Flow rate optimization in run-around heat recovery systems
Journal article, 2022
This paper presents a mathematical model of a run-around heat recovery system. The model is validated with lab measurements and used further in parametric studies to evaluate how the overall thermal effectiveness of a system is influenced by different heat exchanger configurations, coupling liquids and operating conditions. Important findings suggests that the thermal effectiveness is highly sensitive to the coupling liquid flow rate, particularly for systems designed for high thermal effectiveness and for variable air volumes. The optimum liquid flow rate cannot only be determined by the air flow rate as it is influenced by the heat exchanger configuration and the liquid properties and not always found within the turbulent flow regime.
Author
Mohammad Mahmoud
Chalmers, Architecture and Civil Engineering, Building Services Engineering
Peter J Filipsson
Chalmers, Architecture and Civil Engineering, Building Services Engineering
Samuel Brunninge
FläktGroup Sweden AB
Jan-Olof Dalenbäck
Chalmers, Architecture and Civil Engineering, Building Services Engineering
Applied Thermal Engineering
1359-4311 (ISSN)
Vol. 200 117599Run-around coil heat recovery
Swedish Energy Agency (47830-1), 2019-04-01 -- 2021-12-31.
Driving Forces
Sustainable development
Subject Categories
Energy Engineering
Other Civil Engineering
Building Technologies
Areas of Advance
Energy
DOI
10.1016/j.applthermaleng.2021.117599