SIMULAÇÃO E ESTUDO DE CASO DE UM TROCADOR DE CALOR SOLO-AR EM TERESINA-PI

Abstract

The increasing evolution of the use of renewable energy or the search for reducing electricity costs has made it necessary to search for alternatives for several systems, including air conditioning systems, and triggering the development of passive cooling systems. This work carried out a case study for a ground-to-air heat exchanger. The objectives are based on using an analytical model for the heat exchanger and the ground, as well as simulating and evaluating the cooling capacity in the Teresina-PI region and developing a code in Octave 8.4.0 for the described model. Then, the applied methodology started from the analytical equation for the ground, which is modeled as a semi-infinite, homogeneous medium with boundary conditions for undisturbed ground temperature, in addition to the model for the heat exchanger, counting on outlet temperatures, thermal potential and heat flux to the environment from the heat exchanger. The results analyzed were outlet temperature, with the months with the lowest values ​​concentrated in the second half of the year, between August and December, and the highest between February and May. The thermal potential and the heat flow from the exchanger have similar behavior and increased their values ​​in the same period. It was concluded that there is cooling capacity between the months of June to December, in addition to January, as well as for heating from February to May, and in the month of December.