Comparative performance analysis of ice plant test rig with TiO2-R-134a nano refrigerant and evaporative cooled condenser

Vapor compression cooling systems are widely used in hot and dry climates where the atmospheric temperature in summer reaches around 48 °C and the relative humidity can be below 20%. These cooling systems normally use environmentally friendly gases that do not harm the ozone layer. These systems work with high gas pressure, which consumes high energy and leads to a low coefficient of performance when compared to cooling systems that do not use an environmentally friendly gas. Theoretical and experimental studies have been conducted to find a suitable solution for the performance improvement of this type of cooling system. A possible solution is to lower the temperature of the air before it enters the condenser of the compression cooling system by passing it through a wet pad. The water evaporates due to the latent heat that is withdrawn from the wet pad. The air temperature is reduced to about 11 °C before it enters the condenser of the compression cooling system. This enhancement increases the cooling capacity of the vapor compression cycle by nearly 20% and increases the coefficient of performance by 15%, in addition to reducing the consumed electricity up to 15%. In conclusion, the proposed method of adding a wet pad can significantly enhance the performance of the vapor compression cooling system.

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“…The energy balance for the evaporator (Q L = Q 4−1 ) as shown in Figure (2) can be described in Eq. (12) as follows [31]:…”

Section: Experimental Set-up and System Assumptionsmentioning

confidence: 99%

Performance Enhancement by Using Wet Pad in Vapor Compression Cooling System

Zaidan

Ibrahim

Alkumait

2019

J. Eng. Technol. Sci.

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“…Several studies to improve the performance of refrigerated containers and related to their energy consumption have been carried out. In terms of increasing the efficiency of refrigeration systems, researchers have conducted many experiments in the use of natural coolant [8] and nano refrigerant [9]. Research on controlling environmental conditions has also been carried out by several researchers, one of the experiments using a roof-shade that effectively reduces heat penetration from the environment [10], in addition to the effects of stack containers also showed an influence on the energy consumption of refrigerated containers [11].…”

Section: Introductionsmentioning

confidence: 99%

Analysis of the Effect of Inlet Velocity on Cooling Speed in a Refrigerated Container using CFD simulations

Budiyanto

Suheriyanto

2020

CFDL

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The use of refrigerated containers continues to increase rapidly in line with global trade, this kind of container is commonly used to deliver perishable cargo from producers to consumers over great distances, even between continents. To avoid perishable goods from damages, the temperature inside refrigerated containers was controlled and maintained to keep the cooling performance. The purpose of this study is to investigate the effect of variation inlet velocity on the cooling speed inside a refrigerated container. This study was conducted through a computational fluid dynamic simulation validated with experimental results. The simulation was carried out on the variations of inlet velocity based on low-speed fan mode at 4 m/s equal to 32 circulations/hour, and high-speed fan mode at 10 m/s equal to 80 circulations/hour. The results of the simulation show that the greater the inlet fan speed, the faster the cooling speed. The finding of this study is the cooling speed time of high cube refrigerated container with the low-speed fan is 28 minutes and the high-speed fan is 40 minutes.

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“…The halogen-free refrigerant is applicable in a closed system with relatively less mass charge. It attains a high level of recognition in the '90s and is used in significant engineering systems such as water dispensers, deep freezers, air-ventilation machines, domestic refrigerators, and industrial refrigeration systems [62,63].…”

Section: Low-temperature Technologymentioning

confidence: 99%

Impact of Working Fluids and Performance of Isobutane in the Refrigeration System

Banjo¹,

Bolaji²,

Ajayi³

et al. 2022

Low-Temperature Technologies and Applications

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The effect of heat transfer medium (HTM) on the environment is associated with ozone layer depletion and global warming. The role of HTM (working fluid) in the heating and air conditioning industries is paramount, which cannot be underestimated. The conventional refrigerant has been predominantly used over decades due to their thermodynamic properties. However, hydrocarbon refrigerants such as isobutane are considered substitutes because they have negligible global warming potential and zero ozone depletion. That makes it eco-friendly among other existing refrigerants. The investigation of the refrigeration system’s performance characteristics required consideration for the coefficient of performance, refrigerating effect, and the compressor work; this enables the determination of the system’s efficiency without any assumption. Another factor that suggests a better absorption of refrigerant (working fluid) into a refrigeration system is an increase in the coefficient of performance (COP). The effect will cause a reduction in the rate of energy consumption by the compressor. The result shows that the system’s coefficient of performance when using R600a was 27.1% higher than when working with R134a, with an energy reduction of 23.3%.

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Comparative performance analysis of ice plant test rig with TiO2-R-134a nano refrigerant and evaporative cooled condenser

Cited by 21 publications

References 13 publications

Performance Enhancement by Using Wet Pad in Vapor Compression Cooling System

Performance Enhancement by Using Wet Pad in Vapor Compression Cooling System

Analysis of the Effect of Inlet Velocity on Cooling Speed in a Refrigerated Container using CFD simulations

Impact of Working Fluids and Performance of Isobutane in the Refrigeration System

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