The Effect of Increasing Sub-Cooling on Air-Cooled A/C System's Capacity
The present research covers the effect of adding an extra water-cooled condenser in series with the main vapor compression refrigeration system as a heat sink source for system sub-cooling. An experimental laboratory study has been done on a split unit air conditioner with a (24000 Btu/hr) nominal...
| Main Authors: | , , |
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| Format: | Article |
| Language: | Arabic |
| Published: |
Mustansiriyah University/College of Engineering
2009-03-01
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| Series: | Journal of Engineering and Sustainable Development |
| Subjects: | |
| Online Access: | https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1529 |
| Summary: | The present research covers the effect of adding an extra water-cooled condenser in series with the main vapor compression refrigeration system as a heat sink source for system sub-cooling. An experimental laboratory study has been done on a split unit air conditioner with a (24000 Btu/hr) nominal capacity, taking into consideration the effect of outdoor ambient temperature and cooling load. A high accuracy fully instrumented experimental rig interfaced with a computer has been constructed, specially designed for refrigerant R22, using a capillary tube with a size chosen according to ASHRAE to control the refrigerant mass flow rate. The extra refrigerant sub-cooling temperature difference was between TSC= 5 oC and 10oC, this value was chosen in order to not exceed the limits of the original system sub-cooling. The experimental results show that there is an increase in the system capacity by +1.37% to +7.065% when TSC= 5 oC, for ambient temperature between Tamb=30 oC and 46oC, and +4.1% to +14.13% when TSC= 10oC for the same previous Tamb. The power consumed per ton of refrigeration shows a decrease by -0.948% to -3.417% for TSC= 5oC, and -2.84% to -7.745% for TSC= 10 oC for the same ambient temperature previously mentioned......
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| ISSN: | 2520-0917 2520-0925 |