| 摘要: |
| CO2空气源热泵因其优秀的环保和热工性能，具有广阔的应用前景。本文以CO2复叠式空气源热泵分布式集中供暖系统为研究对象，依据JGJ/T 177—2009《公共建筑节能检测标准》和JGJ/T 132—2009《居住建筑节能检测标准》对秦皇岛某公共建筑和石家庄某居住建筑的CO2复叠式空气源热泵供暖系统开展运行测试研究，探究在低温环境下系统运行过程中检测不确定度及实际运行效果。通过不确定度分析，秦皇岛项目2#机组和石家庄项目2#机组制热性能COP在不同运行环境温度下相对合成标准不确定度范围分别为4.27%~5.87%及1.90%~4.36%，测试结果可信度高。测试结果表明：秦皇岛项目在室外日均温度-10.9~2.5 ℃的工况下，1#和2#机组实测日均COP范围分别为2.75~3.09和2.76~3.15。在室外最低温度-18 ℃时，1#和2#机组热COP仍可达到2.19及2.88。石家庄项目在室外日均温度-6.6~12.5 ℃的工况下，1#和2#机组实测日均COP范围分别为2.32~3.38和2.21~3.06；分析两个项目的检测结果可得，CO2复叠式空气源热泵机组在低温环境下COP受室外环境温度影响依然较小。 |
| 关键词: CO2复叠式空气源热泵 分布式集中供暖 系统测试 不确定度 性能系数 |
| DOI： |
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| 基金项目:国家自然科学基金(52236003) |
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| Field Test of a CO2 Cascade Air-source Heat Pump |
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Li Xiaoyu1, Ma Li2, Shi Lin3, Xu Wei4, Wang Tiansheng4
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| (1.Jianke EET Co., Ltd.;2.China Academy of Building Research;3.Department of Energy and Power Engineering, Tsinghua University;4.Jianke EET Co., Ltd.，China Academy of Building Research) |
| Abstract: |
| Carbon dioxide (CO2) air-source heat pumps have broad application prospects because of their excellent environmental protection potential and thermal performance. In this study, the CO2 cascade air-source heat pump was implemented in distributed central heating systems in a public building in Qinhuangdao City and a residential building in Shijiazhuang City. Both cases were tested and analyzed to explore the uncertainty of measurements and the operation performance in extremely cold conditions as per the Standard for Energy Efficiency Test of Public Buildings JGJ/T 177—2009 and the Standard for Energy Efficiency Test of Residential Buildings JGJ/T 132—2009. Based on the uncertainty analysis, the relative combined standard uncertainty ranges of COP (coefficient of performance) of #2 units operating at various ambient temperatures in Qinhuangdao and Shijiazhuang were found to be 4.27%–5.87% and 1.90%–4.36%, respectively. These ranges reveal that the measurements have high reliability. The measured daily heating COP of #1 and #2 units in Qinhuangdao are 2.75–3.09 and 2.76–3.15, respectively, when the outdoor daily temperature range is -10.9–2.5 °C. Even in the lowest outdoor temperature (-18 °C), the heating COP of #1 and #2 unitscan still reach 2.19 and 2.88, respectively. When #1 and #2 units operate in Shijiazhuang with the outdoor daily temperature being -6.6–12.5 °C, the measured daily heating COP are 2.32–3.38 and 2.21–3.06, respectively. The analysis of these two projects shows that the heating COP of the CO2 cascade air-source heat pump is not sensitive to the ambient temperature in extremely cold conditions. |
| Key words: CO2 cascade air-source heat pump distributed central heating system system measurement uncertainty COP |
