ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms...
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Transcript of ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms...
![Page 1: ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK](https://reader036.fdocuments.in/reader036/viewer/2022081605/554a31a7b4c90520578b5214/html5/thumbnails/1.jpg)
Comparison of Solar Sorption Cooling Systems Using TRNSYS Software
Rebecca SelwynMarie-Esther GuillermDr Hind Saidani-Scott
![Page 2: ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK](https://reader036.fdocuments.in/reader036/viewer/2022081605/554a31a7b4c90520578b5214/html5/thumbnails/2.jpg)
Outline
•Traditional Refrigeration•Problems with Vapour Compression Cycles•Sorption Cycles
Introduction
•Aims•Context•System Layout•Comparisons
TRNSYS Simulation
•Results•Discussion
Conclusions
•Improving the SimulationNext Steps
![Page 3: ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK](https://reader036.fdocuments.in/reader036/viewer/2022081605/554a31a7b4c90520578b5214/html5/thumbnails/3.jpg)
Traditional Refrigeration• Vapour
compression cycle• High efficiency (COP
>3)
• Replace compressor with sorption cycle
Heat based compression instead of electric compressor
Condenser
Expansion Valve
Evaporator
Compressor
Qc
W
Qe
![Page 4: ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK](https://reader036.fdocuments.in/reader036/viewer/2022081605/554a31a7b4c90520578b5214/html5/thumbnails/4.jpg)
Vapour Compression vs. Sorption Cycles: Refrigerant
Traditional Refrigerants• Ozone depletion• Montreal Protocol to
eliminate use of traditional refrigerants
Need to find suitable replacement refrigerants
Sorption Refrigerants• Sorbent-refrigerant
working pair• Range of working pairs
give range of characteristics
![Page 5: ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK](https://reader036.fdocuments.in/reader036/viewer/2022081605/554a31a7b4c90520578b5214/html5/thumbnails/5.jpg)
Vapour Compression vs. Sorption Cycles: Compression
Sorption Generator• Pressure increased
through heat cycle• Requires low grade heat
input (>170°C), e.g. Solar thermal or waste industrial heat
Electric Compressor• Climate change• Kyoto protocol to reduce
greenhouse gas emissions
Need to find alternatives to traditional electric compressors
![Page 6: ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK](https://reader036.fdocuments.in/reader036/viewer/2022081605/554a31a7b4c90520578b5214/html5/thumbnails/6.jpg)
Outline
•Traditional Refrigeration•Problems with Vapour Compression Cycles•Sorption Cycles
Introduction
•Aims•Context•System Layout•Comparisons
TRNSYS Simulation
•Results•Discussion
Conclusions
•Improving the SimulationNext Steps
![Page 7: ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK](https://reader036.fdocuments.in/reader036/viewer/2022081605/554a31a7b4c90520578b5214/html5/thumbnails/7.jpg)
TRNSYS Simulation: Aims
Simulation of Sorption
Cooling Systems
Connect pre-defined
components together to model
simple system
Create adsorption chiller component
in Matlab
Use real weather data for heat
source
Compare adsorption and
absorption under identical
conditions
![Page 8: ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK](https://reader036.fdocuments.in/reader036/viewer/2022081605/554a31a7b4c90520578b5214/html5/thumbnails/8.jpg)
TRNSYS Simulation: Context
Malaysian weather dataHuman cooling:– Air conditioned office
environment: ‘Seated, light work, typing’
– PCs, lighting, windows
Food cooling:– Refrigerated storage– Heats of respiration of
fruit and veg.
2m
10m10m
![Page 9: ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK](https://reader036.fdocuments.in/reader036/viewer/2022081605/554a31a7b4c90520578b5214/html5/thumbnails/9.jpg)
TRNSYS Simulation: System Layout
Weather Data
Solar PanelSorption System
Cooling Load
![Page 10: ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK](https://reader036.fdocuments.in/reader036/viewer/2022081605/554a31a7b4c90520578b5214/html5/thumbnails/10.jpg)
TRNSYS Simulation: Comparisons
Cooling System• Absorption– LiBr-water
• Adsorption– Activated carbon-
methanol– Zeolite-methanol– Silica gel-water
Cooling Application• Human cooling (air
conditioning)• Food cooling
(refrigeration)
![Page 11: ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK](https://reader036.fdocuments.in/reader036/viewer/2022081605/554a31a7b4c90520578b5214/html5/thumbnails/11.jpg)
Outline
•Traditional Refrigeration•Problems with Vapour Compression Cycles•Sorption Cycles
Introduction
•Aims•Context•System Layout•Comparisons
TRNSYS Simulation
•Results•Discussion
Conclusions
•Improving the SimulationNext Steps
![Page 12: ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK](https://reader036.fdocuments.in/reader036/viewer/2022081605/554a31a7b4c90520578b5214/html5/thumbnails/12.jpg)
Results: Human Cooling
Sorbent volume (m3) COP0
0.10.20.30.40.50.60.70.80.9
Human Cooling
Zeolite-methanol Silica gel-water Activated carbon-methanol LiBr-water
![Page 13: ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK](https://reader036.fdocuments.in/reader036/viewer/2022081605/554a31a7b4c90520578b5214/html5/thumbnails/13.jpg)
Results: Food Cooling
Sorbent volume (m3) COP0
0.10.20.30.40.50.60.70.80.9
Food Cooling
Zeolite-methanol Silica gel-water Activated carbon-methanol LiBr-water
![Page 14: ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK](https://reader036.fdocuments.in/reader036/viewer/2022081605/554a31a7b4c90520578b5214/html5/thumbnails/14.jpg)
Discussion
• Ratio of COP to required adsorbent volume
• For freezing use activated carbon-methanol
Human cooling Food coolingZeolite-methanol 3.40 3.05Silica gel-water 3.35 4.30Activated carbon-methanol 2.84 3.33
![Page 15: ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK](https://reader036.fdocuments.in/reader036/viewer/2022081605/554a31a7b4c90520578b5214/html5/thumbnails/15.jpg)
Outline
•Traditional Refrigeration•Problems with Vapour Compression Cycles•Sorption Cycles
Introduction
•Aims•Context•System Layout•Comparisons
TRNSYS Simulation
•Results•Discussion
Conclusions
•Improving the SimulationNext Steps
![Page 16: ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK](https://reader036.fdocuments.in/reader036/viewer/2022081605/554a31a7b4c90520578b5214/html5/thumbnails/16.jpg)
Next Steps
Extending the simulation scope
Effect of non-equilibrium
conditions in sorption process
Effect of different climates
Ionic liquids as possible sorbents
![Page 17: ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK](https://reader036.fdocuments.in/reader036/viewer/2022081605/554a31a7b4c90520578b5214/html5/thumbnails/17.jpg)
Thank You
Any Questions?