Analysis of energy-saving effect for absorption air-conditioning systems by means of cooling water flow rate control

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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Real Time Monitoring of Roll Cooling Water Flow Rate

COMADEM 89 International ◽

10.1007/978-1-4684-8905-7_26 ◽

1989 ◽

pp. 159-164

Author(s):

H. Kaghazchi ◽

R. Hilliard

Keyword(s):

Real Time ◽

Water Flow ◽

Flow Rate ◽

Water Flow Rate ◽

Cooling Water ◽

Real Time Monitoring ◽

Cooling Water Flow Rate

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Effective Fuel Consumption by Improving Cooling Water Flow Rate in IC Engine

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.812.112 ◽

2015 ◽

Vol 812 ◽

pp. 112-117

Author(s):

K.M. Kumar ◽

P. Venkateswaran ◽

P. Suresh

Keyword(s):

Flow Rate ◽

Cooling System ◽

Water Flow Rate ◽

Research Work ◽

Cooling Water ◽

Major Change ◽

Clear Understanding ◽

Water Pump ◽

Ic Engine ◽

Cooling Water Flow Rate

The coolant (water) pump assumes an important role of cooling system in IC engines. With upgrading of the engine power by turbocharging and turbo inter cooling, the water pump capacity needs to be increased corresponding to the power. This capacity enhancement has to be achieved without calling for a major change in the existing water pump, envelop and related fitment details. This requires a clear understanding of centrifugal pump for its performance parameter. One such engine is upgraded by turbocharging from 195PS to 240PS @2200 rpm. Improving water pump flow by changing the impeller dimensions, impeller casing, increase the suction, delivery pipe diameter had been done. Validation of the water pump in its actual engine installation was taken up as a part of the research work. Flow rate comparison of the new pump with the existing pump was made and the results were analyzed. The new water pump gives better flow rates for the engine speeds up to1800 rpm, beyond which the flow rate is slightly lesser than the existing pump.

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Effect of the cooling water flow rate to control self-heating of coal in a cylindrical reactor heated by a hot plate heater

10.1063/5.0014501 ◽

2020 ◽

Author(s):

Sofi Hesti Fathia ◽

Inkasandra Faranisa Kolang ◽

Ricky Putro Satrio Wicaksono ◽

Achmad Riadi ◽

Yulianto Sulistyo Nugroho

Keyword(s):

Water Flow ◽

Flow Rate ◽

Water Flow Rate ◽

Cooling Water ◽

Hot Plate ◽

Self Heating ◽

Cooling Water Flow Rate ◽

Cylindrical Reactor ◽

Plate Heater

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Experimental Study on the Desalination System Using Humidification-Dehumidification Technology

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1008.177 ◽

2020 ◽

Vol 1008 ◽

pp. 177-185

Author(s):

Hamed Abbady ◽

Mahmoud Salem Ahmed ◽

Hamdy Hassan ◽

A.S.A. Mohamed

Keyword(s):

Water Temperature ◽

Water Flow ◽

Flow Rate ◽

Water Flow Rate ◽

Cooling Water ◽

Operating Conditions ◽

Outlet Temperature ◽

Major Objective ◽

Cooling Water Flow Rate ◽

Output Ratio

In this paper, an experimental work studies the principal operating parameters of a proposed desalination process using air humidification-dehumidification method. The major objective of this work is to determine the humid air behavior through the desalination system. Different operating conditions including the effect of the water temperature at the entry to the humidifier, the ratio of the mass of water to the air, the air/water flow rate, and cooling water at entry the dehumidifier on the desalination performance were studied. The results show that the freshwater increases with increasing the water temperature at the inlet of the humidifier, the ratio of the mass of water to air, and cooling water flow rate in the dehumidifier. Cooling water outlet temperature at the condenser increases with increasing the water temperature at humidifier inlet. Also, it decreases as increasing cooling water flow rate while the ratio of the mass of water to air achieves the highest productivity and gained output ratio (GOR). The achieved mass ratio (MR) is 4.5 and the mass flow rate of air is 0.8 kg/min.

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