scholarly journals Data Analysis and Modeling of Chilled Water Loops in Air Conditioning Systems

2017 ◽  
Vol 2017 ◽  
pp. 1-16 ◽  
Author(s):  
Zhida Zhao ◽  
Nanyang Yu ◽  
Tao Yu ◽  
Haofei Zhang
Keyword(s):  
Air Conditioning ◽  
Training Data ◽  
Local Optimum ◽  
Ann Model ◽  
Nonlinear Variation ◽  
Mean Squared Errors ◽  
Chilled Water ◽  
Air Conditioning Systems ◽  
Speed Simulation

Artificial neural network has been widely used in air conditioning systems as an effective method for predicting parameters, and the accuracy of ANN model relies on training data and network structure. In order to increase the quality of chilled water loops model, this paper develops an optimal data processing algorithm combining Kalman filtering with particle swarm optimization to compensate for uncertain factors and disturbances of collected data from the case building and establishes the nonlinear variation trend database. Based on Elman and BP neural networks, this paper proposes the improved network structures to avoid the local optimum predicted value of chilled water loops and increase data training speed. Simulation results show that this algorithm improves the data accuracy of current percentage (CP) of chillers and chilled water temperatures 12% and 9%. Compared with Elman and BP models, mean absolute errors of CP improved models are improved 24.1% and 10.3%, and mean squared errors of water temperature improved models are improved 5.2% and 4.8%. For the purpose of energy conservation control in air conditioning systems, this work has an application value and can be used for predicting other parameters of buildings.

Audio Synthesis and Sound Quality of Automotive Air-Conditioning Systems

2017 ◽  
Author(s):  
Antoine Minard ◽  
Christophe Lambourg ◽  
Patrick Boussard ◽  
Olivier Cheriaux
Keyword(s):  
Air Conditioning ◽  
Sound Quality ◽  
Automotive Air Conditioning ◽  
Air Conditioning Systems

scholarly journals Distributed Pumping Chilled Water Hydronic System for Air-conditioning Systems

2017 ◽  
Vol 143 ◽  
pp. 88-93
Author(s):  
Sam K.H. Lam ◽  
Chris Tham ◽  
Sunil Saseedharan ◽  
Liong Yin Chun ◽  
Adrian Wang
Keyword(s):  
Air Conditioning ◽  
Chilled Water ◽  
Air Conditioning Systems

scholarly journals Eulerian Video Magnification for Cleaning and Inspection of Air Conditioning Ducts With Rover Robot

2020 ◽  
Vol 8 (3) ◽  
pp. 38-47 ◽  
Author(s):  
Filipe dos Santos Aureliano ◽  
Alessandro Ferreira Alves ◽  
Rodrigo Franklin Frogeri ◽  
Wanderson Gomes de Souza ◽  
Simone de Paula Teodoro Moreira ◽  
...  
Keyword(s):  
Air Conditioning ◽  
Temporal Variations ◽  
Camera System ◽  
Naked Eye ◽  
The World ◽  
Removal Of Impurities ◽  
The Many ◽  
Air Conditioning Systems ◽  
Industrial Context

This paper presents a diversied artifice of a Rover robot prototype in order to inspect abnormalities in air conditioning ducts and ventilation through an integrated rotating high-resolution camera system Eulerian Video Magnification is a  method capable of revealing temporal  variations of a body in videos that are impossible to see with the naked eye. Using this method, it is possible to visualize the flow of microorganisms present in the ducts, in which the images are R.W. transmitted in real time to the operator, allowing the cleaning with rotating brushes that adapt themselves  according to the  pipeline geometry, linked to the rover making the removal of impurities which are found on the walls, as well as the application of fungicides and bactericides, and finally the mechanism structure allows the manipulation of small objects held by a claw, which ensures greater operating flexibility compared to existing systems on the market. Due to weather problems being the main responsible for the considerable rise in temperature around the world, this has led man to seek ways by which people have comfort in both residential and industrial context. The most widely used alternative to soften or even solve this problem indoors has been the use of air conditioning systems. Despite the many advantages that these systems provide, there is great concern with the quality of air being supplied to the user according to the procedures and requirements of NBR 15848: 2010.

scholarly journals The microbiological quality of air improves when using air conditioning systems in cars

2010 ◽  
Vol 10 (1) ◽  
Author(s):  
Ralf-Peter Vonberg ◽  
Petra Gastmeier ◽  
Björn Kenneweg ◽  
Hinrich Holdack-Janssen ◽  
Dorit Sohr ◽  
...  
Keyword(s):  
Air Conditioning ◽  
Microbiological Quality ◽  
Air Conditioning Systems

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.

scholarly journals Developing a Strategy to Recover Condensate Water from Air Conditioners in Palestine

Water ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1696
Author(s):  
Lubna Siam ◽  
Issam A. Al-Khatib ◽  
Fathi Anayah ◽  
Shehdeh Jodeh ◽  
Ghadir Hanbali ◽  
...  
Keyword(s):  
Air Conditioning ◽  
Local Level ◽  
Oxygen Demand ◽  
Water Source ◽  
Air Conditioner ◽  
Policy Makers ◽  
Air Conditioners ◽  
Alternative Water ◽  
Air Conditioning Systems

As the need for water is increasing in Palestine, and the available water resources are barely sufficient to meet the demands of the current quality of life and the economy, air conditioner condensate water could be explored as an alternative water source. The objective of this study is to better understand the potential for recovery of condensate water from air conditioning systems in two Palestinian cities. In addition, this study aims to evaluate this water source in terms of quality and quantity. Generally, it was found that the condensate water has good quality, which conforms to the Palestinian standards for reused water for irrigation, except for turbidity, biological oxygen demand (BOD) and chemical oxygen demand (COD) measurements. Reflecting the heavy metal occurrence in the collected condensate water, no particular risk was recognized for drinking water or reused irrigation standards, except for manganese occurrence of 0.19 mg/L in one sample. From a single unit capacity, high quantities of water were observed of approximately 259 L and 453 L per month in Ramallah and Jericho cities, respectively. These figures should draw the attention of decision and policy makers to put in place strict technical guidelines to be followed for potential reuse of condensate water at the local level.

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