Charging and discharging characteristics of absorption energy storage integrated with a solar driven double-effect absorption chiller for air conditioning applications

2020 ◽  
Vol 29 ◽  
pp. 101374 ◽  
Author(s):  
Nasiru I. Ibrahim ◽  
Fahad A. Al-Sulaiman ◽  
Aminuddin Saat ◽  
Shafiqur Rehman ◽  
Farid Nasir Ani
Keyword(s):  
Energy Storage ◽  
Air Conditioning ◽  
Double Effect ◽  
Absorption Chiller ◽  
Absorption Energy

On-site real-time evaluation of an air-conditioning direct-fired double-effect absorption chiller

2009 ◽  
Vol 86 (6) ◽  
pp. 968-975 ◽  
Author(s):  
E. Torrella ◽  
D. Sánchez ◽  
R. Cabello ◽  
J.A. Larumbe ◽  
R. Llopis
Keyword(s):  
Real Time ◽  
Air Conditioning ◽  
Double Effect ◽  
Absorption Chiller ◽  
Time Evaluation

Economic analysis of a novel solar-assisted air conditioning system with integral absorption energy storage

2021 ◽  
Vol 291 ◽  
pp. 125918
Author(s):  
Nasiru I. Ibrahim ◽  
Fahad A. Al-Sulaiman ◽  
Shafiqur Rehman ◽  
Aminuddin Saat ◽  
Farid Nasir Ani
Keyword(s):  
Energy Storage ◽  
Economic Analysis ◽  
Air Conditioning ◽  
Air Conditioning System ◽  
Absorption Energy ◽  
Integral Absorption

Solar Air-Conditioning System Using Single-Double Effect Combined Absorption Chiller

2013 ◽  
Vol 388 ◽  
pp. 133-138
Author(s):  
Hajime Yabase ◽  
Akira Hirai
Keyword(s):  
Air Conditioning ◽  
Heat Recovery ◽  
Double Effect ◽  
Hot Water ◽  
Gas Absorption ◽  
Load Factor ◽  
Absorption Chiller ◽  
Fuel Gas ◽  
Air Conditioning System ◽  
Solar Heat

We developed a single-double effect combined absorption chiller for "Solar air-conditioning system" . This chiller is composed of a highly-efficient gas absorption chiller as a main machine which are equipped with a solar heat recovery unit comprising a heat recovery heat exchanger and special condenser. It enables low temp. solar hot water at 75°C under operation at the cooling rating of load factor: 100%. And we constructed the demonstration plant in Japan. We confirmed that the solar heat priority usage function and gas-based backup function operate properly and overall system functions normally. In summer, fuel gas reduction by 10% could be achieved and the results as estimated were obtained.

scholarly journals Cooperative Operation Schedules of Energy Storage System and Demand Response Resources Considering Urban Railway Load Characteristic under a Time-of-Use Tariff

2021 ◽  
Vol 16 (3) ◽  
pp. 1273-1284
Author(s):  
Hye Ji Kim ◽  
Hosung Jung ◽  
Young Jun Ko ◽  
Eun Su Chae ◽  
Hyo Jin Kim ◽  
...  
Keyword(s):  
Energy Storage ◽  
Demand Response ◽  
Air Conditioning ◽  
Linear Problem ◽  
Storage System ◽  
Energy Charge ◽  
Energy Storage System ◽  
Peak Reduction ◽  
Railway Stations ◽  
Charging And Discharging Processes

AbstractThis paper proposes an algorithm for the cooperative operation of air conditioning facilities and the energy storage system (ESS) in railway stations to minimize electricity. Unlike traditional load patterns, load patterns of an urban railway station can peak where energy charge rates are not high. Due to this possibility, if applying the traditional peak-reduction algorithm to railway loads, energy changes can increase, resulting in higher electricity bills. Therefore, it is required to develop a new method for minimizing the sum of capacity charges and energy charges, which is a non-linear problem. To get a feasible solution for this problem, we suggest an algorithm that optimizes the facility operation through two optimizations (primary and secondary). This method is applied to the air-quality change model for operating air conditioning facilities as demand-response (DR) resources in railway stations. This algorithm makes it possible to estimate operable DR capacity every hour, rather than calculating the capacity of DR resources conservatively in advance. Finally, we perform a simulation for the application of the proposed method to the operation of DR resources and ESS together. The simulation shows that electricity bills become lowered, and the number of charging and discharging processes of ESS is also reduced.

Efficient Replacement of Centrifugal With Absorption Chillers Upgrading the Heat Transfer of the Cooling Tower

2001 ◽  
Author(s):  
E. D. Rogdakis ◽  
V. D. Papaefthimiou
Keyword(s):  
Flow Rate ◽  
Cooling Tower ◽  
Water Flow Rate ◽  
Cooling Water ◽  
Double Effect ◽  
Operating Conditions ◽  
Cooling Power ◽  
Absorption Chiller ◽  
Absorption Chillers ◽  
Cooling Water Flow Rate

Abstract It is a general trend today, the old centrifugal machines to be replaced by new absorption machines. The mass flow rate of the cooling water in the centrifugal machines is normally 30% less than that in the two-stage absorption chiller for the same refrigerating capacity. Some absorption chillers manufacturers have updated and improved the double-effect technology increasing the cooling water temperature difference from the typical value of 5.5°C to 7.4°C and reducing the cooling water flow rate by about 30%. Using such a modern double effect absorption unit to replace a centrifugal chiller the same cooling water circuit can be used and the total cost of the retrofit is minimized. In this case a new flow pattern of the cooling tower is developed, and in this paper the design of a new tower fill is predicted taking into account the new factors characterizing the operating conditions and the required performance of the tower. As an example, the operational curves of a modified cooling tower (1500 KW cooling power) used by a 240 RT double-effect absorption chiller are presented.

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