Imperial College London

ProfessorChristosMarkides

Faculty of EngineeringDepartment of Chemical Engineering

Professor of Clean Energy Technologies
 
 
 
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Contact

 

+44 (0)20 7594 1601c.markides Website

 
 
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Location

 

404ACE ExtensionSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Freeman,
author = {Freeman, J and Ramos, Cabal A and Mac, Dowel N and Markides, CN},
title = {An experimentally validated model of a solar-cooling system based on an ammonia-water diffusion-absorption cycle},
url = {http://hdl.handle.net/10044/1/44632},
}

RIS format (EndNote, RefMan)

TY  - CPAPER
AB - An experimentally validated thermodynamic model of a domestic-scale solar-cooling system based on an ammonia-water diffusion-absorption refrigeration (DAR) cycle is presented. The model combines sub-component descriptions of a DAR unit and a suitably sized (matched) solar-collector array, which are validated separately;outdoor tests are performed on an evacuated-tube (ET) collector over a range of solar-irradiance conditions, while a 150-W (nominal rating) DAR unit is tested in the laboratory with a thermal input provided by controlled electrical heaters. A COP of 0.2 is reported for the DARunit when operating with a generator temperature of 155 °C and a system charge pressure of 20.7 bar. Using the experimentally validated solar-cooling system model, it is found that the area of the collector array required to power the system depends strongly on the type of collector. Annual simulations are also performed in various geographical regions order to predict the system’s cooling output. It is found that a single DAR unit with a 3-m2 ET arrayhas the potential to provide 150-200 kWh per year of coolingin a southern European climate, which amounts approximately to the per capita demand for space cooling in residential dwellings in the same region.
AU - Freeman,J
AU - Ramos,Cabal A
AU - Mac,Dowel N
AU - Markides,CN
TI - An experimentally validated model of a solar-cooling system based on an ammonia-water diffusion-absorption cycle
UR - http://hdl.handle.net/10044/1/44632
ER -