Investigation of heat transfer and hydraulic resistance in small-scale pillow-plate heat exchangers
| Autor: | Olga Arsenyeva, Eugeny Y. Kenig, Mark Piper, Alexander Olenberg, Alexander Zibart |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Air cooling
Pressure drop Materials science Turbulence 020209 energy Mechanical Engineering Plate heat exchanger Laminar flow 02 engineering and technology Building and Construction Mechanics Heat transfer coefficient Pollution Industrial and Manufacturing Engineering Physics::Fluid Dynamics General Energy 020401 chemical engineering Heat exchanger Heat transfer 0202 electrical engineering electronic engineering information engineering 0204 chemical engineering Electrical and Electronic Engineering Civil and Structural Engineering |
| Zdroj: | Energy. 181:1213-1224 |
| ISSN: | 0360-5442 |
| DOI: | 10.1016/j.energy.2019.05.099 |
| Popis: | Pillow-Plate Heat Exchangers (PPHEs) represent an innovative equipment type, with space-effective, light and pressure-resistant construction. In this work, an experimental study of air cooling by water in small-scale PPHEs was carried out and an analysis of the hydraulic resistance and heat transfer was performed based on the experimental data. A semi-empirical correlation for friction factor inside pillow-plate panels which is based on main geometric parameters is proposed. This correlation is reliable in a wide range of Reynolds numbers, both for laminar and turbulent flow regime. For the external channel between pillow-plate panels, the correlations for pressure drop and heat transfer were obtained based on experimental data. The CFD simulations were carried out to investigate heat transfer in the external channel of the PPHE. The deviation between the experimental and simulated values of heat transfer coefficient is maximum 17%. The received correlations enable to calculate the overall heat transfer and pressure drop in small-scale PPHEs and can be applied for preliminary design of PPHEs. The case study of the PPHE application for water heating is considered. The designed heat exchanger with minimal heat transfer area has 30% less surface area then chevron-type plate heat exchangers traditionally used for such application. |
| Databáze: | OpenAIRE |
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