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Theoretical Study of an Intermittent Water-Ammonia Absorption Solar System for Small Power Ice Production

by João M. Garcia 1,2,* and Armando Rosa 3
1
Mechanic Engineering Department, Escola Superior de Tecnologia de Setúbal/IPS Campus do IPS, Estefanilha, 2760-761 Setúbal, Portugal
2
CINEA-IPS, Energy and Environment Research Centre, 2760-761 Setúbal, Portugal
3
Escola Superior de Tecnologia de Setúbal/IPS, IPS Campus, Estefanilha, 2760-761 Setúbal, Portugal
*
Author to whom correspondence should be addressed.
Sustainability 2019, 11(12), 3346; https://doi.org/10.3390/su11123346
Received: 6 March 2019 / Revised: 12 May 2019 / Accepted: 6 June 2019 / Published: 17 June 2019
(This article belongs to the Section Energy Sustainability)
This article is dedicated to the design, calculation and dimensioning of a small powered refrigeration system (132W) which produces ice bars (freezing) using solar thermal power, and resorts to an intermittent cycle absorption circuit with a water-ammonia mixture (H2O-NH3). The aim of this equipment is to minimize problems faced in places where there is no electric network to supply traditional refrigeration systems which preserve perishable products produced or stocked there, as well as drugs (vaccines), namely for specific regions of developing countries. The system developed can be divided into two parts. The intermittent cycle absorption refrigeration system uses a binary water-ammonia solution (H2O-NH3), where water is the absorber and the ammonia is the coolant and the thermal solar system. This is made up of CPC flat plate thermal collectors or vacuum tubes in which solar energy heats the water that circulates in the primary circuit. In the absorption circulation system, circulation occurs in a natural way due to the fluids affinity, and the temperature and pressure internal variations. This article shows the assumptions underlying the conception, calculation and dimensioning of the system’s construction. View Full-Text
Keywords: ice production; refrigeration systems; intermittent absorption cycle; solar thermal energy ice production; refrigeration systems; intermittent absorption cycle; solar thermal energy
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Garcia, J.M.; Rosa, A. Theoretical Study of an Intermittent Water-Ammonia Absorption Solar System for Small Power Ice Production. Sustainability 2019, 11, 3346.

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