Iranian Journal of Mechanical Engineering Transactions of ISME

Iranian Journal of Mechanical Engineering Transactions of ISME

Analysis of Energy and Exergy of Ammonia Salt Double Effect Absorption Refrigeration System with Solar Collector

Author
Sadegh Asadi
PhD Candidate of Mechanical Engineering, Department of Engineering, University of Mohaghegh Ardabili, Ardabil, Iran
10.30506/ijmep.2023.552845.1871
Abstract
In this paper, we investigate a two-effect adsorption refrigeration system that works with ammonium lithium nitrate and sodium ammonia thiocyanate solutions. The energy required by these systems is supplied by a solar collector. The efficiencies of the first and second laws of the absorption refrigeration system are obtained in three parallel and inverse series arrangements and are compared with each other. In this study, we showed that the amount of energy efficiency and exergy of the two-effect system in the series arrangement is the lowest among the three arrangements. The system works with ammonia solution of lithium nitrate at a lower temperature than the ammonia solution of sodium thiocyanate. Energy consumption is supplied through preheating and collector solar energy. The system with sodium thiocyanate ammonia solution uses more solar energy, which in the lowest case is 29.64% more than the system with sodium thiocyanate ammonia solution. Burning natural gas is the heat that comes from solar energy to get the energy consumed by the generator. bring. The amount of carbon dioxide produced by preheating combustion is obtained, which in its lowest case for a series arrangement with ammonia lithium nitrate solution is 72.16% less than the same arrangement with ammonium sodium thiocyanate.
Keywords
Absorption refrigeration
Ammonia salt
Solar energy
Energy
Exergy
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  • Receive Date 29 April 2022
  • Revise Date 21 November 2022
  • Accept Date 18 June 2023