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RESEARCH OF SINGLE ROOM DECENTRALIZED HEAT RECOVERY UNIT Cover

RESEARCH OF SINGLE ROOM DECENTRALIZED HEAT RECOVERY UNIT

Architecture, Civil Engineering, Environment
Volume 12 (2019): Issue 4 (December 2019)
By: Piotr KOPER,  Agnieszka PALMOWSKA and  Agnieszka MYSZKOWSKA  
Open Access
|Jan 2020

Figures & Tables

Figure 1.

HRU-WALL-100-25 compact recuperator and its dimensions in millimeters [11]
HRU-WALL-100-25 compact recuperator and its dimensions in millimeters [11]

Figure 2.

Air temperature test stand
Air temperature test stand

Figure 3.

Location of the thermocouples; 1) in the air intake, 2) in the outdoor environment, 3) between the heat exchanger and the fan, 4) behind the fan (air inlet to the room), 5) in the room
Location of the thermocouples; 1) in the air intake, 2) in the outdoor environment, 3) between the heat exchanger and the fan, 4) behind the fan (air inlet to the room), 5) in the room

Figure 4.

Scheme of air velocity distribution test stand
Scheme of air velocity distribution test stand

Figure 5.

Tube halves printed in a 3D printer
Tube halves printed in a 3D printer

Figure 6.

Sample graph of air temperatures for the second fan speed at balanced pressures in the room and outside
Sample graph of air temperatures for the second fan speed at balanced pressures in the room and outside

Figure 7.

Air velocity profile for supply mode (left) and exhaust mode (right) for third fan speed and 0 Pa of pressure difference
Air velocity profile for supply mode (left) and exhaust mode (right) for third fan speed and 0 Pa of pressure difference

Calculated averaged air flow volume rate for all fan speeds based on measurements for 0 Pa

Air supply0 Pa
first fan speed9 m3/h
second fan speed16 m3/h
third fan speed28 m3/h
Air exhaust0 Pa
first fan speed8 m3/h
second fan speed14 m3/h
third fan speed29 m3/h

Calculated supply efficiency for the tested working conditions

Working conditionsSupply efficiency
third fan speed at balanced pressures64%
second fan speed at balanced pressures68%
first fan speed at balanced pressures79%
third fan speed at a natural pressure difference56%
second fan speed at a natural pressure difference47%

Calculated exhaust efficiency for the tested working conditions

Working conditionsExhaust efficiency
third fan speed at balanced pressures73%
second fan speed at balanced pressures83%
first fan speed at balanced pressures85%
third fan speed at a natural pressure difference79%
second fan speed at a natural pressure difference93%

Calculated averaged air flow volume rate for all fan speeds based on measurements for 7 Pa

Air supply7 Pa
first fan speed19 m3/h
second fan speed22 m3/h
third fan speed36 m3/h
Air exhaust7 Pa
first fan speed-8 m3/h
second fan speed6 m3/h
third fan speed25 m3/h

Calculated averaged air flow volume rate for all fan speeds based on measurements for 4 Pa

Air supply4 Pa
first fan speed14 m3/h
second fan speed20 m3/h
third fan speed32 m3/h
Air exhaust4 Pa
first fan speed2 m3/h
second fan speed12 m3/h
third fan speed27 m3/h
DOI: https://doi.org/10.21307/acee-2019-056 | Journal eISSN: 2720-6947 | Journal ISSN: 1899-0142
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Language: English
Page range: 109 - 114
Submitted on: Jul 28, 2019
Accepted on: Oct 2, 2019
Published on: Jan 7, 2020
Published by: Silesian University of Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
Decentralized ventilation,
Heat recovery,
Measurements,
Single room unit,
Recuperator
Related subjects:
Architecture and design,
Architecture,
Architects, buildings

© 2020 Piotr KOPER, Agnieszka PALMOWSKA, Agnieszka MYSZKOWSKA, published by Silesian University of Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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