地板辐射协同地道风供冷系统冷水梯级利用试验研究

地板辐射供冷系统具有房间温度均匀性好、噪声小、运行费用低、舒适度高等优点，但从现有研究来看，地板辐射供冷系统的供冷量与结露之间的矛盾极大地影响了系统推广应用。通过搭建基于虚拟自然冷源的地板辐射协同地道风供冷试验台，从冷水梯级利用的角度，探索冷水串联与混水两种模式下的地板辐射协同地道风系统结露特性、供冷特性与能耗特性，分析冷水梯级利用的节能原理。研究结果表明，冷水梯级利用模式由于供水温度在12℃以上并且结合地道风不会发生结露现象，以不结露、供冷量大、能耗低为目标，用多目标优化方法分析可得串联供水0.5 m³/h、送风量45 m³/h为最优工况，供冷量为474.3 W,系统能耗为238 W。

Experimental Study on the Utilization of Cold Water Cascade by Floor Radiation and Tunnel Air Cooling System

The floor radiant cooling system has the advantages of good room temperature uniformity, low noise, low operating cost and high comfort, but from the existing research, the contradiction between the cooling capacity and condensation of the floor radiant cooling system greatly affects the promotion and application of the system. By building a floor radiation synergistic tunnel wind cooling test bench based on virtual natural cooling source,the condensation characteristics, cooling characteristics and energy consumption characteristics of floor radiation synergistic tunnel wind system under the two modes of cold water tandem and mixed water from the perspective of cold water cascade utilization was explored, and the energy-saving principle of cold water cascade utilization was analyzed. The results show that the cold water cascade utilization mode can obtain a series water supply of 0.5 m3/h, an air supply volume of 45 m3/h as the optimal working condition, a cooling capacity of 474.3 W and a system energy consumption of 238 W due to the water supply temperature above 12 °C and the absence of condensation in combination with tunnel wind.