中央空调系统节能研究

【作者】 王建伟；

【导师】 孙文哲； 章学来；

【作者基本信息】 上海海事大学 ， 制冷与低温工程， 2006， 硕士

【摘要】 在能源日益短缺的今天，节能已经成为整个社会各行各业研究的热点问题。建筑业作为主要的耗能大户，其能耗占能源总消费量中的30％左右，因此对建筑节能的研究从二十世纪七、八十年代开始以来从没有停止过。2005年7月1日起正式实施的《公共建筑节能设计标准(GB50189-2005)》对建筑节能提出了更高要求。本文正是基于这一背景对建筑中的空调系统节能展开研究。 空调系统冷冻水大温差能够降低水泵能耗，实现空调系统的节能；但同时也会影响空气处理装置的性能，降低了这些设备的制冷能力和除湿能力，反过来增加空调系统的能耗。本文针对这一问题进行了深入研究，提出一种新型中央空调系统解决方案来解决二者的矛盾。 本文得出的主要结论如下： 首先，提出新风机组与末端设备相串联的新型中央空调系统解决方案。常规空调系统的新风机组与末端设备相互并联，冷冻水大温差时进入新风机组和末端设备的温差相同，这造成了整个空调系统在节约冷冻水泵能耗的同时也降低了末端设备的冷量增加了能耗。新风机组与末端设备相串联的中央空调技术，能够保证末端设备两侧温差满足要求，降低了大温差对末端设备的不利影响 其次，实现了冷冻水冷量的梯级利用。由于采用新风机组与末端设备相串联的中央空调技术，低温冷冻水依次处理温度相对较低的室内空气和温度相对较高的室外空气，减小了换热过程的传热温差，降低了不可逆过程的能量损失，达到了低温冷冻水冷量的梯级利用，提高了能源利用率。 最后，介绍合理选择风机盘管的ε值分析法。ε值分析法综合兼顾室内热湿过程、新风终参数和风机盘管热工性能三者，既发挥了风机盘管的除热、除湿潜力，又能满足室内设计参数不偏离预期的状态点，是较合理的设计方法。更多还原

【Abstract】 Nowadays, along with the increasingly short energy, the whole social pays more attention to the research on energy saving. As a main consumer of energy, the building industry takes up about 30% of the total energy consumption. And the research on energy saving in building industry has never suspended since 1970s.The Design standards for energy efficiency of public buildings (GB50189-2005) was put into practice in July 1st, 2005, which puts forward higher requests to the energy saving of buildings. On the basis of such a background, this paper is dedicated to launch a research to the air-conditioning system energy saving in building.The large temperature difference of chilled water can lower the energy consumption of water pump and achieve to economize energy in the air conditioning system; however, it will influence the function of the AHU, lower its refrigeration power and dehumidifying capability, and in turn increase the energy consumption of air conditioning system. This paper makes a thorough research on the issue, putting forward a new solution for the central air conditioning system to resolve the conflict.The main conclusions of this paper are as follows:Firstly, the paper puts forward a new solution of central air conditioning system that includes the series connection of new breeze plants and end equipment. Usually, in the design for large difference temperature, new breeze plants are in parallel with the end equipment, and the temperature difference in new breeze plants is the same with that in end equipment, which increases the energy consumption of plants, while economizing the power of chilled water pump. This new solution can not only ensure that the temperature difference between the both sides of end equipment meets the request, but also lower the negative effect on the end equipment.更多还原