太阳能—土壤源热泵系统太阳能保证率的研究

发布时间：2018-03-01 09:19

本文关键词： 太阳能土壤源热泵保证率敏感性分析 TRNSYS　出处：《大连理工大学》2013年硕士论文　论文类型：学位论文

【摘要】：社会经济飞速发展,能源却逐渐衰竭。为促进经济可持续发展,推进节能减排政策,提倡开发新能源和可再生能源等方针势在必行。由于利用了太阳能和浅层地热能这两种储量丰富且易于收集的清洁可再生能源,太阳能-土壤源(Solar Assisted Ground-source,简称SAGS)热泵系统在节能环保方面具有其它供冷热系统无法比拟的优势。太阳能保证率体现了系统太阳能热利用程度,是太阳能-土壤源热泵系统重要的设计参数。受地理、气候、负荷特性等因素影响,太阳能保证率最佳值涉及问题复杂,研究难度大,目前国内外对该问题的研究相对不足。鉴于此,本研究采用实验研究和模拟分析相结合的方法,从不同角度分析了系统太阳能保证率选取问题,并综合给出最佳太阳能保证率选取的相关建议。首先,本文以大连理工大学土壤源热泵系统为基础,设计并建立了太阳能-土壤源热泵实验系统,该系统具有夏季供冷、冬季供热、过渡季蓄热三种运行模式,用以满足此类系统实验研究。其次,本文以TRNSYS软件为平台,建立了对应于实验系统的数学仿真模型,用以进一步的系统分析。利用建成后的系统进行了三组实验研究,确保基于TRNSYS软件所建数学模型的正确性。分析结果表明,本研究所建数学模型较为准确,可满足更深入、更全面的系统研究。最后,利用经过验证的数学模型分析系统太阳能保证率问题。以大连地区办公建筑为例,结合《公共建筑节能(65%)设计标准》(辽宁省地方标准)DB21/T1899-2011,本文具体分析了系统最佳太阳能保证率选取方法。利用DeST软件分析建筑全年逐时负荷,并用TRNSYS软件深入分析系统性能。选用集热器面积、水箱容积、跨季节蓄热启动温度、地埋管深度、地埋管数量5个因素,运用正交试验原理,分析系统太阳能保证率敏感性,并从运行能耗、土壤温度平衡、系统经济性等角度给出相关建议。结合对不同地区、不同类型建筑、不同节能率建筑的分析,综合给出关于太阳能保证率选取方面的合理建议。研究结果表明,集热器面积是系统供暖季太阳能保证率的高度显著性影响因素,设计集热器面积应最大程度地满足系统经济性高、土壤温度基本实现平衡、运行能耗低,此时的太阳能保证率为系统最佳太阳能保证率,且其与所在地太阳能资源状况以及建筑体形系数、负荷特性、节能率等因素相关。
[Abstract]:The rapid development of social economy, energy is gradually failure. To promote sustainable economic development, promote energy-saving emission reduction policies, promote the development of new energy and renewable energy policy imperative. Due to the use of solar energy and shallow geothermal energy reserves of two kinds of rich and easy to collect clean and renewable energy, solar energy and ground source (Solar Assisted Ground-source. Referred to as SAGS) for heating and cooling heat pump system has incomparable advantages in energy conservation and environmental protection. The solar guarantee rate reflects the system of solar thermal utilization, is an important design parameter of solar ground source heat pump system. By geography, climate, factors affecting the load characteristics, the rate of the best value relates to complex problems to ensure solar energy research the difficulty, the current domestic and foreign research on this issue is relatively insufficient. In view of this, this study adopts the methods of experiment and simulation analysis In this paper, the selection of solar energy guarantee rate is analyzed from different angles, and some suggestions on the selection of the best solar energy guarantee rate are given.
First of all, based on the ground source heat pump system of Dalian University of Technology, a solar ground source heat pump experimental system is designed and built. The system has three operation modes, namely, summer cooling, heating in winter and heat storage in transitional season, so as to meet the experimental research of such systems.
Secondly, based on TRNSYS software platform, established a mathematical model corresponding to the experimental system, for further system analysis. Three series of experiments were carried out using the completed system, ensure the accuracy of the mathematical model based on the TRNSYS software. The analysis results show that the proposed model is accurate. The system can meet the deeper and more comprehensive study.
Finally, by using the validated model analysis system guaranteed solar rate problem. Office building in Dalian area as an example, combined with the "public building energy efficiency design standards (65%) > (Liaoning provincial standard) DB21/T1899-2011, this paper analyses the best solar system guarantee rate selection method. Analysis of building load by using DeST software. The performance of the system and analyzed by TRNSYS software. The collector area, tank volume, seasonal storage temperature, the depth of buried pipe, 5 factors the number of buried pipes, using the principle of orthogonal test and analysis system of guaranteed solar rate sensitivity, and from the energy balance of soil temperature, angle of system of economy are related according to the proposal. In different regions, different types of construction, analysis of different building energy saving rates, given about solar guarantee rate of selecting the reasonable proposals on the table. The results of the study The collector area is heating solar energy to ensure highly significant influencing factor of rate, design of collector area should be to maximize economic system of high soil temperature, the basic realization of balance, low energy consumption, the solar fraction is the best solar system can guarantee rate, and with the status of solar energy resources the location and the building shape coefficient, load characteristics, energy saving rate and other related factors.

【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU831

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