Iranian Journal of Mechanical Engineering Transactions of ISME

Iranian Journal of Mechanical Engineering Transactions of ISME

Numerical study on the performance of a solar adsorption chiller with working pair of activated carbon / Methanol

Authors
1 Department of Mechanical engineering,Yasouj University
2 Yasouj University
3 Department of Energy & Aerospace Engineering, Shiraz university
Abstract
In this article an adsorption refrigeration system with Activated Carbon/Methanol as adsorption working pair placed in a parabolic trough solar collector have been studied. A one dimensional numerical model based on heat and mass transfer equation and adsorption thermodynamic within the porous medium is developed. Equations has been discretized through fully implicit finite difference method in cylindrical coordinate. Discretized equations is written in FORTRAN program. The simulated code has been validated by comparison via experimental work and former numerical results. The code at each point computes bed temperature, pressure and adsorbed mass of refrigerant inside the adsorbent bed. In additional effect of some parameters such as bed diameter, solar irradiance, cooling source temperature, evaporator and condenser temperature and pressure has been investigated. Effect of these parameters on the refrigeration adsorption system has shown through variation of the solar coefficient of performance (COPS) and specific cooling power (SCP). Under the operating conditions of evaporation temperature T_ev=0 ℃, condensing temperature T_con=30 ℃ and adsorption temperature T_ads=25 ℃ according to the experimental model, COPS and SCP are found to be 0.12 and 45.6 w1kg-1 respectively.
Keywords

Subjects


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  • Receive Date 16 May 2018
  • Revise Date 22 August 2020
  • Accept Date 21 June 2021