关于太阳能储热系统的部分传热特性分析与探讨  

Analysis and Discussion on Partial Heat Transfer Characteristics of Solar Energy Heat Storage System

作　　者：乌云山丹 Wuyunshandan

机构地区：[1]山东建筑大学热能工程学院

出　　处：《洁净与空调技术》2022年第3期28-30,共3页Contamination Control & Air-Conditioning Technology

摘　　要：随着人类社会的发展和新时代的进步,能源越来越受到包括中国在内的世界大多国家的重视和关注。世界上许多国家为了发展持续不断地消耗能源,进而使地球的能源供给紧张,从而导致了能源危机。太阳能作为一种可再生清洁能源具有广泛的应用前景,但是它有波动性、间接性和不可靠性,所以至今为止,太阳能也没能得到广泛的利用。因为这些局限性,相变蓄热技术应运而生,它有蓄热密度大、相变过程温度恒定、过程易控制等优点,国内学者也纷纷开始致力于研究相变蓄热技术,这能很大程度上缓解当今世界面临的能源短缺的危机。时至今日,相变蓄热技术在众多领域有了广泛地应用。目前对于对单一相变材料构成的蓄热系统的研究很多,将多种相变材料级联应用在堆积蓄热床中的研究还并不多见。研究了相变材料热效率的影响因素,包括有初始温度、传热流体进口温度等等。得出结论:提高传热流体进口温度可增大换热速率,提高蓄热效率;传热过程中降低初始温度可增大系统蓄热效率。With the development of human society and the progress of the new era,energy has been paid more and more attention by most countries in the world,including China.Many countries in the world continue to consume energy for the sake of development,which makes the earth’s energy supply tight,thus leading to the energy crisis.Solar energy as a renewable and clean energy has a wide application prospect,but it has volatility,indirectness and unreliability,so up to now,solar energy has not been widely used.Because of these limitations,phase change heat storage technology arises at the historic moment.It has the advantages of high heat storage density,constant temperature of phase change process,and easy process control,etc.Domestic scholars have also begun to devote themselves to the study of phase change heat storage technology,which can largely alleviate the energy shortage crisis facing the world today.Up to now,phase change heat storage technology has been widely used in many fields.At present,there are many researches on the heat storage system composed of a single phase change material,but few researches on the cascading application of multiple phase change materials in the heat storage bed.In this paper,the factors affecting the thermal efficiency of PCM,including the initial temperature and the inlet temperature of heat transfer fluid,are studied.It is concluded that increasing the inlet temperature of heat transfer fluid can increase the heat and increase the heat storage efficiency.Reducing the initial temperature in the heat transfer process can increase the heat storage efficiency of the system.

关 键 词：太阳能蓄热系统 蓄热量 蓄热效率 

分 类 号：TK11[动力工程及工程热物理—热能工程] TK519[一般工业技术—材料科学与工程] TB34