Abstract
Facing the current energy situation, the world’s energy supply and consumption is developing in diversification, cleanliness, and efficiency. Chemical heat pump (CHP) systems using calcium sulfate have been well studied in recent decades. However, systematic research based on simulations and experiments of coupling the off-grid CHP system and solar thermal system for cooling and heating (Solar Chemical Heat Pump: SCHP) is still insufficient. In this study, a simplified simulation model has been built for heat/mass transfer analysis of the SCHP heat storing step using the finite difference method (FDM) in order to make SCHP design easily. Simulated results were compared with previous experimental data to ensure feasibility. The effects of heat-transfer fluid type, heat exchanger structure, solar irradiance, and ambient air temperature on the chemical heat storage performance of the SCHP system were examined by the simulation. This study quantified reactant temperature, dehydration conversion, and COPs. Using the low-viscosity heat-transfer fluid, increasing the exchanger heat and the solar collector area can obtain a higher COP even under low solar irradiance and low ambient air temperature conditions.
Published Version
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