摘要
引入焓频的定义,通过焓频法统计室外空气全热的变化。在分析焓频法研究全热交换器节能潜力的基本要点和技术路线的基础上,采用室外空气临界焓值、净回收能量、全热交换器开启率、热回收节能率等重要参量分析与评估全热回收节能潜力。结合案例分析,分别应用焓频法和干频法分析全热交换器热回收节能潜力,两者计算节能潜力结果的最大偏差近15%,从计算过程、参数分布和计算结果三方面对比得到,焓频法在计算过程简便性和计算结果准确性方面明显优于干频法。而针对气象数据中焓值应用较少和统计困难的不足之处,指出可用湿频法替代焓频法,两者节能潜力计算结果偏差较小,在3%以内。指出焓频法具有较好的应用前景和理论价值。
The statistics on the total heat of outdoor air are conducted with the Enthalpy Frequency Method. On the basis of the feasibility of the Enthalpy Frequency Method in the investigation into energy-saving potential for total heat recovery, some important parameters are applied to evaluate energy-saving potential for total heat recovery, such as the critical enthalpy value of outdoor air, the net recovery energy, the operating ratio of the heat exchanger, the energy-saving rate of heat recovery. The Enthalpy Frequency Method and the Dry Bulb Temperature Frequency Method are employed to perform a case analysis on the total heat recovery potential of the heat exchanger, respectively, and the maximum deviation of the two calculation results is near to 15%. From the calculation process, parameter distribution and computing results, the Enthalpy Frequency Method is prior to the Dry Bulb Temperature Frequency Method in the process simplicity and result accuracy. In addition, the Wet Bulb Temperature BIN Method is recommended in the calculation of energy-saving potential because of lack of air enthalpy fi＇equency in meteorological parameters and statistical difficulties in the enthalpy method.
出处
《制冷学报》
CAS
CSCD
北大核心
2010年第1期11-17,共7页
Journal of Refrigeration
基金
国家自然科学基金资助项目(50478113)
上海市教委重点学科建设项目(J50502)
上海高校选拔培养优秀青年教师科研专项基金(slg-07026)
上海市大学生创新活动项目(建筑能耗现场测试方法的实验研究)
上海市教委重点学科研究生创新基金(上海城市风场基本特性的研究)资助~~
关键词
工程热物理
焓频法
全热回收器
临界焓值
净回收能量
热回收节能率
干频法
Engineering thermophysics
Enthalpy Frequency Method
Total heat exchanger
Critical enthalpy value
Net recovery energy
Energy-saving ratio of heat recovery
Dry Bulb Temperature Frequency Method
