Performance investigation of ozone-friendly R404A and R507 refrigerants as alternatives to R22 in a window air-conditioner

Bolaji, Bukola Olalekan

doi:10.1016/j.enbuild.2011.08.011

Cited by 56 publications

(24 citation statements)

References 12 publications

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“…Although vapor compression refrigeration is a highly researched topic, surprisingly very little research has been devoted to simulation and energy efficiency improvement of WACs in the open literature [8][9][10][11][12][13], while a few studies are devoted to investigating alternative refrigerants for WACs [14][15][16][17][18]. One efficiency enhancement option investigated in the literature [8,9] involved application of evaporative wet cooling media pads to the WAC condenser.…”

Section: Introductionmentioning

confidence: 99%

High efficiency novel window air conditioner

Bansal

2015

Applied Energy

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h i g h l i g h t sUse of novel refrigerant mixture of R32/R125 (85/15% molar conc.) to reduce global warming and improve energy efficiency. Use of novel features such as electronically commuted motor (ECM) fan motor, slinger and sub-merged sub-cooler. Energy savings of up to 0.1 Quads per year in USA and much more in Asia/Middle East where WACs are used in large numbers. Payback period of only 1.4 years of the novel efficient WAC. a b s t r a c tThis paper presents the results of an experimental and analytical evaluation of measures to raise the efficiency of window air conditioners (WAC). In order to achieve a higher energy efficiency ratio (EER), the original capacity of a baseline R410A unit was reduced by replacing the original compressor with a lower capacity but higher EER compressor, while all heat exchangers and the chassis from the original unit were retained. Subsequent major modifications included -replacing the alternating current fan motor with a brushless high efficiency electronically commutated motor (ECM) motor, replacing the capillary tube with a needle valve to better control the refrigerant flow and refrigerant set points, and replacing R410A with a 'drop-in' lower global warming potential (GWP) binary mixture of R32/R125 (85/15% molar concentration). All these modifications resulted in significant enhancement in the EER of the baseline WAC. Further, an economic analysis of the new WAC revealed an encouraging payback period.

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Section: Introductionmentioning

confidence: 99%

High efficiency novel window air conditioner

Bansal

2015

Applied Energy

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“…Mota‐Babiloni et al conducted an experimental evaluation of R‐448A and R‐404A as lower global warming potential (GWP) alternatives in refrigeration systems. Bolaji investigated the performance of ozone‐friendly, R‐404A and R‐507 refrigerants as alternatives to R‐22 in a window air conditioner. Kuntha and Kiatsiriroat studied boiling heat transfer coefficient of R‐22 refrigerant and its alternatives in horizontal tube for small refrigerator scale.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the effect of superheating on the performance of a refrigeration system using low temperature different refrigerant blends in porous media

Tarawneh

Jawarneh

Tlilan

et al. 2019

Heat Trans. Asian Res.

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A comparative experimental investigation on the effect of superheating of R‐22, R‐404A, R‐407C, and R‐422A as low‐temperature refrigerant blends on the performance of a vapor compression refrigeration system is conducted. Empty and porous evaporators with porosities of (40%, 43%, and 45%) are used during the tests, to predict good alternatives to the refrigerant R‐22, which has high ozone depletion potential and high global warming potential. Condensation, evaporation temperatures, degree of subcool are kept constants at 40°C, −26°C, and 6°C (±0.5°C), respectively. The effect of superheating on the compressor discharge temperature, evaporating pressure drop, evaporating capacity, volumetric refrigeration capacity and coefficient of performance (COP) of these refrigerants has been analyzed. Refrigerants, R‐422A and R‐404A showed greater performances than that of R‐22. The percentages of increase in evaporation capacities of R‐407c, R‐22, R‐404A, and R‐422A are approximately 144%, 168%, 146.3%, and 161.5%, respectively, when changing the degrees of superheat from 6°C to 16°C and changing the porosity from empty evaporator to 40%. The percentages of increase in COP are approximately 319%, 320%, 312%, and 350%, respectively. The percentages of increase in evaporation capacities of R‐422A and R‐404A when compared with R‐22 under the same conditions are 18.6% and 8.8%, respectively, while the percentages of increase in COP when compared with R‐22 are 17% and 12%, respectively.

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“…Although vapor compression refrigeration is a highly researched topic, surprisingly very little research has been devoted to the energy efficiency improvement of WACs in the open literature [Goswami et al (1993), Hajidavalloo (2007), Naphon (2010), Sawant et al (2011)], while a few studies were devoted to investigating alternative refrigerants for WACs , Bolaji (2011), Devotta et al (2005, Jabaraj et al (2006). One of the efficiency enhancement option used in the literature [Goswami et al (1993), Hajidavalloo (2007)] included evaporative wet cooling media pads on the condenser of window-air-conditioner that resulted in the reduction of power consumption of the WAC by about up to 20%.…”

Section: Introductionmentioning

confidence: 99%

High Efficiency Room Air Conditioner

Bansal

2015

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Performance investigation of ozone-friendly R404A and R507 refrigerants as alternatives to R22 in a window air-conditioner

Cited by 56 publications

References 12 publications

High efficiency novel window air conditioner

High efficiency novel window air conditioner

Investigation of the effect of superheating on the performance of a refrigeration system using low temperature different refrigerant blends in porous media

High Efficiency Room Air Conditioner

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