Application Analysis of Chilled Water Storage Technology in the Transformation of Central Air Conditioning System

2012 ◽  
Vol 608-609 ◽  
pp. 1097-1105
Author(s):  
Kai Jing Liu ◽  
Qun Li Zhang ◽  
De Ying Li
Keyword(s):  
Air Conditioning ◽  
Water Storage ◽  
Cost Comparison ◽  
Air Conditioning System ◽  
Storage Technology ◽  
Application Analysis ◽  
Chilled Water ◽  
Central Air Conditioning ◽  
Saving Effect ◽  
Operation Cost

This article introduces the specific application of central air conditioning chilled water storage technology in the actual central air conditioning engineered reconstruction. The author analyzes the energy-saving effect of application of central air conditioning chilled water storage technology and the economy of central conditioning renovation project. Operation cost comparison shows that water storage air conditioning system saves money more above 35% than conventional air conditioning system.

A New Air-Conditioning System with Chilled Water Storage

2013 ◽  
Vol 405-408 ◽  
pp. 2964-2968 ◽  
Author(s):  
Hu Lin ◽  
Xin Hong Li ◽  
Peng Sheng Cheng ◽  
Bu Gong Xu
Keyword(s):  
Economic Performance ◽  
Air Conditioning ◽  
Storage System ◽  
Peak Load ◽  
Water Storage ◽  
Engineering Application ◽  
Load Shifting ◽  
Air Conditioning System ◽  
Storage Technology ◽  
Chilled Water

For the purpose of grid peak load shifting, chilled water storage has been paid more and more attentions to integrated with air-conditioning system. In this paper, a new air conditioning system with directly chilled water storage is given. With peak-valley Price, cost for power consumption can be saved 15%-20% by coordinated operation between chilled water storage system and air conditioning system. By sensitivity analysis of system economic performance on ratio of peak price to valley price, it is revealed that with much higher ratio of peak price to valley price, not only system economic performance can seldom be improved, but also chilled water storage is restricted for engineering utilization. This paper supplies theory reference for engineering application of chilled water storage technology.

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.

Chilled Energy Storage for Air-Conditioning System of Buildings

2014 ◽  
Vol 496-500 ◽  
pp. 1020-1023
Author(s):  
Xiao Jian Shu
Keyword(s):  
Energy Storage ◽  
Economic Performance ◽  
Energy Cost ◽  
Air Conditioning ◽  
Water Storage ◽  
Ice Storage ◽  
Zero Temperature ◽  
Air Conditioning System ◽  
Chilled Water ◽  
Storage Technologies

Due to higher energy consumption for air-condition system and higher energy cost for building, the combination between peak-valley power price and chilled energy storage is provided and paid more and more attention. This paper introduced main chilled energy storage technologies and analyzed their economic performance, chilled water storage and ice storage both have good performance, but they fit for difference conditions, for chilled water storage, it doesnt need to add chiller for below zero temperature and fits for energy saving reform, and ice storage can meet the need of new air-conditioning system, which supplies a new application direction for energy cost saving operation in building.

Application Analysis of the Water-Source Heat Pump in Hot Summer and Cold Winter

2011 ◽  
Vol 347-353 ◽  
pp. 3036-3040
Author(s):  
Rui Ju ◽  
Qiu Na Cui
Keyword(s):  
Energy Consumption ◽  
Heat Load ◽  
Air Conditioning ◽  
Water Source ◽  
Performance Parameters ◽  
Cold Winter ◽  
Air Conditioning System ◽  
Operation Conditions ◽  
Application Analysis ◽  
Saving Effect

This paper is based on the BIN metrological data and calculates the cold and heat load of the building.According to the performance parameters of the WSHP, the energy consumption and cost of two typical schemes is calculated.Contrast the investment and cost of the SWHP and air conditioning system and discuss the applicability of commercial buildings. Result shows that WSHP costs less than traditional air conditioning in the present operation conditions. Energy-saving effect is remarkable.

Application of the Self-Adjusting Fuzzy Control in Water System of Central Air-Conditioner for Saving Energy

2014 ◽  
Vol 1070-1072 ◽  
pp. 2010-2016 ◽  
Author(s):  
Yuan Yuan Zhang ◽  
Yu Nong Shen
Keyword(s):  
Air Conditioning ◽  
Fuzzy Controller ◽  
Control Strategies ◽  
Water System ◽  
Response Speed ◽  
The Self ◽  
Air Conditioner ◽  
Air Conditioning System ◽  
Central Air Conditioning ◽  
Saving Effect

Central air conditioning system with multi variable, nonlinear, time-varying, large time-delay characteristics using the traditional control strategy is difficult to control and good energy saving effect. For these features of central air conditioning system, self-adjustment fuzzy controller is studied based on the fuzzy controller. The simulation can be seen, the self-adjustment fuzzy controller has a faster response speed and smaller steady-state error, while there is a certain adaptive capacity. Its control performance is superior to conventional control strategies and conventional fuzzy controller. Central air-conditioning system uses the parameter self-adjusting fuzzy controller strategy combined with inverter technology. According to load changes, central air conditioning water system can automatically real-timely control the pumps to ensure that the comfort of central air-conditioning provided a significant reduction in energy consumption.

scholarly journals Modeling Hybrid Nuclear Systems With Chilled-Water Storage

2016 ◽  
Vol 139 (1) ◽  
Author(s):  
Corey T. Misenheimer ◽  
Stephen D. Terry
Keyword(s):  
Energy Demand ◽  
Air Conditioning ◽  
Thermal Stresses ◽  
Water Storage ◽  
Hvac System ◽  
Air Conditioning System ◽  
Water Storage Tank ◽  
System Components ◽  
Chilled Water ◽  
Cooling Loads

Air-conditioning loads during the warmer months of the year are large contributors to an increase in the daily peak electrical demand. Traditionally, utility companies boost output to meet daily cooling load spikes, often using expensive and polluting fossil fuel plants to match the demand. Likewise, heating, ventilation, and air conditioning (HVAC) system components must be sized to meet these peak cooling loads. However, the use of a properly sized stratified chilled-water storage system in conjunction with conventional HVAC system components can shift daily energy peaks from cooling loads to off-peak hours. This process is examined in light of the recent development of small modular nuclear reactors (SMRs). In this study, primary components of an air-conditioning system with a stratified chilled-water storage tank were modeled in FORTRAN 95. A basic chiller operation criterion was employed. Simulation results confirmed earlier work that the air-conditioning system with thermal energy storage (TES) capabilities not only reduced daily peaks in energy demand due to facility cooling loads but also shifted the energy demand from on-peak to off-peak hours, thereby creating a more flattened total electricity demand profile. Thus, coupling chilled-water storage-supplemented HVAC systems to SMRs is appealing because of the decrease in necessary reactor power cycling, and subsequently reduced associated thermal stresses in reactor system materials, to meet daily fluctuations in cooling demand. Also, such a system can be used as a thermal sink during reactor transients or a buffer due to renewable intermittency in a nuclear hybrid energy system (NHES).

scholarly journals A Hybrid Solar-Gas Air Conditioning System Based on Adsorption and Chilled Water Storage

2011 ◽  
Author(s):  
Antonio P. F. Leite ◽  
Douglas B. Riffel ◽  
Celina M.C. Ribeiro ◽  
Francisco A. Belo ◽  
Paulo V.S.R. Domingos ◽  
...  
Keyword(s):  
Air Conditioning ◽  
Water Storage ◽  
Air Conditioning System ◽  
Chilled Water
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