| 摘要: |
| 本文以上海某建筑为研究对象，采用Trnsys对该建筑现有的地板辐射供冷系统进行模拟研究。根据该建筑的实际状况，为该建筑设计了顶板辐射供冷系统，将两者进行对比分析。结果表明：相比于地板辐射供冷系统，顶板辐射供冷系统对室内热环境调节更快，热惰性更小。整个供冷季节，地板辐射供冷系统能耗为35 826.2kW?h，顶板辐射供冷系统能耗为34 181.9kW?h，减少了4.59%。针对目前该建筑空调系统运行中存在的问题，对顶板辐射供冷空调系统设计了运行时间表，在满足室内热环境标准的前提下，降低系统能耗。在此基础上，针对该建筑空调系统长期定工况运行的问题，分别设计了变水流量控制系统和变水温度控制系统，对比了两种控制系统的实际运行效果。结果表明：变水温度控制系统对室内热环境变化响应更快，且能耗较低。改进系统运行时间表，并采用变水温度控制后，顶板辐射供冷系统供冷季节总能耗为14 665.3kW?h，相比于原系统能耗大幅降低。 |
| 关键词: 空气-水空调系统 变水流量系统 变水温度系统 系统能耗 |
| DOI： |
| 投稿时间：2018-11-28 修订日期：2019-01-18
|
| 基金项目:泰州市“双创计划”项目资助。 |
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| Simulation of a Radiant Cooling System using Trnsys |
|
Fu Tongwei1, Li Bin1, Xu Pengfei2, Zhai Xiaoqiang2
|
| (1.Institute of Refrigeration and Cryogenic Engineering, Shanghai Jiao Tong University;2.Shanghai Merchant Ship Design and Research Institute) |
| Abstract: |
| In this study, a building in Shanghai is taken as the study object and the existing floor radiant cooling system of the building is simulated using Trnsys. Then, according to the actual condition of the building, a roof radiant cooling system is designed for the building which is compared to the floor radiant cooling system. The results show that the roof radiant cooling system can more rapidly adjust the indoor environment and has a smaller thermal inertia than that of the floor radiant cooling system. During the entire cooling season, the energy consumption of the floor radiant cooling system is 35 826.2 kW?h and that of the roof radiant cooling system is 34 181.9 kW?h, which is 4.59% lower. Given the continuous operation of the air-conditioning system in the building, a running schedule for the roof radiant cooling system is designed that can reduce the energy consumption of the system on the premise of meeting the indoor thermal environment standard. On this basis, given the long-term constant operating conditions of the air-conditioning system in the building, a variable water flow rate control system and variable water temperature control system are designed, respectively, and the actual operation effects of the two control systems are compared. The results show that the variable water temperature system more quickly responds to the changes in indoor thermal environment and consumes less energy. After improving the system running schedule and adopting variable water temperature control, the total energy consumption of the roof radiant cooling system during the cooling season was 14 665.3 kW?h, much lower than the energy consumption of the original system. |
| Key words: air-water air-conditioning system variable water flow rate system variable water temperature system system energy consumption |
