Experimental study on cooling performance of air conditioning system with dual independent evaporative condenser

Liu, Huanwei; Zhou, Qiushu; Liu, Yuling; Wang, Peifeng; Wang, Defa

doi:10.1016/j.ijrefrig.2015.03.012

Cited by 39 publications

(7 citation statements)

References 23 publications

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“…Meanwhile, evaporative cooling is one of the energy-saving, environmentally friendly and sustainable airconditioning technologies, which is now widely used in residential and commercial buildings, especially in hot and arid areas. Furthermore, the evaporative condenser is energy efficient and environmentally friendly air conditioning equipment [28][29][30][31]. For instance, According to the Ref.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on cooling performance and energy saving of gas engine-driven heat pump system with evaporative condenser

Liu

Zhou

Zhao

2016

Energy Conversion and Management

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Section: Introductionmentioning

confidence: 99%

Experimental study on cooling performance and energy saving of gas engine-driven heat pump system with evaporative condenser

Liu

Zhou

Zhao

2016

Energy Conversion and Management

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“…Ettouney [18] experimentally evaluated the performance of an evaporative condenser as the water-air ratio varied and obtained empirical mathematical functions for the heat transfer coefficients. Hajidavalloo and Eghtedari [19] compared two air conditioning systems operating with evaporative and dry condensed units, while Liu [20] analyzed the performance, the heat transfer coefficient and the COP of an air conditioning system, varying the compressor electric supply frequency, dry bulb temperature, air velocity and water flow rate. Junior and Smith-Schneider [21] carried out an experimental analysis on a small-scale evaporative condenser, obtaining empirical equations to predict the heat dissipation as a function of water and coolant temperatures, dry and wet bulb air temperature and water-to-air flow ratio; this analysis was carried out without any control over air conditions.…”

Section: Introductionmentioning

confidence: 99%

Experimental performance comparison between circular and elliptical tubes in evaporative condensers

Starace

Falcicchia

Panico

et al. 2021

J Therm Anal Calorim

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In refrigeration systems, evaporative condensers have two main advantages compared to other condensation heat exchangers: They operate at lower condensation temperature than traditional air-cooled condensers and require a lower quantity of water and pumping power compared to evaporative towers. The heat and mass transfer that occur on tube batteries are difficult to study. The aim of this work is to apply an experimental approach to investigate the performance of an evaporative condenser on a reduced scale by means of a test bench, consisting of a transparent duct with a rectangular test section in which electric heaters, inside elliptical pipes (major axis 32 mm, minor axis 23 mm), simulate the presence of the refrigerant during condensation. By keeping the water conditions fixed and constant, the operating conditions of the air and the inclination of the heat transfer geometry were varied, and this allowed to carry out a sensitivity analysis, depending on some of the main parameters that influence the thermo-fluid dynamic phenomena, as well as a performance comparison. The results showed that the heat transfer increases with the tube surface exposed directly to the air as a result of the increase in their inclination, that has been varied in the range 0–20°. For the investigated conditions, the average increase, resulting by the inclination, is 28%.

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“…Liu et al [19] investigated the cooling performance of an air conditioning system using a dual evaporative condenser. They observed that the COP increased with the air velocity and the water spray rate, while it decreased with ambient dry bulb temperature and compressor frequency.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations on air side heat and mass transfer phenomena in evaporative condensers

Fiorentino¹,

Starace²

2017

IJHT

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The evaporative cooling is an energy saving technology and for this reason is widely used both in industrial and civil fields. The heat and mass transfer phenomena occurring inside their tube banks are hard to study and even if many researchers have faced them, further activities need to be carried out. For this reason, this work aims at investigating with an experimental approach the evaporative condensers performance at the tube scale, focusing on the air side where more complex physical interactions occur. A test rig has been set up made of a rectangular transparent channel where electrical heaters simulate the refrigerant side and embedded Pt100 Resistance Temperature Detectors controlled by a PID set and keep constant a given outer surface temperature. Water and air operating conditions are controlled as well, and this allows to carry out a sensitivity analysis depending on all the parameters influencing those thermo-fluid dynamic phenomena. The results show that the cooling rate decreases with the air relative humidity and dry bulb temperature, while increases with water flow rate and temperature. For the testing cases the maximum improvements deriving from increasing water flow rate and temperature are of 37 % and 14 % respectively.

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Experimental study on cooling performance of air conditioning system with dual independent evaporative condenser

Cited by 39 publications

References 23 publications

Experimental study on cooling performance and energy saving of gas engine-driven heat pump system with evaporative condenser

Experimental study on cooling performance and energy saving of gas engine-driven heat pump system with evaporative condenser

Experimental performance comparison between circular and elliptical tubes in evaporative condensers

Experimental investigations on air side heat and mass transfer phenomena in evaporative condensers

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