Annual Energy Performance of an Air Handling Unit with a Cross-Flow Heat Exchanger

Michalak, Piotr

doi:10.3390/en14061519

Cited by 4 publications

(1 citation statement)

References 57 publications

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“…The use of organized supply ventilation systems with the installation of heat recovery devices is the only energetically, economically and socially justified method of significant (up to 60-80%) reduction of heat costs of heating systems and air conditioning systems. It allows you to use the heat of exhaust air as a secondary energy resource (SER) [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Peculiarities of thermal calculation of cross-flow plate air recuperators

Vdovichev

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Application of modern energy-saving technologies is the most important task in development of construction industry. In the conditions of exhausting decrease of energy consumption of public, administrative buildings due to reduction of transmission heat losses the implementation of mechanical ventilation with recuperation of exhaust air heat becomes a rational way to increase energy efficiency. One of the key problems in the study of plate-type air recuperators is to find the temperature efficiency of the device. The value of this characteristic is influenced by such parameters as the area of the branched heat exchange surface, initial temperatures of heat carriers, volume flow rates, flow rate ratio, type of fins, etc. The purpose of the study is to compare coefficients of thermal efficiency of outside air as a function of Reynolds number obtained by engineering calculation, mathematical modelling and manufacturer’s data for the recuperator ISIS Recover HR-A-05-V-G4-E-1-60. The article substantiates the calculation method using the existing algebraic dependence describing heat transfer in the cross-flow scheme of coolant motion on the basis of new results. An empirical dependence is obtained, which adequately describes the results of numerical simulation using the ANSYS Fluent solver and engineering calculation.

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Section: Introductionmentioning

confidence: 99%

Peculiarities of thermal calculation of cross-flow plate air recuperators

Vdovichev

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Computational investigation of cross flow heat exchanger: A study for performance enhancement using spherical dimples on fin surface

Paul,

Lubaba,

Pratik

et al. 2023

International Journal of Thermofluids

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Experimental and Theoretical Study on the Internal Convective and Radiative Heat Transfer Coefficients for a Vertical Wall in a Residential Building

Michalak

2021

Energies

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Experimental studies on internal convective (CHTC) and radiative (RHTC) heat transfer coefficients are very rarely conducted in real conditions during the normal use of buildings. This study presents the results of measurements of CHTC and RHTC for a vertical wall, taken in a selected room of a single-family building during its everyday use. Measurements were performed using HFP01 heat flux plates, Pt1000 sensors for internal air and wall surface temperatures and a globe thermometer for mean radiant temperature measured in 10 min intervals. Measured average CHTC and RHTC amounted to 1.15 W/m2K and 5.45 W/m2K, compared to the 2.50 W/m2K and 5.42 W/m2K recommended by the EN ISO 6946, respectively. To compare with calculated CHTC, 14 correlations based on the temperature difference were applied. Obtained values were from 1.31 W/m2K (given by Min et al.,) to 3.33 W/m2K (Wilkes and Peterson), and in all cases were greater than the 1.15 W/m2K from measurements. The average value from all models amounted to 2.02 W/m2K, and was greater than measurements by 75.6%. The quality of models was also estimated using average absolute error (AAE), average biased error (ABE), mean absolute error (MAE) and mean bias error (MBE). Based on these techniques, the model of Fohanno and Polidori was identified as the best with AAE = 68%, ABE = 52%, MAE = 0.41 W/m2K and MBE = 0.12 W/m2K.

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Annual Energy Performance of an Air Handling Unit with a Cross-Flow Heat Exchanger

Cited by 4 publications

References 57 publications

Peculiarities of thermal calculation of cross-flow plate air recuperators

Peculiarities of thermal calculation of cross-flow plate air recuperators

Computational investigation of cross flow heat exchanger: A study for performance enhancement using spherical dimples on fin surface

Experimental and Theoretical Study on the Internal Convective and Radiative Heat Transfer Coefficients for a Vertical Wall in a Residential Building

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