土壤新风换热系统应用研究

发布时间：2018-03-04 07:28

本文选题：地下埋管　切入点：土壤　出处：《西安建筑科技大学》2013年硕士论文　论文类型：学位论文

【摘要】：土壤新风换热系统是利用浅层地表土壤中所蕴藏的冷热量，对室外空气进行冷却和加热的系统。它可以实现对建筑物的供冷和供热，或者用于降低空调系统新风的夏季冷负荷和冬季热负荷；由于其系统简单，运行能耗低，故是一种应用前景广阔的可再生能源利用技术。本文的研究对象是地下埋管土壤新风换热系统，研究的主要目的是为了完成陕西省西安市汉长安城直城门遗址博物馆项目的地下埋管土壤新风换热系统设计。通过研究：本文归纳整理出了湿陷性黄土热物性的计算方法，以及土壤温度分布计算模型；并分析了土壤温度的变化特性，即温度波的衰减和延迟。通过分析空气在地下埋管内与土壤的传热过程，建立了新风流经地下埋管时参数变化计算模型；并借助该模型分析了土壤物性、通风时间、地埋管长度、地埋管埋深、风速（风量）、地埋管管径、进风温度等因素对地下埋管土壤新风换热系统出口空气温度的影响；讨论了该种系统形式在全国应用的可行性。分析研究的结果，为实际工程应用地下埋管土壤新风换热系统提供了参考数据。在理论研究的基础上，本文结合西安地区气象条件和土壤温度分布特点，对汉长安城直城门遗址博物馆项目的土壤新风换热系统进行了设计。从设计条件、系统方案、设计计算等角度给出了地下埋管土壤新风换热系统在建筑中应用的设计方法。最后，利用上述项目的设计数据和预算定额从初投资、运行费用等几方面对地下埋管土壤新风换热系统的经济性进行了分析。
[Abstract]:The soil fresh air heat transfer system is a system for cooling and heating the outdoor air by using the cold heat contained in the shallow surface soil. It can realize the cooling and heating of buildings. Or it can be used to reduce the summer cooling load and winter heat load of fresh air in air conditioning system, because of its simple system and low energy consumption, it is a kind of renewable energy utilization technology with broad application prospect. The research object of this paper is the new wind heat transfer system of underground buried soil. The main purpose of the study is to complete the design of the new wind heat transfer system of buried soil soil for the project of Zhichengmen Museum in Han'an City, Shaanxi Province. Through the research, the calculation methods of thermal properties of collapsible loess are summarized and sorted out in this paper. The characteristics of soil temperature variation, namely the attenuation and delay of temperature wave, are analyzed. Based on the analysis of the heat transfer process between air and soil in underground buried pipes, the calculation model of parameter change of new air flow through underground buried pipes is established, and the properties of soil, ventilation time, length of buried pipes and buried depth of buried pipes are analyzed with the help of this model. The effect of wind speed (wind volume, buried pipe diameter, inlet air temperature, etc.) on the outlet air temperature of underground buried soil fresh air heat transfer system is discussed, and the feasibility of the application of this system in China is discussed. It provides reference data for the application of underground buried pipe soil fresh air heat transfer system in practical engineering. On the basis of theoretical research, this paper designs the soil fresh wind heat transfer system of the Museum of Zhichengmen ruins in Chang'an City of Han Dynasty, based on the meteorological conditions and soil temperature distribution characteristics in Xi'an region. The design method of the underground buried pipe soil fresh air heat transfer system applied in the building is given from the angle of design and calculation. Finally, the design data and budget quota of the above project are used to invest from the initial stage. The economy of underground buried pipe soil fresh air heat transfer system is analyzed in terms of operating cost.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU83

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