ARAÚJO, A. L. S.; http://lattes.cnpq.br/6536028205635553; ARAÚJO, André Luiz de Souza.
Resumo:
A predictive model for an adsorption solar cooling system using the
activated carbon-methanol pair and its numerical simulation are presented. That model
accounts for instantaneous heat and mass transfers in each one of the machine components
along a characteristic average day for each month. The solar-powered icemaker consists of
the following basic components: a reactor containing an adsorptive bed coupled to a static
solar collector covered by a honeycomb Transparent Insulation Material (TIM), a
condenser and an evaporator. An uniform pressure model for the reactor is considered. The
bed's radial temperature distribution is determined by means of a one-dimensional
numerical method based on a finite-volume technique. The energy equations
corresponding to the other components are solved by using the Newton - Raphson method.
A computer program in C ++ was elaborated to evaluate the machine's performance,
according to meteorological data valid for the hottest six months in Joao Pcssoa (7°8' S,
34°50' WG), whose climate is typically hot and humid. The average thermal efficiency
was about 46% and the solar COP was 0.09, during the six month period considered
(October-March). During this period it was predicted 5-6 kg/day of ice production per
square meter of solar collection surface, for February and December respectively, with
solar irradiations ranging from 20 to 23 .MJ/m .