A novel modelling method for plate heat exchanger to predict the outlet cooling water temperature

2019 ◽  
Vol 97 (6) ◽  
pp. 1809-1820 ◽  
Author(s):  
Yuming Guo ◽  
Fuli Wang ◽  
Mingxing Jia ◽  
Dapeng Niu
Keyword(s):  
Heat Exchanger ◽  
Water Temperature ◽  
Cooling Water ◽  
Plate Heat Exchanger ◽  
Plate Heat ◽  
Cooling Water Temperature ◽  
Modelling Method

Experimental Study of the Absorption Process of Organic Fluids in a Plate Heat Exchanger

2000 ◽  
Author(s):  
M. Vallès ◽  
M. Bourouis ◽  
D. Boer ◽  
M. Nogués ◽  
A. Coronas ◽  
...  
Keyword(s):  
Heat Exchanger ◽  
Cooling Water ◽  
Plate Heat Exchanger ◽  
Absorption Process ◽  
Two Phase ◽  
Plate Heat ◽  
Fluid Mixtures ◽  
Cooling Water Temperature ◽  
Mixing Chamber ◽  
Organic Fluids

Abstract In this paper, the absorption process in a plate heat exchanger with organic fluids has been experimentally investigated. It is well known that the absorber is the key component in absorption systems. The absorber studied consists of an adiabatic mixing chamber and a plate heat exchanger. In the mixing chamber, the solution that is poor in refrigerant is sprayed on the vapor refrigerant. Then, the two-phase mixture that is formed enters into the plate heat exchanger where the absorption process is completed by cooling the solution. Experiments have been performed using the organic fluid mixtures: Methanol-Tetraethyleneglycol dimethylether (TEGDME) and Trifluoroethanol (TFE)-TEGDME. The effect of the solution mass flow rate, the absorber pressure and the cooling water temperature on the absorber performance has been analyzed. The results obtained are discussed in terms of the absorber load, subcooling of the solution at the outlet of the absorber, overall heat transfer coefficient and absorbed mass flux. The information achieved should serve to understand better the absorption process for such mixtures and design an absorber using plate heat exchangers for air conditioning applications.

Closed Cooling Water Heat Exchanger Design for Higher Tube Inlet Water Temperature

2013 ◽  
Author(s):  
Thomas J. Muldoon ◽  
Joseph A. Bruno
Keyword(s):  
Heat Exchanger ◽  
Water Temperature ◽  
Cooling Water ◽  
Maximum Temperature ◽  
Temperature Changes ◽  
Cooling Water Temperature ◽  
Heat Exchanger Design ◽  
Load Demand ◽  
Service Water ◽  
Winter Operation

When the maximum temperature of cooling water slowly increases with temperature changes and shifting climate patterns, smaller LMTD’s (log mean temperature differences) for the CCW’s to meet the same performance heat rejection. Making the issue more critical is that the peak cooling water temperatures will usually occur at the same time as peak summer load demand. A smaller LMTD means a larger heat exchanger and more effective tubing surface area. More surface, means more tubing or smaller diameter tubing. If the original LMTD was 12 °F, a 1 degree change may mean an increase of 9%. To maintain the same nozzle locations on a replacement exchanger means a smaller tube outside diameter and/or a larger shell. Such increases are necessary for the high summer load conditions with the highest inlet water temperatures. At lower water temperatures, the amount of excess thermal capability can become a performance and corrosion issue as the water flows are modulated to meet temperatures. To help reduce these problems, a design which allows operation with reduced surface at low temperatures is appropriate. The temperature approach (Cooling Water Out – Service Water In) based on the higher inlet cooling water temperature can be significantly smaller than when the CCW was originally designed. This paper will address a design configuration that will work with both higher summer temperature cooling water with the flexibility of using less water for cooler winter operation. The overall affect is less pumping power during colder months, more consistent tube velocities which will help with heat transfer, and minimization of sediment settling in the tubes due to lower velocities.

OPTIMUM DESIGN OF GASKET PLATE HEAT EXCHANGER USING MULTIMODAL GENETIC ALGORITHM

2013 ◽  
Vol 44 (8) ◽  
pp. 761-789 ◽  
Author(s):  
Farzaneh Hajabdollahi ◽  
Zahra Hajabdollahi ◽  
Hassan Hajabdollahi
Keyword(s):  
Genetic Algorithm ◽  
Heat Exchanger ◽  
Optimum Design ◽  
Plate Heat Exchanger ◽  
Plate Heat

CONVECTION SCALING ON MODIFIED SURFACES OF PLATE HEAT EXCHANGER IN 80°C SIMULATED GEOTHERMAL WATER

2020 ◽  
Vol 8 (2) ◽  
pp. 117-133
Author(s):  
Fan Zhang ◽  
Weidong Zhou ◽  
Muhammad Zafar Ullah ◽  
Yongli Ma ◽  
Mingyan Liu
Keyword(s):  
Heat Exchanger ◽  
Plate Heat Exchanger ◽  
Geothermal Water ◽  
Plate Heat ◽  
Modified Surfaces
Sign in / Sign up

Export Citation Format

Share Document