Compact Heat Exchangers for Energy Transfer Intensification

Klemeš, Jiří Jaromír; Arsenyeva, Оlga; Kapustenko, Petro; Tovazhnyanskyy, Leonid

doi:10.1201/b18862

Cited by 37 publications

(35 citation statements)

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“…Design and simulation of PHE with corrugated plates is described in detail in monographs [2,3]. The algorithms and programs for a variety of plates of various corrugation sizes and types were developed and implemented [4].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…and the equation of thermal balance, for example on the hot side, it is possible to obtain the correlation of the form W, are met, that is, if it serves its primary purpose. To do this, we will use the basic equation of heat transfer of the exchanger in the form of Q=K•F•Δt ln , K is the heat transfer coefficient, W/(m 2 •K); F is the heat transfer surface area of the heat exchanger, m 2 ; Δt ln is the mean logarithmic temperature difference, K[2]. The designed heat exchanger must satisfy the condition…”

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confidence: 99%

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Advantages of using channels with different corrugation height in the plate heat exchangers

Khavin

Babak

2018

EEJET

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

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confidence: 99%

Advantages of using channels with different corrugation height in the plate heat exchangers

Khavin

Babak

2018

EEJET

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“…Queensland Geothermal Energy Centre of Excellence (QGECE) has been considering PHE as a favorite candidate for use in geothermal power systems [35]. A welded construction PHE without any gaskets which can work under temperatures beyond 400 °C and pressures up to 100 bar has been proposed for high temperature and pressure conditions [36], which means that welded construction PHEs can be used as vapor generators in supercritical ORCs.…”

Section: Heat Exchangersmentioning

confidence: 99%

Off-Design Performances of Subcritical and Supercritical Organic Rankine Cycles in Geothermal Power Systems under an Optimal Control Strategy

Gao

Liu

2017

Energies

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Abstract:The conditions of heat source and heat sink in a geothermal ORC system may frequently vary due to variations in geological conditions, ambient temperature and actual operation. In this study, an off-design performance prediction model for geothermal ORC systems is developed according to special designs of critical components, and an optimal control strategy which regards the turbine guide vane angle, the refrigerant pump rotational speed and the cooling water mass flow rate as control variables is proposed to maximize the net power output. Off-design performances of both subcritical and supercritical ORCs are analyzed. The results indicate that, under the optimal control strategy, the net power output of both ORCs increase with greater geothermal water mass flow rate, higher geothermal water inlet temperature and lower cooling water inlet temperature, which is mainly due to a greater working fluid mass flow rate, higher turbine inlet pressure and lower condensing pressure, respectively. The net power output of supercritical ORC is always greater than that of subcritical ORC within the range of this study, but the difference tends to decrease when supercritical ORC activates the geothermal water reinjection temperature restriction.

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“…Note that in plate heat exchangers the turbulent mode is observed already at Reynolds numbers from 50 to 200, which is provided by the geometric shape of the heat transfer surface of the plates [4].…”

Section: Introductionmentioning

confidence: 99%

Optmizing heat transfering surface shape of brazed plate heatexchanger

Li¹,

Odintsov²,

Sidenko

2019

Engineering for Rural Development

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Brazed plate heat exchangers are widely used in many areas of present industry, which indicates their advantages instead of traditional shell-tube heat exchangers. The using of rational combination of the shape and dimensions of the channels in combination with a correct layout of the heat exchanger allows to achieve a higher heat transfer intensity than in the shell-tube ones. The purpose of this work is to optimize the shape of the heat transfer surfaces of the plates, to improve the thermal properties of the plate heat exchanger and further introduction of it into production. As a base model the plate heat exchanger type 538 was chosen. In this work the surface shape of the plates of the heat exchangers was optimized taking into account the flow characteristics in the channels. Thermal and hydraulic parameters of the base and optimized surface were calculated by using the software package UNICALC Predict. Comparison with the base model calculations has shown that a heat exchanger with an optimized shape has a higher heat transfer coefficient up to 6 % and decreased hydraulic pressure drop up to 9 % as well as a higher heat transfer intensification effectivity coefficient ≈9 %. Based on the obtained calculation results a prototype of the tool and prototype of the heat exchanger with improved thermal properties were designed and manufactured.

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Compact Heat Exchangers for Energy Transfer Intensification

Cited by 37 publications

References 0 publications

Advantages of using channels with different corrugation height in the plate heat exchangers

Advantages of using channels with different corrugation height in the plate heat exchangers

Off-Design Performances of Subcritical and Supercritical Organic Rankine Cycles in Geothermal Power Systems under an Optimal Control Strategy

Optmizing heat transfering surface shape of brazed plate heatexchanger

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