基于JB/T 7225—2017的热水型暖风机热工性能测试分析  

Interpretation on thermal performance test of hot water type unit heater based on JB/T 7225-2017

作　　者：石竹青 杨弋 李宏哲 陈欣 付炜 包继虎 Shi Zhuqing;Yang Yi;Li Hongzhe;Chen Xin;Fu Wei;Bao Jihu(Hefei General Machinery Research Institute Co.,Ltd.)

机构地区：[1]合肥通用机械研究院有限公司

出　　处：《制冷与空调》2023年第11期40-43,共4页Refrigeration and Air-Conditioning

基　　金：安徽省市场监督管理局项目(2022011977)“集中空调冷(热)源系统能效检测与评价技术标准研制”;国家重点研发计划项目(2020YFF0218600)“数据中心和5G基站用冷却设备质量评价技术体系研究及应用示范”。

摘　　要：基于JB/T 7225—2017《暖风机》中热水型暖风机热工性能试验方法,对暖风机的空气侧和热水侧的热工性能特点进行解读,并对空气侧和热水侧的热平衡性进行分析,结果显示热水侧放热量与辅侧放热量不能等同于同一概念。建议采用干空气状态下的质量流量计算空气得热量。归纳暖风机性能测试过程中的一些注意事项:依据0 Pa静压差进行性能测试;空气的体积流量为标准状态下的空气体积流量。为正确理解标准中暖风机的性能计算公式、准确检测暖风机的性能提供指导。Based on the thermal performance test method of hot water type unit heater based on JB/T 7225-2017 Unit heater,the thermal performance characteristics of the air side and the hot water side of the unit heater are interpreted.The heat transfer balance between air side and hot water side is analyzed.The results show that the heat transfer capacity of hot water side is different from that of the auxiliary side.It is suggested that the air heat gain should be calculated by the mass flow in dry air state.Some considerations during the performance test of the unit heater are summarized,namely,the performance tests should be conducted based on 0 Pa static pressure difference;the volumetric flow of air refers to the air volumetric flow under the standard condition.The research results provide guidance for correctly understanding the performance calculation equations of the unit heater in the standard and accurately testing the performance of the unit heater.

关 键 词：暖风机 热水型 热工性能测试 焓值法 风量 静压差 

分 类 号：TU8[建筑科学]