ANALYSIS OF VAPOUR COMPRESSION REFRIGERATION (VCR) BASED AIR CONDITIONING (AC) SYSTEM FOR HOT AND DRY CLIMATIC CONDITIONS IN OMAN

Year 2018, Volume: 4 Issue: 3, 1926 - 1938, 22.03.2018

Muthuraman Subbiah

https://doi.org/10.18186/journal-of-thermal-engineering.408777

Abstract

An evaporative-VCR combined AC system for providing good human
comfort conditions working under hot & dry climate is proposed in this
paper. The system is thermodynamically analysed for hot & dry climate of Muscat,
Oman from April-July 2015 under some reasonable assumptions. The system was
also compared on the basis of saving in cooling load (%) on the cooling coil
for the same sensible cooling rate to the conditioned space from the
conventional VCR-AC working on 100 % fresh air assumption. The saving of
cooling load on the coil was found maximum (64.19%) in the month of April due
to lower outside temperature and minimum (27.36%) for the month of June due to
higher outside temperature. The proposed system can be made more energy
efficient by utilising the exhaust air in cooling the condenser of VCR system
which will improve the COP & hence reduce the power consumption of the
compressor.

Keywords

Evaporative Cooler, VCR System, Cooling Load, Humidifying Efficiency, Conditioned Space

References

• [1] S.A. Nada , H.F. Elattar, A. Fouda.(2015) Performance analysis of proposed hybrid air conditioning and humidification–dehumidification systems for energy saving and water production in hot and dry climatic regions. Energy conversion and Management; 9(6),208-227.
• [2] Claudio Cianfrini, Massimo Corcione, Emanuele Habib, Alessandro Quintino.(2014) Energy performance of air-conditioning systems using an indirect evaporative cooling combined with a cooling/reheating treatment. Energy and Buildings 69(1),490-497.
• [3] Tianwei Wanga, Chenguang Shenga,b, A.G. Agwu Nnanna (2014). Experimental investigation of air conditioning system using evaporative cooling condenser. Energy and Buildings 81(2),435-443.
• [4] Varun Jain, S.C. Mullick, Tara C. Kandpal (2015). A financial feasibility evaluation of using evaporative cooling with air-conditioning (in hybrid mode) in commercial buildings in Oman. Energy for sustainable development. 17(2),47-53.
• [5] Min-Hwi Kim, Jae-Weon Jeong.(2015) Cooling performance of a 100% outdoor air system integrated with indirect and direct evaporative coolers. Energy.5(2),245-257.
• [6] A. Fouda a, Z. Melikyan.(2015). A simplified model for analysis of heat and mass transfer in a direct evaporative cooler.Applied Thermal Engineering 3(1),932-936.
• [7] Chenguang Sheng , A.G. Agwu Nnanna. (2012) Empirical correlation of cooling efficiency and transport phenomena of direct evaporative cooler. Applied Thermal Engineering 40(2),48-55.
• [8] Abdollah Malli , Hamid Reza Seyf , Mohammad Layeghi , Seyedmehdi Sharifian , Hamid Behravesh. (2011) Investigating the performance of cellulosic evaporative cooling pads. Energy and Buildings; 5(2):2598-2603.
• [9] J.M. Wua, X. Huang, H. Zhang. (2009) Theoretical analysis on heat and mass transfer in a direct evaporative cooler. Applied Thermal Engineering .2(9):980-984.
• [10] Y.J. Dai, K. Sumathy. (2002) Theoretical study on a cross-flow direct evaporative cooler using honeycomb paper as packing material. Applied Thermal Engineering 2(2):1417-1430.
• [11] Jose Rui CaAprilgoa, Carlos Daniel Ebinumab, Jose Luz Silveira (2005). Experimental performance of a direct evaporative cooler operating during summer in a Brazilian city. International journal of refrigeration 2(8):1124-1132.
• [12] J.M. Wu, X. Huang b, H. Zhang.(2009) Numerical investigation on the heat and mass transfer in a direct evaporative cooler. Applied Thermal Engineering; 2(9),195-201.
• [13] R.K.Kulkarni, S.P.S.Rajput.(2008). Comparative performance of evaporating cooling pads of alternative materials. International journal of advanced engineering science and technology. 10(2),239-244.