Performance of A R22 split-air-conditioner when retrofitted with ozone friendly refrigerants (R410A and R417A)

2012 ◽  
Vol 23 (3) ◽  
pp. 16-22 ◽  
Author(s):  
Bukola Olalekan Bolaji
Keyword(s):  
Pressure Ratio ◽  
Coefficient Of Performance ◽  
Working Fluid ◽  
Air Conditioner ◽  
Performance Study ◽  
Alternative Refrigerants ◽  
Air Conditioners ◽  
Average Coefficient ◽  
Compressor Power ◽  
Discharge Pressure

R22 that has been used predominantly in air conditioning and in medium and low-temperature applications contains ozone depleting chlorine atoms and hence will be phased out eventually. This paper presents the experimental performance study of a split-air-conditioner using ozone friendly alternative refrigerants. The existing split-air-conditioner originally designed for R22 as the working fluid was retrofitted with R410A and R417A respectively, and the performance of the system was evaluated and compared with its performance when R22 was used. Experimental results showed that with R417A, the system had 1.9% higher refrigeration capacity and 14.2% lower with R410A when compared to that of R22. The average discharge pressure of the compressor obtained with R417A and R410A were 3.8% lower and 10.3% higher, respectively, than with R22. The lowest compressor power consumption and pressure ratio were obtained with the R417A retrofitted system. The average coefficient of performance (COP) obtained using R417A is 2.9% higher, while that of R410A is 8.4% lower than that of R22. Generally, with R417A the system consistently had the best performance in comparison to both R22 and R410A, indicating that R417A would be a better choice for retrofitting existing split-air-conditioners originally designed to use R22 as working fluid.

scholarly journals Experimental Investigation of a Split Air Conditioning Using Condensate as Direct Evaporative Cooling

2021 ◽  
Vol 86 (1) ◽  
pp. 140-153
Author(s):  
Azridjal Aziz ◽  
Muhammad Rif’at Syahnan ◽  
Afdhal Kurniawan Mainil ◽  
Rahmat Iman Mainil
Keyword(s):  
Air Conditioning ◽  
Evaporative Cooling ◽  
Cooling Capacity ◽  
Coefficient Of Performance ◽  
Cooling Load ◽  
Air Conditioner ◽  
Direct Evaporative Cooling ◽  
Compressor Power ◽  
Discharge Pressure ◽  
Air Conditioning Systems

Split air conditioning systems produce reasonable amount of condensate which is usually not utilized and thrown away to the environment. On the other hand, it consumes a lot of energy during operation. The aim of this study is to investigate the improvement of air conditioning systems performance utilizing condensate. A direct evaporative cooling using condensate is incorporated on a 0.74 ton-cooling capacity of split air conditioning to decrease the air temperature before entering the condenser. Performances of the split air conditioning with and without direct evaporative cooling are compared and presented in this paper. The results show that the use of direct evaporative cooling using condensate into the air before passing through the condenser reduces the compressor discharge pressure. The decrease of the condenser pressure led to 4.7% and 7% reduction of power consumption for air conditioner without cooling load and air conditioner with 2000 W cooling load, respectively. The cooling effect and coefficient of performance (COP) increase with the decrease of compressor power. The use of direct evaporative cooling with condensate into the air before entering the condensing system can enhance the system performance and protect the environment.

Alternative Refrigerants for Solar Absorption Air-Conditioning

2019 ◽  
Vol 28 (01) ◽  
pp. 2050001
Author(s):  
Nihel Chekir ◽  
Ali Snoussi ◽  
Ammar Ben Brahim
Keyword(s):  
Operating Conditions ◽  
Coefficient Of Performance ◽  
Hydrocarbon Mixture ◽  
Water Mixture ◽  
Air Conditioner ◽  
Alternative Refrigerants ◽  
Solar Absorption ◽  
Air Conditioners ◽  
A Value ◽  
Circulation Ratio

Three hydrocarbons are considered as refrigerants for solar absorption air-conditioner. The cooling plant is composed essentially of the absorption chiller and the solar system is simulated with three working pairs: propane/octane, butane/octane and iso-butane/octane. Results are compared to those of ammonia/water mixture at the same fixed operating conditions and assumptions. The main advantages of the investigated refrigerants are their similar cooling effect compared to ammonia with a coefficient of performance reaching 0.63 and their relatively low working pressures. Nevertheless, the circulation ratio for hydrocarbon mixture is higher compared to ammonia. Propane/octane working mixture seems to be suitable for solar absorption air-conditioners with some particular precautions. The heat required to drive the absorption system is provided by evacuated tubes solar collectors of 90[Formula: see text]m2, a value in agreement with commercialized solar absorption air-conditioner operating with ammonia.

scholarly journals Investigation on the improvement of car air conditioning system performance using an ejector

2018 ◽  
Vol 197 ◽  
pp. 08013
Author(s):  
Enang Suma Arifianto ◽  
Ega Taqwali Berman ◽  
Mutaufiq Mutaufiq
Keyword(s):  
System Performance ◽  
Test Procedure ◽  
Cooling Capacity ◽  
Coefficient Of Performance ◽  
Working Fluid ◽  
Refrigeration Cycle ◽  
Air Conditioner ◽  
Air Conditioning System ◽  
Compressor Work ◽  
R 134A

The purpose of this research is to know the improvement of car air conditioner system performance using an ejector. The study was conducted on a car engine with power 100 PS (74 kW) @ 5000 rpm. The test procedure is carried out under two conditions: the normal refrigeration cycle mode and the refrigeration cycle mode with the ejector. The working fluid used in the refrigeration cycle is R-134a. Performance data was measured on engine revolutions ranging from 1500 - 3000 rpm. Finally, the results showed that ejector usage on AC system generates an increase in the refrigeration effect and coefficient of performance (COP) of 25% and 22%, respectively. This has implications to better cooling capacity and compressor work that is lighter.

Research on the Application of Alternative Refrigerants R407C and R410A in Refrigeration-Type Compressed-Air Dryers

2014 ◽  
Vol 672-674 ◽  
pp. 1739-1742
Author(s):  
Hui Liu ◽  
Jin Hua Li ◽  
Hong Xiao
Keyword(s):  
Working Condition ◽  
Pressure Ratio ◽  
Environmentally Friendly ◽  
Compressed Air ◽  
Coefficient Of Performance ◽  
Refrigeration Cycle ◽  
Alternative Refrigerants ◽  
Percentage Points ◽  
Refrigeration Capacity ◽  
Air Dryer

The coefficient of performance (COP), the volumetric refrigeration capacity and the pressure ratio of refrigeration cycle were studied in a refrigeration-type compressed-air dryer using environmentally friendly refrigerants R410A and R407C and compared with those using R22. Study indicates that under the working condition of a refrigeration-type compressed-air dryer, COP using R410A is 3% higher than that using R407C, the volumetric refrigeration capacity using R410A is 50 percentage points higher than that using R407C and the pressure ratio of R410A is 10% less than that of R407C. COP using R410A equals 96% of that using R22 and the volumetric refrigerating capacity equals 147% of that using R22. COP using R407C is equal to 93% of that using R22 and the volumetric refrigerating capacity is equal to 97% of that using R22. R410A is a more appropriate alternative to R22 than R407C in a refrigeration-type compressed-air dryer.

Thermodynamic Analysis of Ejector as an Expansion Device on Split-Type Air Conditioner Using R410A as Working Fluid

2014 ◽  
Vol 493 ◽  
pp. 227-232 ◽  
Author(s):  
Kasni Sumeru ◽  
Henry Nasution ◽  
Farid Nasir Ani
Keyword(s):  
Numerical Modeling ◽  
Thermodynamic Analysis ◽  
Negative Impact ◽  
Capillary Tube ◽  
Coefficient Of Performance ◽  
Working Fluid ◽  
Air Conditioner

Typically the split-type air conditioner uses a capillary tube as expansion device. To enhance the performance of the system, an ejector can be applied as expansion device to replace capillary tube. Based on the numerical modeling, the coefficient of performance (COP) of standard cycle using R410A as working fluid was slightly lower than that of R22. The use of an ejector as an expansion device on a split-type air conditioner using R410 increased the COP by 10.8%. Also, R410A has a lower total GWP impact compared with R22, which reduce negative impact on the environment.

Performance Study of the Household Air Conditioner under Extreme Climate Conditions

2013 ◽  
Vol 860-863 ◽  
pp. 1607-1611
Author(s):  
Xin Zhao ◽  
Wei Ting Jiang ◽  
Wei Guo Pan ◽  
Jun Li ◽  
Su Liu ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Cooling Capacity ◽  
Air Conditioner ◽  
Outdoor Temperature ◽  
Performance Study ◽  
Climate Conditions ◽  
Air Conditioners ◽  
Extreme Climate ◽  
Outdoor Climate ◽  
Future Direction

This paper used physical modeling method to simulate the running state of each component of the air conditioner, got the ideal conditions of air conditionor energy consumption model and then calibrated and corrected the model of the air conditioner energy consumption by the experimental data. After utilizing the model for the performance analysis of the actual air conditioner, it was found that the extreme outdoor climate would affect the performance of the air conditioner. In summer, the electricity required to produce the same amount of cooling capacity will be 210% compared with 30°C of outdoor temperature, when the outdoor temperature is 50 °C; In winter, the drop of outdoor temperature will seriously impact on the energy efficiency of air conditioner, when the outdoor temperature is-5°C the electricity required to produce the same amount of cooling capacity will be 150% compared with 10 °C of outdoor temperature. It is of great significance that the results shown in this research contributes to the analysis of air conditioner in extreme conditions, and amended energy consumption of the model can not only forecast the performance of household air conditioners under the extreme climate but also indicate the future direction of air conditionersdesign and improvement.

scholarly journals Exergetic performance analysis of low GWP alternative refrigerants for R404A in a refrigeration system

2021 ◽  
Author(s):  
Mehmet Altinkaynak
Keyword(s):  
Cooling System ◽  
Operating Conditions ◽  
Coefficient Of Performance ◽  
Working Fluid ◽  
Refrigeration System ◽  
Alternative Refrigerants ◽  
Condenser Temperature ◽  
Parametric Analyses ◽  
Low Global Warming Potential ◽  
Very High

Abstract According to the regulation of European Union laws in 2014, it was inevitable to switch to low global warming potential (GWP) fluids in the refrigeration systems where the R404A working fluid is currently used. The GWP of R404A is very high, and the potential for ozone depletion is zero. In this study, energetic and exergetic performance assessment of a theoretical refrigeration system was carried out for R404 refrigerant and its alternatives, comparatively. The analyses were made for R448A, R449A, R452A and R404A. The results of the analysis were presented separately in the tables and graphs. According to the results, the cooling system working with R448A exhibited the best performance with a coefficient of performance (COP) value of 2.467 within the alternatives of R404A followed by R449A and R452A, where the COP values were calculated as 2.419 and 2.313, respectively. In addition, the exergy efficiencies of the system were calculated as 20.62%, 20.22% and 19.33% for R448A, R449A and R452A, respectively. For the base calculations made for R404A, the COP of the system was estimated as 2.477, where the exergy efficiency was 20.71%. Under the same operating conditions, the total exergy destruction rates for R404A, R448A, R449A and R452A working fluids were found to be 3.201 kW, 3.217 kW, 3.298 kW and 3.488 kW, respectively. Furthermore, parametric analyses were carried out in order to investigate the effects of different system parameters such as evaporator and condenser temperature.

scholarly journals Smart working fluid selection in refrigeration systems

2018 ◽  
Vol 54 (1) ◽  
Author(s):  
M.A. Petrenko ◽  
V. A. Mazur
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Fuzzy Optimization ◽  
Rankine Cycle ◽  
Coefficient Of Performance ◽  
Critical Parameters ◽  
Working Fluid ◽  
Alternative Refrigerants ◽  
Smart Working ◽  
Information Characteristics

The choice of trade-off working fluid in the reverse Rankine cycle was studied as a problem of fuzzy optimization. Three main criteria were chosen as objective functions: thermodynamic (COP – coefficient of performance), economic (LCC – cost of life cycle) and ecological (GWP - global warming potential). The control variables (X) were considered as information characteristics of the working fluid. Critical parameters and a normal boiling point represented the latter. A sustainable solution that implements a compromise between the criteria based on information technology, defines a "smart" working fluid. The local criteria were expressed through the thermodynamic properties restored from the information characteristics of the working fluid X. The life cycle cost of the refrigeration system was calculated according to standard economic ratios. GWP values were selected from the refrigerant database. The class of substances considered is represented by possible alternative refrigerants for replacing R410A.

scholarly journals Performance characteristics of low global warming potential R134a alternative refrigerants in ejector-expansion refrigeration system

2016 ◽  
Vol 37 (4) ◽  
pp. 55-72
Author(s):  
Shubham Mishra ◽  
Jahar Sarkar
Keyword(s):  
Cooling Capacity ◽  
Area Ratio ◽  
Coefficient Of Performance ◽  
Air Conditioner ◽  
Refrigeration System ◽  
Alternative Refrigerants ◽  
Entrainment Ratio ◽  
Maximum Improvement ◽  
Maximum Coefficient ◽  
Volumetric Cooling

AbstractPerformance assessment of ejector-expansion vapor compression refrigeration system with eco-friendly R134a alternative refrigerants (R152a, R1234yf, R600a, R600, R290, R161, R32, and propylene) is presented for air-conditioning application. Ejector has been modeled by considering experimental data based correlations of component efficiencies to take care of all irreversibilities. Ejector area ratio has been optimized based on maximum coefficient of performance (COP) for typical air-conditioner operating temperatures. Selected refrigerants have been compared based on area ratio, pressure lift ratio, entrainment ratio, COP, COP improvement and volumetric cooling capacity. Effects of normal boiling point and critical point on the performances have been studied as well. Using ejector as an expansion device, maximum improvement in COP is noted in R1234yf (10.1%), which reduces the COP deviation with R134a (4.5% less in basic cycle and 2.5% less in ejector cycle). Hence, R1234yf seems to be best alternative for ejector expansion system due to its mild flammability and comparable volumetric capacity and cooling COP. refrigerant R161 is superior to R134a in terms of both COP and volumetric cooling capacity, although may be restricted for low capacity application due to its flammability.

Numerical Study of Ejector as an Expansion Device in Split-Type Air Conditioner

2013 ◽  
Vol 388 ◽  
pp. 101-105 ◽  
Author(s):  
Kasni Sumeru ◽  
Nasution Henry ◽  
Farid Nasir Ani
Keyword(s):  
Capillary Tube ◽  
Numerical Study ◽  
Geographical Area ◽  
Numerical Approach ◽  
Cooling Capacity ◽  
Coefficient Of Performance ◽  
Working Fluid ◽  
Air Conditioner ◽  
Constant Area ◽  
Condenser Temperature

This paper presents a numerical approach for determining the motive nozzle and constant-area of an ejector as an expansion device, based on cooling capacity of the split-type air conditioner using R22 as working fluid. The use of an ejector as an expansion device in split-type air conditioner can enhance the coefficient of performance (COP) system. Typically, the split-type air conditioner may be installed on the geographical area with moderate or high outdoor air temperature using capillary tube. For this reason, the motive nozzle and constant-area diameters of the ejector must be designed according to these conditions. The diameters of the ejector are crucial in improving the COP. The results showed that the motive nozzle diameter is constant (1.14 mm) with variations of the condenser temperature, whereas the constant-area diameter decreases as the condenser temperature increases.

Sign in / Sign up

Export Citation Format

Share Document