论文-梁俊龙-轮机1107-新版论文-03.doc

目录
摘要 I
Abstract II
第一章绪论 1
研究背景 1
国内外研究现状 1
第二章 ECO-ENERGY热泵机组的热力学分析模型 5
换热器的热力学分析模型 5
换热器里制冷剂的换热系数和压力降系数 6
管翅式换热器的翅片效率计算 7
7
压缩机的热力学分析模型 8
制冷剂流量计算 8
压缩机功率计算 9
压缩机排气温度计算 9
热力膨胀阀的热力学分析模型 9
阀杆位移与通流面积计算 9
通过热力膨胀阀流量的计算 10
10
第三章热泵成霜和融霜运行性能分析 13
热泵成霜运行性能分析 14
15
智能除霜技术 16
第四章 ECO-ENERGY热泵机组产品设计及总结 18
ECO-ENERGY热泵机组产品设计 18
ECO-ENERGY热泵机组产品总结 21
第五章结论 25
参考文献 26
致谢 28
摘要
当前,能源和环保问题越来越成为人们所关注的焦点,加上近年来可持续发展理论的提出,空气源热泵空调系统成为空调领域的热点,由于其具有高效节能、环境污染小,运行稳定可靠等优点,备受业界青睐。
本设计对空调器制冷系统四大主要部件(换热器、热力膨胀阀、压缩机和毛细管)进行性能仿真。在此基础上,通过确定制冷剂充注量,将上述四大部件串联起来形成制冷系经仿真主模块。同时,还对研究了换热器、热力膨胀阀、压缩机、毛细管的传热特性和流动特性。另外,系统地分析了空气源热泵机组系统结霜和除霜特性。
最后对本设计工作做了总结与展望。
关键词:ECO-ENERGY热泵机组;换热器;压缩机;智能化;除霜
Abstract
Nowadays, energy efficiency and environmental protection are the focus of most concern; moreover, the sustainable development has being been implemented in more fields. Air source heat pump systems e the research focus because of its advantages such as high efficiency and energy saving, low environmental pollution, stable and reliable operation; thus, such heat pump systems are deeply favored by the professional personnel.
The performance simulation was carried out to the refrigeration system (primarily including heat exchangers, thermal expansion valve, compressor and capillary) in this study. On this basis, the four ponents are connected in series by determining the filling amount of refrigerant. At the same time, heat transfer and flow characteristics were also studied to the four ponents. In addition, frosting and defrosting features were systematically analyzed to the air source heat pump system.
The last part is summary and prospect of this thesis.
Keywords: ECO-ENERGY Heat Pump; heat exchanger; compressor; intellectualization; defrosting
第一章绪论
研究背景
从热力学的角度来讲,热泵就是利用冷凝器放出的热量来供热的制冷系统。和一般的制冷机器相比,热泵的工作目的和工作温度范围有所不同。
在工程实践上,热泵和制冷机有许多共同点,也有许多不同点。热泵这