Computational Fluid Dynamics Analysis of an Evaporative Cooling System

Kapilan, N.; Gowda, M. Manjunath; Manjunath, H. R.

doi:10.1515/scjme-2016-0026

Cited by 13 publications

(4 citation statements)

References 4 publications

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“…M. H. SHAIK et al (2020) performed a first and second law analysis of low GWP refrigerants as a stand-in to refrigerator and from that they conclude that HFO-1234yf is the elite option for swap to R134a in a refrigerator without changes [14]. Kapilan et.al conducted a computational fluid dynamic analysis to study the refrigerator and air-conditioning evaporative cooling system [15]. SK Mohammad Hasheer and Kolla Srinivas (2019) performed theoretical analysis of different refrigerant mixtures as stand-in to R-134 in refrigerator and from that analysis they concluded that R152A/ HFO-1234ze (E) (by mass 50:50) can be utilized as an immediate trade for HFC-134a without rolling out any improvements to the compressor [16].…”

Section: Introductionmentioning

confidence: 99%

Energy Analysis of HFC-152a, HFO-1234yf and HFC/HFO Mixtures as a Direct Substitute to HFC-134a in a Domestic Refrigerator

Hasheer

Srinivas²,

Bala³

2021

Strojnícky Časopis - Journal of Mechanical Engineering

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The Kyoto protocol emphasized the need of replacement of HFC refrigerant due to their high GWP values that causes pollution in the environment. So in this paper the refrigerants R1234yf, R152a and HFOs/HFCs mixtures of R134a/R152a/R1234yf such as ARM42 (in the ratio of 8.5/14 /77.5 by mass), ARM42a (in the ratio of 7/11/82 by mass) with a view of replacement of the refrigerant HFC-134a in a domestic refrigerator were analyzed theoretically. Volumetric cooling capacity, compressor discharge temperature, coefficient of performance, compressor energy consumption and refrigeration capacity are the main parameters to estimate the performance of the refrigerator. The results are revealed that HFC-152a had gave a superior performance as compared to HFC-134a in terms of COP and equal cooling and volumetric cooling capacities. However, the refrigerant HFC-152a was flammable and runs with high compressor outlet temperature which may restrict its usage. The HFO refrigerant R1234yf showed an almost equal volumetric cooling capacity, compressor energy consumption, refrigerating effect and COP when compared with HFC-134a. Among the refrigerants ARM42 and ARM42a, the refrigerant ARM42a was selected as a good alternative for HFC-134a because the Volumetric cooling capacity and COP of ARM42a were almost equal to HFC-134a. Therefore ARM42a had better choice of direct substitute to HFC-134a in a domestic refrigerator when the corresponding safety requirements are adopted. So on overall comparison of every property of refrigerants we can conclude that R1234yf can be treated as best alternative to HFC-134a in a domestic refrigerator.

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Section: Introductionmentioning

confidence: 99%

Energy Analysis of HFC-152a, HFO-1234yf and HFC/HFO Mixtures as a Direct Substitute to HFC-134a in a Domestic Refrigerator

Hasheer

Srinivas²,

Bala³

2021

Strojnícky Časopis - Journal of Mechanical Engineering

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“…Heat recovery represents a basic tool for reducing energy consumption in heating, ventilation and air conditioning (HVAC) systems. The most important part of each heat recovery system is the heat exchanger [1,18]. Oscillating (or pulsating) heat pipes -OHPoriginally presented by Akachi provide new possibilities for heat transfer devices thanks to their unique two-phase heat transfer mechanism [2].…”

Section: Introductionmentioning

confidence: 99%

HVAC Systems Heat Recovery with Multi-Layered Oscillating Heat Pipes

Kabát

Gužela

Peciar

2019

Strojnícky Časopis - Journal of Mechanical Engineering

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The aim of this work is to investigate a heat performance of a Multi-Layered Oscillating Heat Pipes Heat Exchanger (ML-OHPHE) for the application of heat recovery in heating, ventilation and air conditioning systems (HVAC systems). The heat exchanger is investigated experimentally under different conditions of heat loads and filling ratios. The experimental data results are compared to the data obtained from Honeywell’s UniSim® Design Suite software. In the end the NTU analysis of the ML-OHPHE is done and a value of overall heat transfer coefficient is calculated. The results of the experiments indicate that the ML-OHPHE could serve as a completely passive heat transfer device in the application of heat recovery in HVAC systems.

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“…From those experiments, they came to conclusion that HFO-1234yf and R152a have a very good substitute to HFC-134a.Hasheer and Srinivas [13] conducted a theoretical investigation on low GWP refrigerants as a direct substitute to R134a in a domestic refrigerator and conclude that R1234yf can be used as a direct substitute to R134a. Kapilan et.al [14] performed a CFD analysis is used to analyse the evaporative cooling system in a refrigerator and air-conditioning system. KABÁT Juraj et.al [15] performed an experiment on heating, ventilation and air conditioning systems and conclude that the onset of stable oscillations of the working fluid heavily increases the heat transfer performance compared to the empty heat exchanger.so heat exchanger also plays an important role in improving the performance of a refrigeration system.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Analysis of Low GWP Refrigerant Mixtures in a Refrigerator as Replacement to R-134A

Hasheer

Srinivas²

2019

Strojnícky Časopis - Journal of Mechanical Engineering

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Chlorofluorocarbons and hydro chlorofluorocarbons (HCFCs) are replaced by hydroflourocarbons (HFCs) which is not harmful to the ozone layer. However, few of HFCs have a relatively high global warming potential (GWP) and are subject to further examination due to growing concerns about global climate change. The goal now is to find the next generation of environmentally sustainable work fluids with an insignificant direct environmental impact in terms of ozone depletion and global warming potential. This document introduces the mixture of low-GWP refrigerants like R440A, R430A, R1234ze (E)/152a (50:50 by mass), R290/600a (40/60), R290/600(60/40), R290/600(50/50), ARM 42,ARM 42a and AC5 are used to replace R-134a in a domestic refrigeration system without doing any modifications to the system. The performance of the refrigerator was observed in terms of volumetric cooling capacity, blower discharge temperature, and coefficient of performance, refrigeration effect and energy consumption of a blower.

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Computational Fluid Dynamics Analysis of an Evaporative Cooling System

Cited by 13 publications

References 4 publications

Energy Analysis of HFC-152a, HFO-1234yf and HFC/HFO Mixtures as a Direct Substitute to HFC-134a in a Domestic Refrigerator

Energy Analysis of HFC-152a, HFO-1234yf and HFC/HFO Mixtures as a Direct Substitute to HFC-134a in a Domestic Refrigerator

HVAC Systems Heat Recovery with Multi-Layered Oscillating Heat Pipes

Thermodynamic Analysis of Low GWP Refrigerant Mixtures in a Refrigerator as Replacement to R-134A

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