Development of a Chest Freezer – Optimum Design of an Evaporator Coil

Radha, K. Kalyani; Sarada, S. Naga; Rajagopal, K. R.

doi:10.15282/ijame.5.2012.6.0047

Cited by 5 publications

(5 citation statements)

References 13 publications

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“…This shows that the developed subcooled system has 141% faster cooling rate than the main system. This typical behavior is similar to those observed in the studies of Nasir et al [2] and Kalyani et al [12].…”

Section: Working Principle Of the Ivcr Systemsupporting

confidence: 91%

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COP enhancement of vapour compression refrigeration system using dedicated mechanical subcooling cycle

Mogaji¹,

Awolala²,

Ayodeji³

et al. 2020

Nig. J. Tech.

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This study focused on development of an improved vapour compression refrigeration system (IVCR system). Dedicated mechanical subcooling cycle is employed in attaining the developed IVCR system. The system is composed of two cycles cascade refrigeration system working with R134a. It consists of a rectangular shape with total storage space of 0.582 m3, made of galvanized mild steel and internally insulated with 0.05 m polystyrene foam. Tests under a wide range operating temperature conditions were carried out on the developed IVCR system. Performance evaluation of the system was characterized in terms of cooling capacity and coefficient of performance (COP). Experimental results showed that the COP of the subcooled system improved better than that of the main system from 18.0% to about 33.5% over an evaporating temperature range of -10 to 30oC. It can be concluded that the use of dedicated sub cooling cycle in VCR system is more efficient and suitable for the betterment of thermal system performance. Keywords: Vapour compression Refrigeration system, Coefficient of performance, dedicated subcooled system, Condensation temperature, Evaporation temperature.

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Section: Working Principle Of the Ivcr Systemsupporting

confidence: 91%

“…Where, Csub Q and sub P are obtained using Eqns. (11) and (12) respectively. Thus, performance improvement of the system is obtained using Eq.…”

Section: = (18)mentioning

confidence: 99%

COP enhancement of vapour compression refrigeration system using dedicated mechanical subcooling cycle

Mogaji¹,

Awolala²,

Ayodeji³

et al. 2020

Nig. J. Tech.

View full text Add to dashboard Cite

show abstract

“…According to R134a refrigerant, ozone depletion potential was 0, global warming potential was 0.27, daily energy consumption was 4.25 kWh, mass flow rate was 0.0012 kg/h and COP value was 8.42. As a result of the calculations, it was seen that R134a provided more performance than R12 refrigerant [11].…”

Section: Introductionmentioning

confidence: 93%

An Experimental Study Towards Decreasing the Energy Efficiency Index Value in Industrial Refrigerators

Bahar

Erten

Aktaş

2021

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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Energy labeling is performed according to the energy efficiency index (EEI) value in industrial refrigerators. In order to reduce the EEI value calculated according to the amount of energy consumed and the characteristics of the cooler, two systems were designed in this study and the energy label class of the coolers was determined according to the results obtained. Two systems were designed in this study and the energy label class of the refrigerators was determined according to the obtained results. In this study, two different refrigerators (Type 1 and Type 2) were designed, manufactured and tested. The systems are designed using R290 (propane). It is a new generation natural and environmentally friendly refrigerant with two inlet-outlet evaporators, double condensers and double compressors that provide a homogeneous refrigeration. During the experiments, temperature-pressure measurements of the cooled products and refrigeration system equipment were taken from certain points every minute and test data were recorded. In the experiments, the average air temperature and relative humidity values of the test chamber of the experiment with resistance glass in the Type 1refrigerator were measured as 25 o C and 59,09%, respectively, the average air temperature and relative humidity values of the test room of the Type 2 system experiment with antifogging film were measured as 25,231 o C and 57,207%, respectively. In the experiments, defrosting process was carried out twice a day in the refrigerators. During the experiment, the highest and lowest average temperatures of the cooled products were measured as -16,18 o C and -19,40 o C. Increasing product temperatures during defrosting and stopping cooling increased the power consumption in the system. As a result of the calculations, the energy efficiency index value of the Type 1 resistance model was calculated to be 60,53 and it was seen that the energy label was class "E". In the Type 2 model in which anti-fog coating film is used, the energy efficiency index value is 49,25 and it has been observed that the energy label is class "D".

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“…The highest exergy loss rate was in the compressor, and the lowest was in the throttling device for all refrigerants. Radha et al [7] tested a 400-l chest freezer using the refrigerant R134a. The cooling load estimates the needed compressor capacity.…”

Section: Introductionmentioning

confidence: 99%

Exergy Analysis of Chest Freezer Working with R-134a and R-600a at Steady State Conditions

Ali¹,

Mahdi²

2023

IJEPM

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In the present work, exergy analysis has been experimentally evaluated for a chest freezer to assist in sizing calculations and selecting the most suitable working fluid, which can reduce the power consumption. In the present work, exergy analysis has been experimentally evaluated for a chest freezer to assist in sizing calculations and selecting the most suitable working fluid to reduce power consumption. The experimental measurements were carried out using a 150 litters chest freezer volume capacity running on R-134a and R-600a using different compressors. The freezer provides measurement instruments for pressure, temperature, refrigerant mass flow and power consumption. The tests were carried out with a standard ambient temperature of 32. The results show that the evaporator had the highest exergy loss value of 59% for R-134a and 62% for R-600a. Compressor exergy losses are 64% for R-134a and 63% for R-600a. The condenser showed exercise losses of 79% for R-134a and 75% for R-600a, while the limitation device (capillary tube) had exercise losses of 87% for R134a and 99.5% for R-600a. The thermal performance of the chest freezer represented by the second low efficiency is 43% for R-134a and 50% for R-600a. The thermal performance of the freezer with R-600a is better than R-134a due to the energy consumption reducing and evaporator behaviour.

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Development of a Chest Freezer – Optimum Design of an Evaporator Coil

Cited by 5 publications

References 13 publications

COP enhancement of vapour compression refrigeration system using dedicated mechanical subcooling cycle

COP enhancement of vapour compression refrigeration system using dedicated mechanical subcooling cycle

An Experimental Study Towards Decreasing the Energy Efficiency Index Value in Industrial Refrigerators

Exergy Analysis of Chest Freezer Working with R-134a and R-600a at Steady State Conditions

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