载冷剂无相变换热LNG重卡冷能利用空调特性研究

发布时间：2018-01-13 02:33

本文关键词：载冷剂无相变换热LNG重卡冷能利用空调特性研究　出处：《中原工学院》2017年硕士论文　论文类型：学位论文

【摘要】：近年来,大气污染日益严重,雾霾肆虐、能源短缺等问题严重困扰着人们的日常生活。LNG(Liquefied Natural Gas)集储运空间小、热量大、性能好、费用低等多种优点于一身,逐渐发挥其独特优势。LNG作为车用燃料有经济、安全、环保三大优势,其最终被利用时往往是气态,汽化过程释放大量冷量,约为830-860k J/kg。本文在文献综述的基础上,阐述了LNG产业发展现状,介绍了LNG冷能的多种回收利用方式及各自对应的温区,对比了其优缺点,并对我国LNG产业发展前景及现今国内LNG冷能利用发展项目进行了较为详尽的分析。针对LNG重卡一方面需要将LNG汽化后进入发动机燃烧,另一方面驾驶空间又存在制冷需求,本文拟将LNG冷能与汽车空调相结合,使LNG汽化产生的冷量供应驾驶室使用。通过对比经验估算法得到的驾驶室冷负荷及编程软件EES理论计算出的LNG可释放总冷量,确定了系统的可行性。该系统不仅可避免传统空调造成的能源消耗,而且可有效回收LNG释放的冷量,符合我国节能减排战略。本文在进行理论分析的基础上,选取适用于低温冷量提取的HNZ1型载冷剂,设计出载冷剂无相变换热LNG重卡冷能利用空调系统。运用软件Aspen plus模拟系统流程,结果显示,在设定工况参数下,空调制冷量为3.704 k W,满足系统制冷要求,同时,蓄冷器每小时可蓄存冷量0.41 k W,可满足多工况下空调系统的正常运行。基于此,搭建了LNG冷能回收空调系统实验台,并进行了静态实验,实验结果表明,该系统运行良好,制冷迅速,且能够满足驾驶室冷量需求,为相关项目的实施提供了参考依据。
[Abstract]:In recent years, the increasingly serious air pollution, haze raging, the problem of energy shortage and serious problems with people's daily life.LNG (Liquefied Natural Gas) in storage space is small, heat, good performance, low cost and many other advantages in one, gradually play its unique advantages of.LNG as a vehicle fuel economy, safety, environmental protection three the big advantage, which was eventually used is often a lot of cold gas, the release rate of vaporization process is about 830-860k J/kg., based on the literature review, describes the current development of LNG industry, introduces the temperature variety of LNG cold energy recovery and utilization respectively, compared the advantages and disadvantages, and the development of the prospect of LNG industry in China and the cold energy of LNG for a more detailed analysis using the development project. On the one hand needs to be LNG LNG heavy truck after vaporization to engine combustion, on the other hand, driving space and refrigeration Needs, this paper will combine with the cold energy of LNG automotive air conditioning, cold room supply driving LNG vaporization generated using empirical estimation. Through the comparison of the cab and cooling load of EES programming software theory method to get the calculated LNG can release the total cooling capacity, determine the feasibility of the system. The system can not only avoid the traditional air conditioning energy consumption caused by cold, and can effectively recycle LNG release, in line with the strategic energy saving and emission reduction in China. In this paper, on the basis of theoretical analysis, select suitable HNZ1 in cold extraction of refrigerant, design a refrigerant without phase change heat LNG heavy cold energy utilization of the air conditioning system. The simulation system the process, using the software of Aspen plus showed that in the setting of operating parameters, air-conditioning cooling capacity of 3.704 K W, to meet the cooling requirements, at the same time, cold storage per hour storage cooling capacity of 0.41 K W, which can meet the conditions of the air conditioning system Based on this, a LNG cold energy recovery air conditioning system experimental platform is built, and a static experiment is carried out. The experimental results show that the system runs well, the refrigeration is fast, and it can meet the demand of the cab cooling capacity, which provides a reference for the implementation of related projects.

【学位授予单位】：中原工学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU831

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