Efficient Method to Reduce Power Consumption in Air-Conditioning System of Warehouses

2021 ◽  
pp. 173-183
Author(s):  
R. Sujatha ◽  
Sivakumar Subramaniam ◽  
Sharath Cherian Thomas ◽  
Eknoor Oberoi ◽  
Achint Mathews
Keyword(s):  
Power Consumption ◽  
Efficient Method ◽  
Air Conditioning ◽  
Air Conditioning System ◽  
Reduce Power Consumption

scholarly journals Energy Saving in Split Air Conditioner using Evaporative Cooling Pad at the ODU

2019 ◽  
Vol 9 (1) ◽  
pp. 1858-1862
Keyword(s):  
Power Consumption ◽  
Performance Improvement ◽  
Air Conditioning ◽  
Evaporative Cooling ◽  
Cooling Capacity ◽  
Air Conditioner ◽  
Optimum Thickness ◽  
Outdoor Air ◽  
Air Conditioning System ◽  
Overall Performance

The objective of the study is to investigate the performance improvement in a split air conditioning system using evaporative cooling pads at ODU (outdoor unit) and to determine optimum thickness and material of the cooling pad. For this purpose experiments were conducted on 0.8 TR capacity split air conditioner charged with refrigerant R-22. For comparison experiments were performed with and without evaporative cooling pad. The effect of the different cooling pad material and thickness on the overall performance of split air conditioner is experimentally found by measuring cooling capacity and the power consumption of the system including water circulation pump. From the experimental work it is found that the cellulose cooling pad gives the best results among the selected materials. Split air conditioner coupled with cellulose cooling pad of 100 mm thickness at ODU results in to 13.8% increase in overall COP, 9.5 % reduction in power consumption and 5.1 % increase in cooling capacity at 35°C DBT and 32% relative humidity outdoor air condition.

scholarly journals Energy-focused substantiation of the choice of an air conditioning system for an office and shopping building

2021 ◽  
Vol 11 (2) ◽  
pp. 38-45
Author(s):  
Anastasiya A. Frolova ◽  
◽  
Pavel I. Lukhmenev ◽  
Keyword(s):  
Power Consumption ◽  
Air Conditioning ◽  
Large Scale ◽  
Cooling System ◽  
Air Cooling ◽  
Outdoor Temperature ◽  
Cooling Systems ◽  
Air Conditioning System ◽  
Northern Areas ◽  
Conventional Cooling

Introduction. The air conditioning system is the main consumer of electricity inside office and shopping buildings. The coo­ling needs arise inside such buildings all over the year due to high amounts of heat emitted by people and equipment (computers, office equipment, cash registers), solar radiation (the envelopes of the majority of these buildings have continuous glazed facades) and sources of artificial lighting. A conventional cooling system has a compressor and condensers. The most important step towards an optimized and low-energy cooling system is the abandonment of compressor and condensers; in addition, the cold extracted from the outdoor air, is used in the system. This cooling technique is called an atmospheric co­oling system. The climatic features of Russia allow for a large-scale application of the cooling technology that uses natural cold. However, for a start, a decision was made to focus on a central region of the Russian Federation, namely, Moscow, rather than any northern areas of the country. Materials and methods. The problem is solved by the calculation method applied to the case of a 35-storey office building in Moscow. Various outdoor temperature options were considered as the bases for a transition to an atmospheric cooling system. The co-authors also compare different installation options for dry coolers, which in turn affect the routing length of refrigeration circuits. The annual demand for cold is calculated for all analyzed options. Results. Some results are presented in the form of tables of annual energy consumption by different types of air cooling systems. Conclusions. The co-authors have found that the location of dry coolers strongly affects the power consumption by a co­oling system. Power consumption by cooling systems was analyzed, and it was found out that transition to machine refrigeration at the higher outdoor temperature of +8 °C is more efficient from the standpoint of energy efficiency than the same transition at +5 and 0 °C.

3D Modelling and Analysis Flow of Air Conditioner Outdoor Fan for Cost Reduction

2011 ◽  
Vol 264-265 ◽  
pp. 1568-1573 ◽  
Author(s):  
Seung Hyun Choi ◽  
Jae Yeol Kim
Keyword(s):  
Power Consumption ◽  
Noise Level ◽  
Cost Reduction ◽  
Air Conditioning ◽  
3D Modelling ◽  
Air Conditioner ◽  
Axial Fan ◽  
Automobile Engine ◽  
Air Conditioning System ◽  
The Cost

Spread of household air conditioning system is continued to be increased. Along with the spread, the acknowledgement on product quality by the customer is increasing. Therefore, not only basic performances like cooling and power consumption but also design and noise level of in-house and external unit become the important factors. Axial fan in the external unit of air conditioning system is for ventilation and air supplying unit, and the related products have been widely adopted as household electronics, automobile engine, big sized blower in factory, tunnel, and subway. In this study, commercial 3-winged propeller fan from S company is modified to 2-winged fan for the cost reduction. Using 3D modelling, the fan shape is modified, and analysis flow is adopted to provide the way to reduce cost while maintaining the same wind capacity.

scholarly journals Experimental investigation on the performance of residential air conditioning system using water condensate for subcooling

2018 ◽  
Vol 197 ◽  
pp. 08002
Author(s):  
Kasni Sumeru ◽  
Triaji Pangripto Pramudantoro ◽  
Andriyanto Setyawan
Keyword(s):  
Experimental Investigation ◽  
Power Consumption ◽  
Air Conditioning ◽  
Cooling Capacity ◽  
Working Fluid ◽  
Air Conditioning System ◽  
Residential Air Conditioning ◽  
Indoor And Outdoor

The experimental investigation of subcooling effects on system COP was carried out on a residential air conditioning using R410A as working fluid, with a compressor capacity of about 0.75 kW. In the experiment, the indoor and outdoor temperatures were controlled at 24°C and 32°C. The results showed that the use of condensate water lowers the refrigerant temperature in the condenser outlet by 2.7°C. By lowering the refrigerant temperature, the cooling capacity of the air conditioning can be enhanced. The decrease in of refrigerant temperature results in COP improvement 16.4%. Besides increasing the COP, the condensate water also decreases the discharge compressor temperature by 7.6°C. The decrease in of the discharge compressor temperature resulted in the decrease in power consumption of the air conditioning system by 5.9%.

DEVELOPMENT AND EVALUATION OF AN AUTOMOTIVE AIR-CONDITIONING TEST RIG

2016 ◽  
Vol 78 (10-2) ◽  
Author(s):  
Ahmad Zulkhairie Amran ◽  
Zulkarnain Abdul Latiff ◽  
Henry Nasution ◽  
Mohd Rozi Mohd Perang ◽  
Hishammudin Mohd Jamil ◽  
...  
Keyword(s):  
Power Consumption ◽  
Air Conditioning ◽  
Coefficient Of Performance ◽  
Refrigeration System ◽  
Test Rig ◽  
Air Conditioning System ◽  
Variable Parameters ◽  
Automotive Air Conditioning ◽  
Air Flow Velocity ◽  
Compressor Power

To evaluate an air-conditioning system performance on board is quite cumbersome and tedious process due to the limitation of space in the engine compartment. This paper presents the process of designing and the result from the automotive refrigeration system simulation that have been integrated into the test rig. To perform the test on automotive refrigeration simulator the location for the temperature measurement selected and thermocouples were installed. The locations of the temperature probes are at the inlet and outlet of compressor, condenser outlet and the inlet of the evaporator. The gas pressure was measured at low and high pressure sides located at evaporator outlet and receiver-drier respectively. The test results were analyzed using the properties table of the refrigerant used. The coefficient of performance (COP), cooling load of the system and compressor power consumption were determined. The variable parameters used are the evaporator blower speed and the air velocity passes through the condenser. The experimental results obtained show that increasing the blower speed will reduce the COP of the refrigeration system. The maximum COP of the system is 4.3 at the lowest evaporator blower speed. The power consumption will be reduced when the air flow velocity through the condenser is increased from 0, 40, 50, 60, 70 km/h respectively.

Application of Genetic Programming Method Combined with Neural Network in HVAC Optimal Operation

2014 ◽  
Vol 548-549 ◽  
pp. 1030-1034 ◽  
Author(s):  
Ching Wei Chen ◽  
Yung Chung Chang ◽  
Wei Ting Liao ◽  
Cheng Wen Lee
Keyword(s):  
Genetic Programming ◽  
Power Consumption ◽  
Air Conditioning ◽  
Optimal Parameter ◽  
Optimal Operation ◽  
Cooling Load ◽  
Air Conditioning System ◽  
Minimum Power ◽  
Iterative Computation ◽  
Minimum Power Consumption

This study records the various air conditioning system parameters that affect power consumption and establishes system power consumption models for the chiller, the secondary chilled water pump, the air handling unit (AHU), and the cooling load of the AHU using artificial neural networks. The R2 for each of the models are as high as 0.996. Estimations for the AHU loads in the spaces where the cooling load for the AHU are satisfied and genetic programming is used to find the optimal air conditioning system parameter set for achieving minimum power consumption. These power consumption values are then set as genetic programming end points, and the mathematical symbol (+) is used as the functional ends. Finally, the computational elements of genetic programming are used to perform iterative computation. It may be concluded from the results of the experiment that the optimal parameter set obtained from the genetic programming-based search result in a minimum power consumption that complies with the loading requirements of the location of installation result in a 22% savings in term of power consumption and an average COP increase of approximately 28%, which represent very significant improvements.

scholarly journals Effect of Using Air Guide Net in Front of the Condenser on the Performance of Automobile Air Conditioning System

2019 ◽  
Vol 15 (2) ◽  
pp. 89-99
Author(s):  
Mahmoud Maustafa Mahdi ◽  
A. A. Gaddoa
Keyword(s):  
Heat Transfer ◽  
Power Consumption ◽  
Experimental Work ◽  
Air Conditioning ◽  
Electrical Energy ◽  
Air Conditioning System ◽  
Automobile Air Conditioning System ◽  
Inclination Angles ◽  
Air Passage ◽  
Automobile Air Conditioning

  The work of this paper is an investigation to improve the condenser performance of the automobile air conditioning system by enhancing the air-side heat transfer from the condenser through the use of an air guide net installed in front of the condenser face which is basically an aluminum plate having a circular entrance shape for the air passage.  The A/C system was examined under two types of test. The first test was conducted the air guide net, while the second was done with the air guide net. The performances of the A/C system under these tests were compared. For the second type of test, the experiment was carried out with three different size of air guide net, three different circular diameters (2, 3 and 3.5 cm) and a common air passage area. The effect of varying the size of the air guide net and its inclination angle was investigated. The experimental work included five inclination angles (0o, 5o, 10o, 15o and 20o). It was found that the presence of the air guide net caused an improvement in the performance of the A/C system for all sizes and inclination angles.  In addition, the electrical energy consumed by the A/C system without the air guide net was calculated and compared to those obtained for the A/C system with the air guide net. The results manifested that the reduction of the power consumption was enhanced by operating the A/C system with the air guide net. 

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