Análise de um modelo de recuperação de calor com trocador de calor de placas fixas

Abstract

The objective of this work is to analyse the application of a sensible heat recovery system in the context of ventilation and air conditioning, meeting as priority demands the thermal comfort, energy efficiency, and indoor air quality of an occupied space. Among the several possible techniques, it was chosen a recovery device formed by a plate heat exchanger with circulating minichannels of the air flows. Its geometric data and operational parameters were compiled in a computer program developed in the MATLAB platform for simulation of the system considering both design conditions and effects of climatic variations related to Rio de Janeiro. Other types of the air conditioning systems were also simulated in the computer code and compared to the recovery system through the exergetic analysis of moist air using both the usual psychrometric approach of perfect gas and a model that applies the virial equation of state. The results showed that the sensible recovery system obtained higher level of efficiency than the other system in applications with room sensible heat factor above 0.7.