Experimental evaluation on the use of capillary tube and thermostatic expansion valve with heat recovery hot spot water heater in air source refrigeration system

et al. 2021

ARFMTS

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.

Section: Methodology 21 Experimental Methods Designmentioning

confidence: 99%

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

Aziz

Syahnan

et al. 2021

ARFMTS

Journal of Engineering Sciences and Information Technology

“…Therefore, cooling systems will continue to try to use less energy, which will increase overall energy efficiency [1]. By lowering the condenser and evaporator pressure differential, boosting condenser heat rejection capability, and decreasing compressor power consumption, air conditioning machines can consume less energy [2][3][4][5]. It is also thought that experiments are used to study the performance of split-unit air conditioning systems.…”

Section: Ntroductionmentioning

confidence: 99%

دراسة تجريبية ونظرية لتحسين أداء المكيف في العراق

جاسم¹,

جاسم²

2022

In air conditioning cooling systems, especially in regions with extremely hot weather, reducing power consumption and improving performance are key concerns. In the summer, the system's efficiency drastically declines and its use of electricity significantly rises. This article analysis an experimental and theoretical study to improve the performance of evaporative condensers used in air conditioning using evaporative cooled air. The paper mainly focuses on the energy consumption of residential cooling systems and their performance improvement in Iraq. The result shows that when the air entering the condenser is cooled via evaporative cooling, the average compressor work consumption is lowered by 8.2% as a result of the 5% drop in condenser pressure. The highest temperature at the condenser's air outlet surface was lowered by 5 C when evaporative-cooled condensers were utilized, and power consumption was found to be decreased by 13.7 to 58%.

“…Therefore, a continuous energy-saving effort from cooling systems will contribute to worldwide energy efficiency [3][4][5][6]. Reduction of energy used for air conditioning units can be made by reducing compressor power consumption, increasing condenser heat rejection capacity, and lowering the condenser and evaporator pressure difference [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Performance Enhancement of Split Air Conditioner During Evaporative Cooling Application

Sulaiman

et al. 2021

ARFMTS

The increase of condenser temperature and pressure in air-conditioning leads to decreased cooling capacity and the increase of power consumption. Evaporative cooling could improve the thermal performance of the system. In this study, the evaporative cooling module was installed before the condenser to reduce the inlet air temperature to the condenser unit. The impact of condenser air temperature on the air conditioning system's overall performance was determined by varying the cooling pad discharge water flowrate of 880, 1040, and 1200 mL/min. The cooling load of 2000 W was employed in this experiment. The obtained results were compared with the air conditioning without an evaporative cooling module. It shows that the coefficient of performance (COP) increases with the increase of discharge water flow rate. The highest COP obtained is 7.09 at the flow rate of 1200 mL/min. The compressor work reduces about 6.57 % as compared with the air conditioner without evaporative cooling application. Besides, the COP increases by 12. 95 % at the highest flow rate.