This work concerns a modeling of habitat equipped
with an adsorption cooling unit powered by a geothermal heat pump in the
context of the climate of the Comoros Islands. Cooling unit is a simple system
consisting of an adsorber, condenser and evaporator. The modeling of the habitat-air
conditioning system was based on a description of heat and mass transfers. The
firstlaw of thermodynamics on the energy conservation using the
analogies between heat and electrical transfers is used to establish the
equations of the model. Zeolite-methanol pair and Dubinin-Astakhov adsorption
model are used to describe the amount of adsorbed mass. The finite difference
method applied to a point of the considered exchange surface is used to
discretize equations and resolve them. The
coupling of the system takes place through a convective transfer between the air inside habitat and the evaporator’s
surface. This article presents results for
typical November days in Comoros. Different temperatures of habitat with and without a cooling unit show
that using the adsorption cooling unit can help lower internal
temperatures. We observe a temperature difference of 2.14 K in particular at 2
p.m., if the air conditioning starts at 8 a.m. The influence of the input
parameters on the air inside the habitat makes it possible to assess the impact
on indoor comfort. The COPth can reach 0.46. However, we can get a high performance if we
optimize temperature thresholds. These
show that this type of cooling unit can help improve the habitat thermal
comfort in a tropical and dry climate.
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