents to support the establishment of special financial subsidies for renewable energy building application projects and to guide the development of renewable energy building application technologies. In order to promote the development scale and speed of its engineering application, ground source heat pump (GSHP) has become the highest level national subject, aiming at solving the common and basic technical problems existing in the current development of ground-source heat pump in China. In 2007, The actual project of ground source heat pump is started in the demonstration city. The technology of ground source heat pump has been gradually approved by all walks of life in our country, which has realized the comprehensive popularization from point to surface, from demonstration project to city level. In this paper, based on the actual project, three existing ground source heat pump projects in severe cold region of China (Changchun City as an example) are investigated on the spot, and the system forms and operation conditions of each project are analyzed. The project initial investment, system operating cost and average annual cost saving compared with conventional energy are compared. Then, the primary energy efficiency and economic benefit of ground-source heat pump system are analyzed. The applicability of ground-source heat pump system is compared with that of traditional coal-fired system, gas system, fuel system and electric system. The advantages and disadvantages of each system are analyzed, as well as the practicability in real life and production. Finally, the application forms and characteristics of ground source heat pump heat exchanger in engineering are analyzed. This paper summarizes the design principle and method of ground source heat pump (GSHP) ground heat exchanger, which is used to evaluate the economy of each design scheme, and summarizes the steps and design flow of optimizing GSHP ground heat exchanger. Through all kinds of analysis and comprehensive consideration of many factors, it is concluded that the ground source heat pump system has good feasibility, obvious development advantage and broad development space in the cold area of our country, and can gradually replace the conventional energy heating. It has become a new type of heating.
【学位授予单位】：吉林建筑大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU832

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