Experimental and Analytical Study for Condenser Shading Effects on Air-Conditioning System Performance

2021 ◽  
Author(s):  
Maher Shehadi
Keyword(s):  
System Performance ◽  
Air Conditioning ◽  
Analytical Study ◽  
Air Conditioning System ◽  
Shading Effects

Experimental and Analytical Study for Condenser Shading Effects on Air-Conditioning System Performance

2020 ◽  
Author(s):  
Maher Shehadi
Keyword(s):  
System Performance ◽  
Air Conditioning ◽  
Analytical Study ◽  
Experimental Results ◽  
Air Conditioning System ◽  
Shading Effects

Abstract An experimental and analytical study for performance of shaded condensers is presented. A three tons of refrigeration (TR) unit installed in a 2-story house was experimentally studied between June and September. Analytical simulations for a 3 TR unit and for a wider range of capacities ranging from 80 to 370 TR was done. The experimental results for the 3 TR unit showed 12–39% improvement in the COP of the cycle under various evaporator temperatures with uncertainty levels between ±1.63–13.6%. The simulated results for the same capacity (3 TR) showed higher improvements than the experimental ones. However, for larger capacities, the simulations showed lower improvements than the 3 TR unit and ranged between 10–14%.

Exergy Analysis on a Split-Type Conditioner Using Ejector as an Expansion Device

2014 ◽  
Vol 699 ◽  
pp. 828-833 ◽  
Author(s):  
Sumeru ◽  
Markus ◽  
Farid Nasir Ani ◽  
Henry Nasution
Keyword(s):  
Performance Improvement ◽  
System Performance ◽  
Air Conditioning ◽  
Exergy Analysis ◽  
Energy Savings ◽  
Air Conditioner ◽  
Total Energy Consumption ◽  
Air Conditioning System ◽  
Air Conditioners ◽  
Exergy Losses

Air conditioning system consumes approximately 50% of the total energy consumption of buildings. Split-type air conditioner is the most widely used in residential and commercial buildings. As a result, enhancement on the performance of the air conditioners will yield a significant energy savings. The use of ejector as an expansion device on the split-type air conditioners is one method to increase the system performance. Exergy analysis on a split-type air conditioner uses an ejector as an expansion device at room and outdoor temperatures of 24 °C and 34 °C, respectively, yielded the percentage of exergy reduction up to 40.6%. Also, the exergy losses on in the compressor had the highest impact on the performance improvement of the split-type air conditioner.

EXERGY ANALYSIS OF THE PERFORMANCE OF A VARIABLE REFRIGERANT FLOW (VRF) AIR CONDITIONING SYSTEM

2011 ◽  
Vol 19 (01) ◽  
pp. 57-68 ◽  
Author(s):  
MIGUEL PADILLA
Keyword(s):  
System Performance ◽  
Air Conditioning ◽  
Exergy Analysis ◽  
Control Volume ◽  
Hvac Systems ◽  
Coefficient Of Performance ◽  
Cooling Load ◽  
Air Conditioning System ◽  
Operational Conditions ◽  
Highly Sensitive

Commercial multiple evaporators variable refrigerant flow (VRF) HVAC systems present many advantages such as being energy saving and the capability of adjusting refrigerant mass flow rate according to the change of high rises occurrence. This paper deals with an experimental control volume exergy analysis in a VRF air conditioning system. The experimental results show that the brunt of the total exergy destroyed in the whole system occurs in the outdoor unit, where the exergy destroyed in the condenser is more important. The values of coefficient of performance (COP) obtained for the tests increase as the system reaches operational conditions imposed in every indoor unit zone. The VRF system analyzed is highly sensitive to the action of the constant speed compressor. The use of an inverter compressor improves the system performance by adjusting the power consumption according to the cooling load in the evaporators.

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