Discussion and Commentary on “Robust scheduling of multi-chiller system with chilled-water storage under hourly electricity pricing” in “Energy and Buildings” 218 (2020) 110058

2021 ◽  
pp. 111445
Author(s):  
Ying Xue ◽  
Li Ge ◽  
Zhao Xue
Keyword(s):  
Water Storage ◽  
Electricity Pricing ◽  
Robust Scheduling ◽  
Chilled Water

Robust scheduling of multi-chiller system with chilled-water storage under hourly electricity pricing

2020 ◽  
Vol 218 ◽  
pp. 110058 ◽  
Author(s):  
Milad Sadat-Mohammadi ◽  
Somayeh Asadi ◽  
Mahmoud Habibnezhad ◽  
Houtan Jebelli
Keyword(s):  
Water Storage ◽  
Electricity Pricing ◽  
Robust Scheduling ◽  
Chilled Water

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.

The Prediction of Velocity and Temperature Profiles in Gravity Currents for Use in Chilled Water Storage Tanks

1994 ◽  
Vol 116 (1) ◽  
pp. 83-90 ◽  
Author(s):  
J. T. Nakos
Keyword(s):  
Storage Tank ◽  
Gravity Current ◽  
Water Storage ◽  
Gravity Currents ◽  
The Body ◽  
Temperature Profiles ◽  
Singular Perturbation Method ◽  
Efficient Manner ◽  
Water Storage Tank ◽  
Chilled Water

It has been demonstrated that one way of producing thin thermoclines (temperature gradients) in a chilled water storage tank is by introducing the water horizontally in the form of a gravity current. A gravity current is a fluid intrusion into a body of stagnant fluid at a different density. The incoming fluid is introduced at the bottom of the body of fluid if it is more dense; it is introduced at the top if it is less dense. In the application considered here, chilled water is to be stored in an efficient manner under the original body of warmer water. Vertical profiles of velocity and temperature in transient, two-dimensional, laminar, thermally driven, constant inflow gravity currents are studied. This provides a basis for understanding the initial stages of the formation of a thermocline in a chilled water storage tank. Two laminar flow formulations were developed to predict velocity and temperature profiles in the inertia-buoyancy regime. One formulation uses a strictly numerical approach, while the other uses a singular perturbation method to analyze the flow. Experimental temperature profiles are compared with the results from both formulations, and show good agreement.

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.

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