Energy efficiency of variable frequency water pump in building air conditioning system

2012 ◽  
Author(s):  
Wei Cai ◽  
Huang Wang ◽  
Wenjun Chen ◽  
Maidun Ma
Keyword(s):  
Energy Efficiency ◽  
Air Conditioning ◽  
Variable Frequency ◽  
Water Pump ◽  
Air Conditioning System

Some Problems in the Engineering Application of Variable Frequency Technique

2011 ◽  
Vol 71-78 ◽  
pp. 4425-4429
Author(s):  
Guang Jun Liu ◽  
Hong Mei Zhu
Keyword(s):  
Air Conditioning ◽  
Engineering Application ◽  
Variable Frequency ◽  
Air Conditioning System ◽  
The Future ◽  
Actual Use

As the variable frequency technology was widely used in heating and air conditioning system, people pay more and more attentions to it. However, there are some misunderstandings of the applications of the variable frequency technology during the actual use. Some problems which should be marked in the applications of the variable frequency technology were summarized, which provides some reference for its further application in the future.

The Energy Efficiency Reconstruction and Energy Consumption Assessments about a Library in Guangzhou

2011 ◽  
Vol 374-377 ◽  
pp. 672-676
Author(s):  
Liu Zhi Chen ◽  
Xiao Ning Xu ◽  
Han Wei Liu
Keyword(s):  
Energy Efficiency ◽  
Control System ◽  
Energy Consumption ◽  
Air Conditioning ◽  
Network Control ◽  
Operational Control ◽  
Network Control System ◽  
Air Conditioning System ◽  
Operational Management ◽  
Central Air Conditioning

How to reduce the energy consumption of the central air-conditioning is important for the building energy efficiency. The energy efficiency reconstruction of the central air-conditioning system on one library in Guangzhou is completed with the network control system self-developed. The operational control and operational management is integrated in the network control system. The energy consumption before and after reconstruction about the air-conditioning system of the library is detected and analyzed in the paper. The result shows the mode that operational control and operational management integrated has better energy efficiency.

scholarly journals Modeling and Simulation of Heat Pump Air-Conditioning System using Ecofriendly Refrigerants

2021 ◽  
Vol 9 (VI) ◽  
pp. 1166-1170
Author(s):  
Ajay Landage
Keyword(s):  
Energy Efficiency ◽  
Comparative Analysis ◽  
Physical Properties ◽  
Heat Pump ◽  
Air Conditioning ◽  
Coefficient Of Performance ◽  
Simulation Approach ◽  
Alternative Refrigerants ◽  
Air Conditioning System ◽  
Selection Of

A simulation approach to heat pump systems is proposed in this paper. The evaluation of working fluids is conducted. Moreover, the selected refrigerants are used in the simulation. Subsequently, the system is analyzed in terms of the coefficient of performance (COP) and energy efficiency. Some alternative refrigerants, instead of R22 used R290 refrigerent. It is described the selection of refrigerants adapted to each utilization, based on the thermodynamic and -physical properties, the technological behaviour, costs and use constraints as principal aspects of the environmental protection. Also, it is performed a comparative analysis in function of the total equivalent warming impact (TEWI) for some possible substitutes of refrigerant R22 used in various refrigeration and heat pump systems.

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