scholarly journals Study by the numerical method of increasing the efficiency of falling ventilation jets for a channel compact air conditioning system

2020 ◽  
Vol 17 (6) ◽  
pp. 164-170
Author(s):  
V. R. Taurit ◽  
◽  
I. I. Sukhanova ◽  
A. N. Kolosnitsyn ◽  
◽  
...  
Keyword(s):  
Energy Consumption ◽  
Numerical Method ◽  
Temperature Difference ◽  
Air Conditioning ◽  
Initial Temperature ◽  
Air Conditioning System ◽  
Air Conditioning Systems ◽  
Reducing Energy

The problem of significantly reducing the consumption of ventilation air in ducted air conditioning systems by optimizing the efficiency of the air distributor is solved. Unconventional falling non-isothermal jets are experimentally investigated by numerical method with the identification of the structure features and determination of the calculated coefficients m and n according to the proposed methodology. The possibilities of reducing energy consumption by increasing the initial temperature difference of the supply duct air are shown.

Energy Conservation Analysis for Air Conditioning System in Rail Transit Stations

2014 ◽  
Vol 494-495 ◽  
pp. 1674-1677
Author(s):  
Bing Xu ◽  
Fang Hong Yuan ◽  
Bao Guo Zheng ◽  
Zhong Jin Shi ◽  
Yi Huan Hu
Keyword(s):  
Energy Consumption ◽  
Energy Conservation ◽  
Energy Saving ◽  
Control Strategy ◽  
Air Conditioning ◽  
Rail Transit ◽  
Air Conditioning System ◽  
Conservation Analysis ◽  
Air Conditioning Systems ◽  
Reducing Energy

This article discusses energy conservation for air conditioning systems in rail transit stations. At first, the paper analyzes the energy consumption condition in the air conditioning systems in rail transit stations. Then, it discusses application of appropriate control strategy for reducing energy consumption. In the end, the paper calculates effiency and amount of the energy saving based on the control strategy.

Effect of Air Conditioning Position on Thermal Comfort in the Floor Air Conditioning System

2014 ◽  
Vol 493 ◽  
pp. 74-79
Author(s):  
Y.A. Sabtalistia ◽  
S.N.N. Ekasiwi ◽  
B. Iskandriawan
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Energy Consumption ◽  
Thermal Comfort ◽  
Energy Efficient ◽  
Air Conditioning ◽  
Air Conditioning System ◽  
Air Supply ◽  
Air Conditioning Systems ◽  
Air Diffusion

Energy consumption for air conditioning systems (air conditioning system) increased along with the increasing need for fresh air and comfortable in the room especially apartments. FAC system (Floor Air Conditioning) is growing because it is more energy efficient than CAC (Ceiling Air Conditioning) system. However, the position of the AC supply is on the lower level at the FAC system causes draft discomfort becomes greater as air supply closer to the occupants so that thermal comfort can be reduced. Heat mixture of windows, exterior walls, kitchen, and occupants in the studio apartment affect thermal comfort in the room too.This study aims to determine the position of the AC supply which has the best thermal comfort of FAC system in the studio apartment. It can be done by analyzing ADPI (Air Diffusion Performance Index), the distribution of air temperature, wind speed, RH (Relative Humidity), and DR (Draft Risk) to change the position of the AC supply supported by CFD (Computational Fluid Dynamics) simulation.This result prove that AC position 2 (on wall near the kitchen) is more comfortable than AC position 1 (on the bathroom wall) because AC position 2 away from occupied areas, thereby reducing the occurrence of draught discomfort.

Exergy Analysis of Energy Consumption for Central Air Conditioning System

2014 ◽  
Vol 628 ◽  
pp. 332-337
Author(s):  
Xiao Xia Xia ◽  
Nai Jun Zhou ◽  
Zhi Qi Wang
Keyword(s):  
Energy Consumption ◽  
Air Conditioning ◽  
Exergy Analysis ◽  
Exergy Efficiency ◽  
Dew Point ◽  
Exergy Loss ◽  
Air Conditioning System ◽  
Air Cooler ◽  
Central Air Conditioning ◽  
Air Conditioning Systems

The energy consumption of several central air conditioning systems in summer was researched by the method of exergy analysis. Combined with actual example,the exergy loss of all the equipments and the exergy efficiency of three systems were calculated. The results show that the exergy efficiency of three systems is very low. Relatively speaking, the exergy efficiency of primary return air conditioning system with supplying air in dew point is highest. The equipment of highest exergy loss is air-conditioned room, while the exergy loss of surface air cooler is smallest. Based on this, several improvement measures were proposed to reduce exergy loss and improve exergy efficiency.

Comparison study of air mixing modes in liquid desiccant based all-air air conditioning systems

2011 ◽  
Vol 33 (4) ◽  
pp. 423-435 ◽  
Author(s):  
Fu Xiao ◽  
XiaoFeng Niu
Keyword(s):  
Energy Consumption ◽  
Air Conditioning ◽  
Coefficient Of Performance ◽  
Liquid Desiccant ◽  
Total Energy Consumption ◽  
Air Conditioning System ◽  
Operation Conditions ◽  
Air System ◽  
Air Mixing ◽  
Air Conditioning Systems

Liquid desiccant is an energy-saving, environmentally friendly and healthy means of air dehumidification. A liquid desiccant-based all-air air conditioning system is studied by simulation. Two different modes of air mixing between the return air and the fresh air are compared, that is mixing before and mixing after the liquid desiccant dehumidifier, respectively. System performance and total energy consumption of the two modes under different operation conditions are obtained. The results show that mixing air after dehumidification consumes less energy than mixing air before dehumidification. Coefficient of performance (COP) of the all-air system with air mixing after dehumidification is higher. The differences of COP and energy consumption between the two air mixing modes increase when the outdoor air temperature and relative humidity increase. Practical application: Liquid desiccant based all-air system is quite suitable for museums, libraries and computer centres where water is not allowed to enter the space for property safety and strict thermal-hygrometric control is necessary. The results of this paper provide guidelines on the selection of air mixing modes in liquid desiccant-based all-air systems, considering energy consumption and system COP.

Study on Solar Air-Conditioning System of Temperature Difference

2012 ◽  
Vol 482-484 ◽  
pp. 1051-1056
Author(s):  
Cheng Yao Zhong
Keyword(s):  
Energy Consumption ◽  
Solar Energy ◽  
Temperature Difference ◽  
Air Conditioning ◽  
Air Conditioning System ◽  
Cost Of Electricity ◽  
Chilled Water ◽  
Save Energy ◽  
The Cost

In the solar air-conditioning system, it makes chilled water reduced to the lowest temperature in the night of the day without any form of energy consumption, and then makes use of water-cooled chillers of air conditioning to refrigerate further in the valley period of electricity consumptions. By doing this, it can improve the refrigeration coefficient of the air- conditioning system, and save energy and cost of electricity substantially. It will make the cost of solar air- conditioning lower than conventional air conditioning, and furthermore provides a broad way for the popularity of solar energy and solar air conditioning.

scholarly journals An Intelligent Feedback Controller Design for Energy Efficient Air Conditioning System

2020 ◽  
Vol 2 (3) ◽  
pp. 168-174
Author(s):  
P. Hengjinda ◽  
Dr. Joy Iong Zong Chen
Keyword(s):  
Energy Consumption ◽  
Air Conditioning ◽  
Controller Design ◽  
Comfort Level ◽  
Sensor Data ◽  
Air Conditioner ◽  
Human Comfort ◽  
Air Conditioning System ◽  
Proposed Model ◽  
Air Conditioning Systems

Air conditioning systems were invented to improve human comfort in a room or hall. An efficient air conditioner systems are always needed to minimize the power consumption. There are several settings with lot of control devices were introduced in the past years to achieve minimal energy consumption rate. Those control systems were minimized the energy consumption to certain limit without considering human comfort. The proposed model is designed to minimize the energy consumption with maximum human comfort. Several sensor modules were introduced in the model to predict human comfort level in a room or hall. The sensor data are taken as feedback to the air conditioning system for attaining maximum human comfort level. The proposed design is verified with energy consumption calculation and change in room temperature measurements.

Investigation into optimal control of terminal unit of air conditioning system for reducing energy consumption

2020 ◽  
Vol 177 ◽  
pp. 115499
Author(s):  
Zhaosong Fang ◽  
Tianwei Tang ◽  
Qianjin Su ◽  
Zhimin Zheng ◽  
Xiaoning Xu ◽  
...  
Keyword(s):  
Optimal Control ◽  
Energy Consumption ◽  
Air Conditioning ◽  
Air Conditioning System ◽  
Terminal Unit ◽  
Reducing Energy

Test and Energy Consumption Analysis of Air-Conditioning Systems in Terminal Building of Guilin Liangjiang International Airport

2012 ◽  
Vol 170-173 ◽  
pp. 2652-2656 ◽  
Author(s):  
Ming He Dai ◽  
Zhi Ping Zhou ◽  
Xing Xue
Keyword(s):  
Energy Consumption ◽  
Water Temperature ◽  
Air Conditioning ◽  
Operating Conditions ◽  
Air Conditioning System ◽  
International Airport ◽  
Energy Consumption Reduction ◽  
Chilled Water ◽  
Air Conditioning Systems ◽  
Relationship Of

In this paper, the operating conditions of air-conditioning systems in Terminal building of Guilin LiangJiang International Airport were tested and analysed. This paper mainly analyzes the influence of chilled water temperature on water chiller performance and derives the relationship of COP of water chiller and chilled water temperature difference between inlet and outlet , and provides reference for operation mode’s optimization of the air-conditioning system and energy consumption reduction of the whole building.

Field Test for Heat and Humidity Environment and Analysis of Air-Conditioning System Consumption

2012 ◽  
Vol 610-613 ◽  
pp. 2875-2878
Author(s):  
Hui Xing Li ◽  
Wei Xiao ◽  
Geng Geng ◽  
Bei Ni Li ◽  
Wei Wang
Keyword(s):  
Energy Consumption ◽  
Air Conditioning ◽  
Thermal Environment ◽  
Building Energy ◽  
Future Research ◽  
Main Body ◽  
Indoor Temperature ◽  
Air Conditioning System ◽  
Air Conditioning Systems ◽  
Humidity Environment

Museum has its particularity in public buildings and high research value for its thermal and humidity environment and building energy efficiency status. According to a investigation of air-conditioning systems and a test of indoor heat and humidity parameters in summer and winter for a museum in Shenyang, this article analysis its thermal environment and air-conditioning energy consumption status, draw the winter and summer indoor temperature and humidity and air-conditioning energy consumption chart, research the indoor temperature change rules and the energy consumption status of air-conditioning system in winter and summer. The results show that as air-conditioning energy consumption accounted for the main body of museum’s total building energy consumption, more energy-efficient technologies can be used to reduce the energy consumption of air-conditioning systems. And how to control the thermal environment of different types of collections in this museum, and take a consideration of energy saving, are focues of future research.

scholarly journals Comparison of cooling load and air conditioning systems in a lecture hall located in Poland and Spain

2018 ◽  
Vol 44 ◽  
pp. 00081
Author(s):  
Dorota Anna Krawczyk ◽  
Bernadetta Wądołowska ◽  
Antonio Rodero
Keyword(s):  
Energy Consumption ◽  
Air Conditioning ◽  
Lecture Hall ◽  
Cooling Load ◽  
Heat Sources ◽  
Air Conditioning System ◽  
Air Infiltration ◽  
Electrical Devices ◽  
Air Conditioning Systems ◽  
North And South

This paper discusses issues related to cooling load and energy consumption for air conditioning systems and presents the results of calculations conducted for six different climate localizations: three in Poland (Bialystok, Warsaw, Wroclaw) and three in Spain (Burgos, Madrid, Cordoba). Analysis was conducted for a same lecture hall design for 100 users locates in the different cities. During cooling load calculations, we focused on gains from diverse type of heat sources: electrical devices, air infiltration, heat transfer trough envelope and occupants. Calculations were made for a comfort temperature that was set at 22°C in Poland and 24°C in Spain following previous studies [11]. The highest contributions to cooling load correspond to occupancy and solar gains which depends mainly on outdoor conditions. In Poland, cooling load was found similar for different locations, while in Spain, they are big differences between cities located in North and South of this country by effect of different outdoor conditions. The work also compares cost of air condition annual energy consumption costs for the air conditioning system. Highest cost for cooling was found in Spain (Cordoba) with value (2629 €) almost 378% higher than average Polish cost.

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