ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK
•Download as PPS, PDF•
1 like•1,594 views
This document summarizes a study that used TRNSYS software to simulate and compare different solar sorption cooling systems. The study aimed to create an adsorption chiller component in Matlab and connect predefined TRNSYS components to model simple systems. The simulation compared absorption and adsorption systems using different working pairs under identical Malaysian weather conditions for human and food cooling loads. Results showed zeolite-methanol and silica gel-water had higher COP to volume ratios for human cooling, while silica gel-water performed best for food cooling. The discussion concluded activated carbon-methanol is best for freezing applications. Next steps proposed extending the simulation scope to model non-equilibrium conditions, different climates, and using ionic liquids
More Related Content
Viewers also liked
Viewers also liked (20)
Similar to ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK
Similar to ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK (20)
More from Engineers Australia
More from Engineers Australia (20)
Recently uploaded
Recently uploaded (20)
ICWES15 - Comparison of Solar Sorption Cooling Systems Using Trnsys Software. Presented by Ms Rebecca Selwyn, Bristol, UK
- 1. Comparison of Solar Sorption Cooling Systems Using TRNSYS Software Rebecca Selwyn Marie-Esther Guillerm Dr Hind Saidani-Scott
- 2. Outline • Traditional Refrigeration Introduction • Problems with Vapour Compression Cycles • Sorption Cycles • Aims TRNSYS • Context Simulation • • System Layout Comparisons • Results Conclusions • Discussion Next Steps • Improving the Simulation
- 3. Traditional Refrigeration Qc • Vapour compression cycle Condenser • High efficiency (COP >3) Expansion W Compressor • Replace Valve compressor with sorption cycle Heat based Evaporator compression instead of electric compressor Qe
- 4. Vapour Compression vs. Sorption Cycles: Refrigerant Traditional Refrigerants Sorption Refrigerants • Ozone depletion • Sorbent-refrigerant • Montreal Protocol to working pair eliminate use of • Range of working pairs traditional refrigerants give range of characteristics Need to find suitable replacement refrigerants
- 5. Vapour Compression vs. Sorption Cycles: Compression Electric Compressor Sorption Generator • Climate change • Pressure increased • Kyoto protocol to through heat cycle reduce greenhouse gas • Requires low grade heat emissions input (>170°C), e.g. Solar thermal or waste Need to find industrial heat alternatives to traditional electric compressors
- 6. Outline • Traditional Refrigeration Introduction • Problems with Vapour Compression Cycles • Sorption Cycles • Aims TRNSYS • Context Simulation • • System Layout Comparisons • Results Conclusions • Discussion Next Steps • Improving the Simulation
- 7. TRNSYS Simulation: Aims Create adsorption Use real weather chiller component data for heat in Matlab source Connect pre- Compare defined adsorption and components absorption under together to model Simulation identical simple system of Sorption conditions Cooling Systems
- 8. TRNSYS Simulation: Context Malaysian weather data Human cooling: – Air conditioned office environment: ‘Seated, light work, typing’ – PCs, lighting, windows 2m Food cooling: – Refrigerated storage – Heats of respiration of fruit and veg. 10m 10m
- 9. TRNSYS Simulation: System Layout Weather Data Solar Panel Sorption System Cooling Load
- 10. TRNSYS Simulation: Comparisons Cooling System Cooling Application • Absorption • Human cooling (air – LiBr-water conditioning) • Adsorption • Food cooling – Activated carbon- (refrigeration) methanol – Zeolite-methanol – Silica gel-water
- 11. Outline • Traditional Refrigeration Introduction • Problems with Vapour Compression Cycles • Sorption Cycles • Aims TRNSYS • Context Simulation • • System Layout Comparisons • Results Conclusions • Discussion Next Steps • Improving the Simulation
- 12. Results: Human Cooling Human Cooling 0.9 0.8 0.7 Zeolite-methanol 0.6 0.5 Silica gel-water 0.4 0.3 Activated carbon- methanol 0.2 0.1 LiBr-water 0 Sorbent volume (m3) COP
- 13. Results: Food Cooling Food Cooling 0.9 0.8 0.7 Zeolite-methanol 0.6 0.5 Silica gel-water 0.4 0.3 Activated carbon- methanol 0.2 0.1 LiBr-water 0 Sorbent volume (m3) COP
- 14. Discussion • Ratio of COP to required adsorbent volume Human cooling Food cooling Zeolite-methanol 3.40 3.05 Silica gel-water 3.35 4.30 Activated carbon-methanol 2.84 3.33 • For freezing use activated carbon-methanol
- 15. Outline • Traditional Refrigeration Introduction • Problems with Vapour Compression Cycles • Sorption Cycles • Aims TRNSYS • Context Simulation • • System Layout Comparisons • Results Conclusions • Discussion Next Steps • Improving the Simulation
- 16. Next Steps Extending the simulation scope Effect of non- equilibrium Effect of different Ionic liquids as conditions in climates possible sorbents sorption process