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Maximizing heat recovery in an air-to air heat exchanger by monitoring heat transfer
Authors: M.R.L. Bantle, E.M. Barber, S. Sokhansanj, and E.B. Moysey
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Download file: https://library.csbe-scgab.ca/docs/journal/31/31_2_217_ocr.pdf
Published in: CBE Journal » CBE Journal Volume 31 (1989)
Download RAW file: https://library.csbe-scgab.ca/docs/journal/31/31_2_217_raw.pdf
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Description: One of the greatest problems associated with the use of heat exchangers in livestock buildings is the accumulation of frost in the exhaust air passagesunder cold supply air conditions. In this project, a frost con trol system was developed in which the rate of heat transfer was moni tored and used to control the rate of frost accumulation and to schedule a defrost cycle. Results are reported for both computer simulations and for experiments with a 472 L/s heat exchanger that employed the new control system. The experiments were conducted for a supply air temperature of -25?C, and for exhaust air temperatures and relative humidities of 13 and 25?C, and 40 and 75%, respectively. The results showed diat die rate of heat recovery was less than the maximum ther modynamic recovery potential for the heat exchanger but greater than that attainable without a defrost cycle. A theoretical analysis suggested that the heat-transfer based control strategy has the potential to improve the overall heat recovery compared to time or pressure-based defrost control systems.
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Citation: M.R.L. Bantle, E.M. Barber, S. Sokhansanj, and E.B. Moysey 1989. MAXIMIZING HEAT RECOVERY IN AN AIR-TO AIR HEAT EXCHANGER BY MONITORING HEAT TRANSFER. Canadian Agricultural Engineering 31(2):217-225.
Volume: 31
Issue: 2
Pages -
Contributor:
Date: 1989
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Type: Text.Article
Format: PDF
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Coverage: Canada
Language 1: en
Language 2:
Rights: Canadian Society for Bioengineering
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Other files:
DOI:
Description: One of the greatest problems associated with the use of heat exchangers in livestock buildings is the accumulation of frost in the exhaust air passagesunder cold supply air conditions. In this project, a frost con trol system was developed in which the rate of heat transfer was moni tored and used to control the rate of frost accumulation and to schedule a defrost cycle. Results are reported for both computer simulations and for experiments with a 472 L/s heat exchanger that employed the new control system. The experiments were conducted for a supply air temperature of -25?C, and for exhaust air temperatures and relative humidities of 13 and 25?C, and 40 and 75%, respectively. The results showed diat die rate of heat recovery was less than the maximum ther modynamic recovery potential for the heat exchanger but greater than that attainable without a defrost cycle. A theoretical analysis suggested that the heat-transfer based control strategy has the potential to improve the overall heat recovery compared to time or pressure-based defrost control systems.
Keywords:
Résumé:
Mots-clés:
Citation: M.R.L. Bantle, E.M. Barber, S. Sokhansanj, and E.B. Moysey 1989. MAXIMIZING HEAT RECOVERY IN AN AIR-TO AIR HEAT EXCHANGER BY MONITORING HEAT TRANSFER. Canadian Agricultural Engineering 31(2):217-225.
Volume: 31
Issue: 2
Pages -
Contributor:
Date: 1989
Technical field:
Conference name:
Session name:
Other information:
Type: Text.Article
Format: PDF
Publication type:
Source:
Relation:
Coverage: Canada
Language 1: en
Language 2:
Rights: Canadian Society for Bioengineering
Notes:
Other files:
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