Abstract
A dynamic computer simulation model of a solar powered aqua-ammonia absorption cooling system with refrigerant storage is presented. The model requires a known solution flow-rate as well as average hourly weather data and the cooling load pattern as input parameters and is capable of predicting various heat flows, temperatures, concentrations, mass flows and mass stored in the absorber/condenser stores. The design parameters of the system components are evaluated at rated conditions using the steady state model. Test simulation of the dynamic model is carried out with the cooling load corresponding to a typical cold storage house on a hot summer day. It is found that the refrigerant stored during excess generation hours may not be sufficient to meet the cooling load during off-generation hours, and hence, provision to evaluate the auxiliary refrigerant mass required and the fraction of the load met by solar energy is included in the simulation model. Thus, the concept of refrigerant storage within the cycle is feasible, but it has to be integrated with other storage options for absorption cooling systems.
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