Solar heating and cooling by a thermochemical process. First experiments of a prototype storing 60 kW h by a solid/gas reaction
Solar heating and cooling by a thermochemical process. First experiments of a prototype storing 60 kW h by a solid/gas reaction
复制标题
DOI：
10.1016/j.solener.2008.01.002
复制
发表时间：
2008-07
期刊：
影响因子：
6.7
通讯作者：
S. Mauran;H. Lahmidi;V. Goetz
中科院分区：
文献类型：
--
作者：
S. Mauran;H. Lahmidi;V. Goetz
利用单变量固/气反应和太阳热能的化学热泵在建筑物空调（冬季或中期供暖，夏季制冷）方面具有潜在的兴趣。它们提供了无损耗的存储功能，并且可能具有高能量密度。选定的反应涉及SrBr 2作为反应物和H2O作为制冷剂流体。它适应于温度的热力学约束（由平面太阳能收集器提供的热量，地板水平上的加热和冷却），并使用对环境和健康影响较小的试剂。反应性盐SrBr 2用膨胀天然石墨以固结材料的形式实施，该固结材料具有可接受的导热性和适于低压的渗透性。原型反应器的总体积为1 m3。它能够存储，与一个完整的反应，60千瓦时或40千瓦时的加热或冷却功能分别。该原型在夏季或旺季的代表性条件下进行了测试;平均加热或冷却功率（通常约为2.5-4kW）仍然不足，因为反应层和交换器壁之间的界面处的热传递较低。然而，这种限制可以明显减弱;这是目前在这些最初的实验之后工作的主题。
The chemical heat pumps using monovariant solid/gas reactions and thermal solar energy are potentially interesting for the air-conditioning of building (heating in winter or mid-season and refreshing in summer). They provide a function of storage without loss and potentially at high energy density. The selected reaction involves SrBr2as reactant and H2O as refrigerant fluid. It is adapted to the thermodynamic constraints in temperature (heat provided by plane solar collector, heating and cooling on the level of the floor) and uses reagents having a weak impact for the environment and health. The reactive salt SrBr2is implemented with an expanded natural graphite in the form of a consolidated material which has acceptable thermal conductivity and permeability adapted to low pressure. The prototype reactor has a total volume of 1m3. It is able to store, with a complete reaction, 60kWh or 40kWh for the heating or cooling function respectively. This prototype was tested under conditions representative of summer or mid-season; the mean heating or cooling powers, typically about 2.5–4kW, are still insufficient because of a low heat transfer at the interface between the reactive layer and the exchanger wall. However this limitation can be clearly attenuated; that is the subject of current work in following these first experiments.