Conventional and advanced exergy analyses of an air-conditioning system in a subway station

2019 ◽  
Vol 29 (2/3/4) ◽  
pp. 236
Author(s):  
Junyan Yu ◽  
Haiyang Lu ◽  
Hua Yin ◽  
Zhihua Tang ◽  
Huafang Guo
Keyword(s):  
Air Conditioning ◽  
Subway Station ◽  
Air Conditioning System ◽  
Exergy Analyses

Conventional and advanced exergy analyses of an air-conditioning system in a subway station

2019 ◽  
Vol 29 (2/3/4) ◽  
pp. 236
Author(s):  
Hua Yin ◽  
Huafang Guo ◽  
Zhihua Tang ◽  
Junyan Yu ◽  
Haiyang Lu
Keyword(s):  
Air Conditioning ◽  
Subway Station ◽  
Air Conditioning System ◽  
Exergy Analyses

Application of Fuzzy PID for the Ventilation and Air Conditioning System of Subway Station

2011 ◽  
Vol 128-129 ◽  
pp. 811-814
Author(s):  
Jia Wang ◽  
Feng Wang ◽  
Yong Jiang ◽  
Zhi Xin Chen ◽  
Shi Tian Yan
Keyword(s):  
Air Conditioning ◽  
Parameter Tuning ◽  
Subway Station ◽  
Fuzzy Pid ◽  
Control Effect ◽  
Air Conditioning System ◽  
Fuzzy Pid Controller ◽  
Quality Of Control ◽  
On Line ◽  
Excellent Control

The ventilation and air conditioning system in the public area of subway station is a complex system which possesses a problem by once setting parameters of PID is difficult to ensure excellent control effect. Therefore this paper proposed an algorithm to adopt parameter tuning that could adjust the PID parameters on real time to ensure good quality of control system. It combined fuzzy logic control with conventional PID control algorithm, with the help of fuzzy tuning of PID parameters on line to change the control effect. By simulation, fuzzy PID controller could get better in control effect, higher in control accuracy, stronger in robustness than before.

Application of Fuzzy PID for the Ventilation and Air Conditioning System of Subway Station

2012 ◽  
Vol 6 (1) ◽  
pp. 821-823
Author(s):  
Wang Jia ◽  
Wang Feng ◽  
Jiang Yong ◽  
Chen Zhixin ◽  
Yan Shitian
Keyword(s):  
Air Conditioning ◽  
Subway Station ◽  
Fuzzy Pid ◽  
Air Conditioning System

scholarly journals Field investigation on operation parameters and performance of air conditioning system in a subway station

2019 ◽  
Vol 38 (1) ◽  
pp. 235-252 ◽  
Author(s):  
Yuan Li ◽  
Quan Zhang ◽  
Jiaqiang Wang ◽  
Chang Yue ◽  
Lunfei Che ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Air Conditioning ◽  
Cooling Capacity ◽  
Subway Station ◽  
Cooling Load ◽  
Power Demand ◽  
Air Conditioning System ◽  
Operation Conditions ◽  
Air Handling Units ◽  
Subway Stations

Ventilation and air conditioning system in subway stations accounts for about 50% of the total energy consumption of the subway stations. The energy consumption ratio of public area to equipment room is about 6.5:3.5. In order to understand the energy saving potential of public areas and equipment rooms, a field measurement for a typical subway station in central China was conducted from 19 to 29 September 2018. The field testing parameters include weather conditions, indoor air temperature and humidity, supply and return air flow rate, chilled water temperature, and flow rate. Meanwhile, some parameters recorded by the system control panel, such as pump frequency, chiller power demand, and energy consumption, were also collected. The paper studied the operating characteristics of the ventilation and air conditioning system and the cooling load pattern of the subway station, focusing on the following three aspects: cooling capacity and power demand of the chiller under different conditions, dynamic cooling capacity of the air handling units, and cooling load characteristics of the equipment rooms. Different operation conditions influence the operation of chiller. It was found that the real power demands under two operation conditions, i.e. minimum and all fresh air modes, are 121 and 77 kW, and the corresponding coefficient of performances are 4.33 and 4.77, respectively. The actual cooling capacity at night is about 80% that of the daytime, and is about 40% of the design value, which indicates that the air handling units operate under partial load. During the testing period, the actual cooling load is about 10–50% of the design load, of which 50–95% is sensible cooling load. These data can help readers understand the overall situation of a typical subway station adequately and provide numerical basis for energy saving optimization of the ventilation and air conditioning system.

The Experimental Research on Beijing Subway Air-Conditioning System Energy-Saving

2012 ◽  
Vol 170-173 ◽  
pp. 2494-2498 ◽  
Author(s):  
Wei Ya Zhang ◽  
Jun Wei
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Emission Reduction ◽  
Air Conditioning ◽  
Subway Station ◽  
Air Conditioning System ◽  
Feasible Method ◽  
System Energy ◽  
Reasonable Energy ◽  
Beijing Subway

The subway is the major means of transportation in Beijing, and it also takes huge energy consumption. Now the consumption of a subway station is 9500 kWh every day, and the proportion of the air-conditioning system energy dissipation is about 64%, in which, a big part of that can be saved down to save and make full use of the energy. The key to the air-conditioning system energy saving is to put forward reasonable energy-saving schemes and feasible method. In this paper, with a subway station in Beijing as a test location，the measurement and data analysis are carried out, and the schemes put forward for energy conservation and emission reduction in subway air- conditioning system.

Energy and exergy analyses of a transcritical CO2 air conditioning system for an electric bus

2021 ◽  
pp. 116819
Author(s):  
Xia Song ◽  
Daxiong Lu ◽  
Qiang Lei ◽  
Dandong Wang ◽  
Binbin Yu ◽  
...  
Keyword(s):  
Air Conditioning ◽  
Air Conditioning System ◽  
Electric Bus ◽  
Energy And Exergy ◽  
Exergy Analyses

ANALYSIS OF COMPETING VARIANTS OF AIR CONDITIONING SYSTEMS WITHOUT AIR EXTRACTION FROM ENGINES AT THE STAGE OF PASSENGER AIRCRAFT ONBOARD SYSTEMS CONCEPTUAL DESIGN

2019 ◽  
Vol 6 (3) ◽  
pp. 80-85
Author(s):  
Denis Igorevich Smagin ◽  
Konstantin Igorevich Starostin ◽  
Roman Sergeevich Savelyev ◽  
Anatoly Anatolyevich Satin ◽  
Anastasiya Romanovna Neveshkina ◽  
...  
Keyword(s):  
Conceptual Design ◽  
Air Conditioning ◽  
Research University ◽  
Cooling System ◽  
Fuel Efficiency ◽  
Air Cooling ◽  
Moscow Aviation Institute ◽  
Air Conditioning System ◽  
Low Efficiency ◽  
Air Conditioning Systems

One of the ways to achieve safety and comfort is to improve on-board air conditioning systems.The use of air cooling machine determines the air pressure high level at the point of selection from the aircraft engine compressor. Because of the aircraft operation in different modes and especially in the modes of small gas engines, deliberately high stages of selection have to be used for ensuring proper operation of the refrigeration machine in the modes of the aircraft small gas engines. Into force of this, most modes of aircraft operation have to throttle the pressure of the selected stage of selection, which, together with the low efficiency of the air cycle cooling system, makes the currently used air conditioning systems energy inefficient.A key feature of the architecture without air extraction from the main engines compressors is the use of electric drive compressors as a source of compressed air.A comparative analysis of competing variants of on-board air conditioning system without air extraction from engines for longrange aircraft projects was performed at the Moscow Aviation Institute (National Research University).The article deals with the main approaches to the decision-making process on the appearance of a promising aircraft on-board air conditioning system at the stage of its conceptual design and formulated the basic requirements for the structure of a complex criterion at different life cycle stages.The level of technical and technological risk, together with a larger installation weight, will require significant costs for development, testing, debugging and subsequent implementation, but at the same time on-board air conditioning system scheme without air extraction from the engines will achieve a significant increase in fuel efficiency at the level of the entire aircraft.

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