Aiming at the problems of low thermal efficiency and poor thermal stability of traditional Trombe wall in winter, a central heat storage type Trombe wall is proposed. Through finite element fluid analysis software, continuous transient simulations are carried out using the dynamic data of winter and summer solstice in Baoding area, and the changes in indoor temperature, heat collection efficiency and liquefaction rate of phase change materialc (PCM) are analyzed under 9 conditions with different heat storage materials, locations, wheater the central wall is opened or closed, etc. The results show that in cold areas, the thermal efficiency of central phase change heat storage type two-channel Trombe wall (PCM-TP) can reach 31.6% in winter, which is 4% higher than that of traditional Trombe wall structure (AL-OP), the relative daily temperature range is 2.1 ℃ lower, and the night temperature can be up to 8.23 ℃ higher. Compared with traditional Trombe wall in summer, the temperature peak time delay is 4 hours, and the relative value of daily range is 1.57 ℃ lower. In both winter and summer, the performances of the central phase change thermal storage two-channel Trombe wall (PCM-TP) are better than other schemes.
Key words
solar energy /
numerical simulation /
phase change materials /
thermal efficiency /
Trombe wall
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