Asking about cycle of a solar thermal refrigeration using Ethanol ?
https://files.fm/u/c6ejd8wrm#/view/bvpz7smc3
From above link is a full documents about Design and Construction of a Solar Thermal Refrigeration System for Patna, India
Some specification
refrigerant ==> Ethanol
high presser ==> 1 bar , high pressure Temperature ==> 78 degree celsius
low pressure ==> 0.01 bar , high pressure Temperature ==> 0 degree celsius
I tried to read for cycle working but i don't understand Why After Ethanol leave from Evaporator. it's have low pressure about 0.01 bar, how they do for increase Ethanol pressure from 0.01 bar to 1 bar without any pump for start a new cycle again ?
Thank you.
Dear Mongkon:
Ethanol is environmentally friendly, non-toxic, has a relatively high vapor
pressure even at low-temperature levels and its low freezing temperature makes it a better alternative as sustainable working fluid. The highest Coefficient of Performance (COP) value achieved by an adsorption cooling system using adsorption pair activated carbon-ethanol is 0.8 (Critoph 1988). Thus, activated carbon-ethanol adsorption pair makes a good choice of refrigerant in terms of environmental and system performance.
I think, you could benefit from this valuable research about your topic:
"EXPERIMENTAL AND LIFE CYCLE ANALYSIS OF A SOLAR THERMAL
ADSORPTION REFRIGERATION (STAR) USING ETHANOL - ACTIVATED
CARBON"
By Bipin Karki, Dayton, Ohio ... May 2018.
I attached the pdf file ...
I hope it will be helpful ...
With my best wishes ...
Dear Mongkon Taweebunlon
These articles might be useful, have a look:
1. https://www.semanticscholar.org/paper/Experimental-and-Life-Cycle-Analysis-of-a-Solar-Karki/59e1e79a4de7777d5ef1c51ceb05fec061887067
2. https://scialert.net/fulltextmobile/?doi=ajsr.2013.146.156
Kind Regards
Qamar Ul Islam
Hi,
increasing the pressure without pump could be achieved either by controlling the volume or increasing the temperature.
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