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Microbial growth in domestic hot water systems with special emphasis on connections to district heating networks

Miscellaneous:

Abstract

It is by now well-estalished that domestic hot water systems often harbour Legionella bacteria. Measurements into a number of Danish systems have revealed many other bacteria, among them the thermophilic species Thermus, which is predominantly found on heating coils, where local temperatures are higher. This bacterium not only hampers heat transfer due to fouling, but may also be pathogenic, due to release of endotoxins. Its presence may explain a wide spectrum of symptoms experienced by people after hot baths, such as rashes and itching. The paper summarizes these findings, and on this basis engineering and microbiological considerations are presented in an effort to find ways of future control strategies that go beyond Legionella prevention. Special attention is given to district heating connections, in which low supply and return temperatures are generally wanted in the primary circuit. (author) 16 refs.
Authors:
Frederiksen, S; [1]  Krongaard Kristensen, K [2] 
  1. Lund Institute of Technology, Dept. of Heat and Power Engineering, Lund (SE)
  2. Regional Food and Hygiene Authority, Koebenhavns Amt Vest, Glostrup (DK)
Publication Date:
Jan 01, 1991
Product Type:
Miscellaneous
Report Number:
CONF-9104191-
Reference Number:
DK-91-001597; EDB-91-140137
Resource Relation:
Conference: International symposium on fluids for district heating, Copenhagen (Denmark), 10-11 Apr 1991; Related Information: In: Proceedings of the international symposium on fluids for district heating, by Boehm, B. (ed.), 323 p
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; DISTRICT HEATING; LEGIONELLA PNEUMOPHILA; ENDOTOXINS; HEALTH HAZARDS; HOT WATER; HOUSEHOLDS; THERMOPHILIC CONDITIONS; ANTIGENS; BACTERIA; HAZARDS; HEATING; HYDROGEN COMPOUNDS; MATERIALS; MICROORGANISMS; OXYGEN COMPOUNDS; TOXIC MATERIALS; TOXINS; WATER; 320603* - Energy Conservation, Consumption, & Utilization- Municipalities & Community Systems- Public Utilities- (1980-)
OSTI ID:
5281051
Research Organizations:
Nordisk Ministerraad; Danmarks Tekniske Hoejskole, Lyngby (Denmark). Lab. for Varme- og Klimateknik
Country of Origin:
Denmark
Language:
English
Other Identifying Numbers:
Other: ISBN: 87-88038-23-8
Availability:
Available on loan from Risoe Library, DK-4000 Roskilde, Denmark
Submitting Site:
DK
Size:
Pages: 301-315; (323 p)
Announcement Date:

Miscellaneous:

Citation Formats

Frederiksen, S, and Krongaard Kristensen, K. Microbial growth in domestic hot water systems with special emphasis on connections to district heating networks. Denmark: N. p., 1991. Web.
Frederiksen, S, & Krongaard Kristensen, K. Microbial growth in domestic hot water systems with special emphasis on connections to district heating networks. Denmark.
Frederiksen, S, and Krongaard Kristensen, K. 1991. "Microbial growth in domestic hot water systems with special emphasis on connections to district heating networks." Denmark.
@misc{etde_5281051,
title = {Microbial growth in domestic hot water systems with special emphasis on connections to district heating networks}
author = {Frederiksen, S, and Krongaard Kristensen, K}
abstractNote = {It is by now well-estalished that domestic hot water systems often harbour Legionella bacteria. Measurements into a number of Danish systems have revealed many other bacteria, among them the thermophilic species Thermus, which is predominantly found on heating coils, where local temperatures are higher. This bacterium not only hampers heat transfer due to fouling, but may also be pathogenic, due to release of endotoxins. Its presence may explain a wide spectrum of symptoms experienced by people after hot baths, such as rashes and itching. The paper summarizes these findings, and on this basis engineering and microbiological considerations are presented in an effort to find ways of future control strategies that go beyond Legionella prevention. Special attention is given to district heating connections, in which low supply and return temperatures are generally wanted in the primary circuit. (author) 16 refs.}
place = {Denmark}
year = {1991}
month = {Jan}
}