Some considerations on heat transfer in spiral plate-heat exchangers.

1958 ◽  
Vol 7 (3) ◽  
pp. 196
2019 ◽  
Vol 48 (7) ◽  
pp. 3128-3143 ◽  
Author(s):  
Madhuri Charulatha Returi ◽  
Ramakrishna Konijeti ◽  
Abhishek Dasore

1957 ◽  
Vol 7 (1-2) ◽  
pp. 112-115 ◽  
Author(s):  
M.H.I. Baird ◽  
W. McCrae ◽  
F. Rumford ◽  
C.G.M. Slesser

Author(s):  
Amir Hossein Sabouri Shirazi ◽  
Maryam Ghodrat ◽  
Mohammad Reza Rastan ◽  
Fatemeh Salehi

Abstract This paper presents a systematic analysis of the thermodynamic performance of spiral turns in spiral plate heat exchangers (SPHEs), with and without heat leakage to the environment. An optimal design algorithm for SPHEs is developed to find higher compactness and overall heat transfer coefficient by increasing channels' pressure drops, maintaining geometric aspect ratio and minimizing the total costs. To specify the rate of heat loss to the environment, rate of internal heat transfer and channel temperature distribution, a mathematical model is proposed based on mass and energy balance equations to model the SPHE as a hypothetical heat exchanger network (HENs). Entropy-based and entransy-based performance evaluation methods in Heat Exchangers (HEs) are also examined to investigate the impact of heat leakage on the performance and irreversibility of the SPHEs. A single-phase counter-current SPHE is then designed as a case study, to examine the proposed mathematical and performance assessment models. The case study is defined and analyzed based on heat leakage to the environment. Three scenarios are then introduced namely heat leakage and no heat leakage to the environment and transferring the net heat between the streams. Results highlight the applicability of the proposed mathematical modelling and temperature distributions of channels in thermodynamics analysis of SPHEs with/without heat leakage to the environment. The findings also suggest that smaller adiabatic SPHEs can be a suitable substitute for non-adiabatic SPHEs providing appropriate insulation that covers outermost channels and prevent the leakage of the heat to the environment.


2018 ◽  
Vol 40 (12) ◽  
pp. 1007-1022 ◽  
Author(s):  
Kazushi Miyata ◽  
Hideo Mori ◽  
Takahiro Taniguchi ◽  
Shuichi Umezawa ◽  
Katsuhiko Sugita

2021 ◽  
Vol 9 (1) ◽  
pp. 60-71
Author(s):  
Abeth Novria Sonjaya ◽  
Marhaenanto Marhaenanto ◽  
Mokhamad Eka Faiq ◽  
La Ode M Firman

The processed wood industry urgently needs a dryer to improve the quality of its production. One of the important components in a dryer is a heat exchanger. To support a durable heat transfer process, a superior material is needed. The aim of the study was to analyze the effectiveness of the application of cross-flow flat plate heat exchangers to be used in wood dryers and compare the materials used and simulate heat transfer on cross-flow flat plate heat exchangers using Computational Fluid Dynamic simulations. The results showed that there was a variation in the temperature out of dry air and gas on the flat plate heat exchanger and copper material had a better heat delivery by reaching the temperature out of dry air and gas on the flat plate type heat exchanger of successive cross flow and.   overall heat transfer coefficient value and the effectiveness value of the heat exchanger of the heat transfer characteristics that occur with the cross-flow flat plate type heat exchanger in copper material of 251.74725 W/K and 0.25.


1989 ◽  
Vol 12 (1) ◽  
pp. 288-294 ◽  
Author(s):  
Udo Brockmeier ◽  
Martin Fiebig ◽  
Thomas Güntermann ◽  
Nimai K. Mitra

Author(s):  
Ece Özkaya ◽  
Selin Aradag ◽  
Sadik Kakac

In this study, three-dimensional computational fluid dynamics (CFD) analyses are performed to assess the thermal-hydraulic characteristics of a commercial Gasketed Plate Heat Exchangers (GPHEx) with 30 degrees of chevron angle (Plate1). The results of CFD analyses are compared with a computer program (ETU HEX) previously developed based on experimental results. Heat transfer plate is scanned using photogrammetric scan method to model GPHEx. CFD model is created as two separate flow zones, one for each of hot and cold domains with a virtual plate. Mass flow inlet and pressure outlet boundary conditions are applied. The working fluid is water. Temperature and pressure distributions are obtained for a Reynolds number range of 700–3400 and total temperature difference and pressure drop values are compared with ETU HEX. A new plate (Plate2) with corrugation pattern using smaller amplitude is designed and analyzed. The thermal properties are in good agreement with experimental data for the commercial plate. For the new plate, the decrease of the amplitude leads to a smaller enlargement factor which causes a low heat transfer rate while the pressure drop remains almost constant.


Sign in / Sign up

Export Citation Format

Share Document