| 摘要: |
| 为了满足公共建筑中空调系统部分负荷下的节能运行调节需求，制冷机房经常配置多台冷水机组。空调系统中冷水机组能耗占比较高，而机组序列控制在系统满足室内负荷需求与节能中运行起关键作用。为了提高热泵机组的运行能效，本文提出一种空气源热泵机组的序列优化控制方法。首先建立变频空气源热泵机组模型，然后建立多台同型号机组序列优化控制目标函数，同时给出实时建筑负荷下求解机组最佳运行序列组合的算法与步骤。以某工程为例，利用eQUEST软件分析了办公楼全年的空调负荷变化，并在夏季、冬季典型日负荷基础上，对比分析了热泵机组序列优化控制策略与传统策略。结果表明：与传统策略相比，在10%~100%的系统部分负荷范围内，采用序列优化控制策略的机组能耗平均降低13.4%。在夏季典型日，热泵机组能耗降低14.5%；在冬季典型日，热泵机组能耗降低12.3%；在过渡季典型日，热泵机组能耗降低3.3%。在供冷季，采用机组序列优化控制策略能耗降低14.1%；在供热季能耗降低9.0%。热泵机组的序列优化控制策略具有明显的节能效果。 |
| 关键词: 空气源热泵 变频 部分负荷 序列优化控制 节能 |
| DOI： |
| 投稿时间：2016-11-10
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| 基金项目: |
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| Optimal Sequencing Control of Variable-speed Air-source Heat Pumps in Office Building |
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Liu Zhaohui1, Li Zhenyu1, Tan Hongwei2, Xu Wen3, Feng Wenbo3, Yi Biyi3
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| (1.School of Mechanical Engineering, Research Center of Green Building and New Energy, Tongji University;2.School of Mechanical Engineering, Research Center of Green Building and New Energy, UNEP-Tongji Institute of Environment for Sustainable Development，Tongji University;3.Zhejiang Huayun Electric Power Industrial Group) |
| Abstract: |
| The heating, ventilation, and air conditioning (HVAC) system accounts for a large portion of the total energy consumption of a building. When aiming to achieve energy efficiency, the vital factor is optimal operation of the chiller plants, which constitute a large percentage of the system energy consumption. In fact, chiller plants are often configured with multiple chillers, in order to meet the requirements for energy efficient operation of the HVAC systems of public buildings under partial loads. The chiller sequence control plays a significant role in satisfying the indoor load demand and facilitating energy-saving operation. In this paper, to improve the energy efficiency of the air-source heat pumps, an optimal sequencing control strategy is presented, taking an office building as an example. To develop this strategy, a variable-speed heat-pump model and the objective function for optimization of the heat-pump sequence control were first established, so as to determine the optimal solutions under partial building loads. Here, the variation of the actual capacity under different operation conditions was taken into consideration. In addition, the annual cooling and heating loads of the selected office building were analyzed using eQUEST software. It was found that loads greater than 70% of the peak loads occupy only 24% of the cooling time and 8% of the heating time. Finally, the optimal sequencing control strategy was contrasted with the traditional strategy based on the typical daily loads in the summer, winter, and transition seasons; the results indicate that the heat-pump energy consumptions are reduced by 14.5%, 12.3%, and 3.3%, respectively. In addition, the energy consumption for the entire year was analyzed. The results show that the energy consumed by the heat pump is reduced by 14.1% during the cooling season and 9.0% during the heating season following adoption of the optimal sequencing control strategy. Thus, the optimal sequencing control strategy for the heat pump has a remarkable energy saving effect. |
| Key words: air source heat pump frequency conversion part load optimal sequencing control energy efficiency |
