Modeling air-to-air plate-fin heat exchanger without dehumidification

G. Zhou, Y. Ye, J. Wang, Wangda Zuo, Y. Fu, X. Zhou

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In heating, ventilation and air-conditioning (HVAC) systems, air-to-air plate-fin heat exchangers (PFHEs) can be used as heat recovery devices to reduce the building energy consumption. However, existing heat exchanger models have limitations in simulating the performance of air-to-air PFHEs. For example, some models adopt heat transfer correlations which are not suitable for PFHEs, while others require detailed geometric data which are usually difficult to access, etc. To address these limitations, we developed a new model for air-to-air PFHE without dehumidification. Based on empirical correlations dedicated to air-to-air PFHEs, the mathematical models of the heat transfer and the flow resistance were built. The new model considers the impacts of the changing air flow rates and temperatures. Additionally, it only requires readily available nominal parameters as inputs and does not need any geometric data. Furthermore, no numerical discretization is needed to solve the equations, which makes the model computationally more efficient than models using the finite-element method. To evaluate the performance of the new model, it is implemented using an object-oriented, equation-based modeling language Modelica. Case studies show that the new model can predict the results with a relative deviation less than 10% compared to the experimental data.

Original languageEnglish (US)
Pages (from-to)137-148
Number of pages12
JournalApplied Thermal Engineering
Volume143
DOIs
StatePublished - Oct 1 2018
Externally publishedYes

Fingerprint

Fins (heat exchange)
Heat exchangers
Air
Heat transfer
Waste heat utilization
Air conditioning
Ventilation
Energy utilization
Flow rate
Mathematical models
Finite element method
Heating

Keywords

  • Air-to-air
  • Mathematical model
  • Modelica
  • Plate-fin heat exchanger

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

Cite this

Modeling air-to-air plate-fin heat exchanger without dehumidification. / Zhou, G.; Ye, Y.; Wang, J.; Zuo, Wangda; Fu, Y.; Zhou, X.

In: Applied Thermal Engineering, Vol. 143, 01.10.2018, p. 137-148.

Research output: Contribution to journalArticle

Zhou, G. ; Ye, Y. ; Wang, J. ; Zuo, Wangda ; Fu, Y. ; Zhou, X. / Modeling air-to-air plate-fin heat exchanger without dehumidification. In: Applied Thermal Engineering. 2018 ; Vol. 143. pp. 137-148.
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