Energy saving effect prediction and post evaluation of air-conditioning system in public buildings

2011 ◽  
Vol 43 (11) ◽  
pp. 3243-3249 ◽  
Author(s):  
Chenchen Chang ◽  
Jing Zhao ◽  
Neng Zhu
Keyword(s):  
Energy Saving ◽  
Air Conditioning ◽  
Public Buildings ◽  
Air Conditioning System ◽  
Post Evaluation ◽  
Saving Effect

Energy-saving effect of utilizing recirculated air in electric vehicle air conditioning system

2019 ◽  
Vol 102 ◽  
pp. 122-129 ◽  
Author(s):  
Leyan Pan ◽  
Cichong Liu ◽  
Ziqi Zhang ◽  
Tianying Wang ◽  
Junye Shi ◽  
...  
Keyword(s):  
Energy Saving ◽  
Electric Vehicle ◽  
Air Conditioning ◽  
Air Conditioning System ◽  
Saving Effect

scholarly journals Research on Comprehensive Energy Saving Control Strategy of Air Conditioning

2020 ◽  
pp. 130-140
Author(s):  
Guozeng Wu , Tao Li , Yijin Gang
Keyword(s):  
Energy Consumption ◽  
Energy Saving ◽  
Control Strategy ◽  
Air Conditioning ◽  
Control Algorithm ◽  
Environmental Indicators ◽  
Air Conditioning System ◽  
Saving Effect ◽  
Energy Saving Control ◽  
Conditioning Control

On the basis of ensuring the requirements of process air parameters, the air conditioning control should reduce the energy consumption of the air conditioning system to the maximum extent. In this paper, by improving the adjusting speed and stability of the air conditioning system, and according to the process of environmental indicators allow deviation of belt, on the premise of not beyond the maximum technical index requirements by control algorithm to achieve better energy saving effect.

Design of Air-Conditioning System and Ventilation System in Web Press Workshop of One Printing Plant

2012 ◽  
Vol 256-259 ◽  
pp. 2640-2643
Author(s):  
Zi Jing Zhang ◽  
Bo Wen ◽  
Zhi Dong Lv
Keyword(s):  
Energy Saving ◽  
Air Conditioning ◽  
Waste Heat ◽  
Ventilation System ◽  
Good Method ◽  
Large Space ◽  
Total Load ◽  
Air Conditioning System ◽  
Saving Effect ◽  
Press Equipment

Air-conditioning and ventilation system which control temperature and humidity was designed in this paper. Its aim was to ensure the production process and meet the comfort requirements of workers. Considering that web press equipment load account for large proportion of the total load, we separated out the area of web press and the waste heat was discharged by ventilation system. We adopted Stratified air conditioning on the remaining area because the whole workshop is large space. By means of calculation, energy saving rate of stratified air conditioning system is 25.6% and the refrigerating capacity is reduced by this way of design. Energy-saving effect is remarkable. So it’s a good method to energy conservation.

The Energy Saving Effect of Natural Ventilation for Residential Building in Guangzhou

2011 ◽  
Vol 121-126 ◽  
pp. 597-601
Author(s):  
Cui Cui Qin ◽  
Li Hua Zhao
Keyword(s):  
Wind Speed ◽  
Energy Saving ◽  
Air Conditioning ◽  
Natural Ventilation ◽  
Residential Building ◽  
Air Conditioning System ◽  
Effective Measure ◽  
Rate Of Cooling ◽  
Saving Effect ◽  
Cooling Loads

Natural ventilation is the most effective measure to reduce the cooling energy consumption, but it is quite difficult to control and quantitatively assess the natural ventilation. A method was developed with coupling simulation by both software of DeST-h and computational fluid dynamics (CFD) in typical meteorological year (TMY) in Guangzhou. First, the base room temperatures with different air change (ACH) rates of natural ventilated dwelling were simulated with DeST-h. The time period in that the indoor air temperature could meet thermal comfort requirement only by natural ventilation in occupied period was analyzed, in which the wind speed and direction in TMY was obtained for the ventilation environment simulation of rooms in windows and doors switching with the PHOENICS software. The actual air change rates in different rooms in such wind speed and direction were calculated. Also the cooling loads of building in the actual air change rates were simulated with intermittent air conditioning. The air conditioning system operated when the base room temperature was higher than 29°C. Rate of cooling loads reduction was calculated by comparing the result to the baseline, which were the cooling loads of building with 1 ACH. The actual air change rates show that the energy saving effect of natural ventilation was influenced by the windows and doors switching. 61~71.37% of the natural ventilation potential was used in the rooms with windows and doors opened, and 14.06~82.54% of the natural ventilation potential was used in the rooms with windows opened and doors closed. The rate of cooling loads reduction in rooms and building were 0.34~10.50% and 6.14% respectively.

Modeling and Simulation of Chilled Water System for Central Air Conditioning

2012 ◽  
Vol 204-208 ◽  
pp. 4280-4285 ◽  
Author(s):  
Jian Min Sun ◽  
Chun Dong Zhang ◽  
Ze Yang Zhou
Keyword(s):  
Control System ◽  
Energy Saving ◽  
Pid Control ◽  
Air Conditioning ◽  
Water System ◽  
Air Conditioning System ◽  
Chilled Water ◽  
Central Air Conditioning ◽  
Chilled Water System ◽  
Saving Effect

Considering the central air conditioning system is highly susceptible to interferences from external environment, this paper established a dynamic mathematical model for chilled water system with the air conditioning area, fan coil unit and air conditioning area interference factors. Selection of chilled water system as a controlled object, designed the energy saving control system for central air-conditioning. The inputs of PID controller are deviation of actual temperature and setting temperature, and the change rate of the deviation; output is operation frequency of pump. Experiment shows that, PID control system in 90% time operating at a frequency of 10Hz-40Hz, average is 32.5Hz. Compared with no control system, the pump power consumption was reduced 33.9%.In conclusion, PID control in the central air conditioning system have a good energy saving effect.

scholarly journals Study on energy saving effect of IHX on vehicle air conditioning system

2018 ◽  
Vol 121 ◽  
pp. 052036
Author(s):  
Huguang Li ◽  
Lin Tong ◽  
Ming Xu ◽  
Wangrui Wei ◽  
Meng Zhao ◽  
...  
Keyword(s):  
Energy Saving ◽  
Air Conditioning ◽  
Air Conditioning System ◽  
Saving Effect

scholarly journals Assessing a Multi-Objective Genetic Algorithm with a Simulated Environment for Energy-Saving of Air Conditioning Systems with User Preferences

Symmetry ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 344
Author(s):  
Alejandro Humberto García Ruiz ◽  
Salvador Ibarra Martínez ◽  
José Antonio Castán Rocha ◽  
Jesús David Terán Villanueva ◽  
Julio Laria Menchaca ◽  
...  
Keyword(s):  
Genetic Algorithm ◽  
Energy Consumption ◽  
Energy Saving ◽  
User Satisfaction ◽  
Air Conditioning ◽  
State Of The Art ◽  
User Preferences ◽  
The State ◽  
Nsga Ii ◽  
Air Conditioning System

Electricity is one of the most important resources for the growth and sustainability of the population. This paper assesses the energy consumption and user satisfaction of a simulated air conditioning system controlled with two different optimization algorithms. The algorithms are a genetic algorithm (GA), implemented from the state of the art, and a non-dominated sorting genetic algorithm II (NSGA II) proposed in this paper; these algorithms control an air conditioning system considering user preferences. It is worth noting that we made several modifications to the objective function’s definition to make it more robust. The energy-saving optimization is essential to reduce CO2 emissions and economic costs; on the other hand, it is desirable for the user to feel comfortable, yet it will entail a higher energy consumption. Thus, we integrate user preferences with energy-saving on a single weighted function and a Pareto bi-objective problem to increase user satisfaction and decrease electrical energy consumption. To assess the experimentation, we constructed a simulator by training a backpropagation neural network with real data from a laboratory’s air conditioning system. According to the results, we conclude that NSGA II provides better results than the state of the art (GA) regarding user preferences and energy-saving.

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