Preparation and Performance Study of CaCl 2 Composite Adsorbent Based on Rock Wool Board Suitable for Continuous Heat Storage/Release of Trombe Wall

Yutong Xiao, Siyu Wei (), Yuanyi Yang, Chunhao Wang and Shanbi Peng
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Yutong Xiao: The College of Civil Engineering, Southwest Petroleum University, Chengdu 610500, China
Siyu Wei: The College of Civil Engineering, Southwest Petroleum University, Chengdu 610500, China
Yuanyi Yang: The College of Civil Engineering, Southwest Petroleum University, Chengdu 610500, China
Chunhao Wang: Zero-Carbon Biofuel Research Center, Tianfu Yongxing Laboratory, Chengdu 610213, China
Shanbi Peng: The College of Civil Engineering, Southwest Petroleum University, Chengdu 610500, China

Energies, 2024, vol. 17, issue 20, 1-16

Abstract: As a passive solar design technology, the Trombe wall can improve buildings’ energy efficiency and thermal comfort. However, the traditional Trombe wall heating efficiency is low and cannot meet the needs of continuous night heating of the building. To solve these problems, a new type of sheet-like composite adsorbent is proposed in this study, prepared from calcium chloride supported by a rock wool board, a high-porosity building material. The high adaptability of rock wool board to the building wall makes it possible for the composite adsorbent to be directly applied to the Trombe wall. The results show that the macroporous structure of the rock wool board provides a wealth of space for loading hydrated salts. The smaller the density and thickness, the more calcium chloride the rock wool board can carry, speeding up the absorption/deportation process. The rock wool slab-based calcium chloride composite adsorbent has a maximum adsorption capacity of 51% and a heat storage density of about 838 J/g. Achieving the desorbed balance within 8 h and applying it to the Trombe wall is expected to attain continuous heating of buildings and has significant potential in building energy conservation.

Keywords: thermochemical energy storage; sorption storage; salt hydrate; composite materials; Trombe wall (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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