Refrigeration effect and energy efficiency ratio (EER) calculation of 1/2 cycle refrigeration system on LPG-fueled vehicles

Setiyo, Muji; Purnomo, Bagiyo Condro; Waluyo, Budi; Syaka, Darwin Rio Budi; Hamidi, Nurkholis

doi:10.1088/1757-899x/403/1/012087

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…From the Ph R-22 diagram above by entering temperature (T) in °C and pressure (P) in absolute bars, the magnitude of enthalpy of each point is as follows: h1 = 402 kj/kg h2 = 443 kj/kg h3 = 238 kj/kg h4 = 238 kj/kg h5 = 238 kj/kg h6 = 402 kj/kg h7 = 400 kj/kg h8 = 400 kj/kg After the enthalpy value is obtained, a calculation is carried out to find the performance value using a formula that is in accordance with the Refrigeration Effect formula as follows [21,22].…”

Section: Calculation Of Basic Refrigerator Simulation Performance Wit...mentioning

confidence: 99%

The Effect of Cooling Load Variations on Basic Refrigerator Simulation Performance

Baliarta,

Yusuf

2024

AJMIE

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The working principle of the cooling machine is to transfer heat from a place / material with a low temperature to another place / material with a higher temperature. Refrigeration technology is very closely related to modern life, and also the convenience of life. Currently, refrigeration machine innovation is very rapid development, one of which is a basic refrigerator simulation machine. For testing carried out for 1.5 hours with data collection for 5 minutes using variations in lamp loads, so that the data obtained from the test process in the basic refrigerator simulation with two evaporators include: Temperature, pressure, electric current, voltage, Cos φ and the length of the test process, the COP (Coefficient of Performance) and input power needed can be calculated. The resulting temperature in box 1 (freezer) is -5.5°C in the 14th minute and in box 2 (chiller) is 8°C. The relationship between the cooling load and the COP of the system forms a parabolic curve, where the largest COP position is found at a load between 50 watts to 75 watts, and then the COP of the system decreases. The decrease in temperature of evaporator box 2 (chiller) is longer than the temperature of box 1 (freezer), this is because on the exit side of evaporator box 2 (chiller) installed EPR valve (evaporator pressure regulator) where this valve functions to hold the temperature of the evaporator.

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Section: Calculation Of Basic Refrigerator Simulation Performance Wit...mentioning

confidence: 99%

The Effect of Cooling Load Variations on Basic Refrigerator Simulation Performance

Baliarta,

Yusuf

2024

AJMIE

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“…In the context of using an AC system, refrigerant charging pressure has an important role that can significantly influence AC performance. Some of the impacts of variations in refrigerant charging pressure in AC include the AC's ability to lower the temperature or cool the room in the car cabin [1], the influence on AC system performance which is greater with greater suction pressure, as well as the relationship between lower refrigerant pressure and reduced cooling results [2][3] [4]. In addition, inappropriate refrigerant pressure, either too high or too low, can have a serious impact on the optimal performance of the AC, causing the compressor to work hard, and damaging AC system components such as the evaporator, condenser, and hoses [5].…”

Section: Introductionmentioning

confidence: 99%

The effect of refrigerant filling pressure on split AC performance with variations in refrigerant R22, R134A, and R290

Nugroho,

Alfianto,

Priangkoso

2024

jttm

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R-22 refrigerant has been recognized as a major cause of climate change and ozone layer depletion, leading to increased interest in finding more environmentally friendly alternatives. Two alternatives being considered are R-134a and R-290. The main objective of this research is to compare the Coefficient of Performance (CoP) performance of split ACs using three types of refrigerants, namely R-22, R-134a, and R-290, taking into account the environmental impact and operational efficiency. The research method involved retrofitting a 1 PK split AC which initially used R-22 with three different types of refrigerant as an experiment. The research process includes test equipment design, equipment installation, and feasibility testing before carrying out experimental testing. Tests were carried out with variations in refrigerant charging pressure of 70 psi, 75 psi, 80 psi, 85 psi, and 90 psi. The research results showed that the largest COP was found in the R-290 refrigerant, reaching a value of 0.86 at a filling pressure of 90 Psi. The largest COP value for R-22 was also found at a filling pressure of 90 psi, namely 0.66. Meanwhile, R-134a achieved the highest COP value at a filling pressure of 90 psi, with a value of 0.57 at a variation of refrigerant filling pressure of 90 Psi. In conclusion, this study provides better insight into the efficiency and environmental impact of the three types of refrigerants discussed. It also provides a useful information basis for the selection of suitable refrigerants in split air conditioning systems, with the aim of environmental conservation and achieving optimal performance

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Thermal analysis and development of PID control for electronic expansion device of vapor compression refrigeration systems

Franco

Guerrero

Ochoa

et al. 2022

Applied Thermal Engineering

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Refrigeration effect and energy efficiency ratio (EER) calculation of 1/2 cycle refrigeration system on LPG-fueled vehicles

Cited by 3 publications

References 5 publications

The Effect of Cooling Load Variations on Basic Refrigerator Simulation Performance

The Effect of Cooling Load Variations on Basic Refrigerator Simulation Performance

The effect of refrigerant filling pressure on split AC performance with variations in refrigerant R22, R134A, and R290

Thermal analysis and development of PID control for electronic expansion device of vapor compression refrigeration systems

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