DBPapers
DOI:10.5593/SGEM2013/BD4/S17.004

ANALYSIS OF HOT WATER TEMPERATURE IN DOMESTIC HOT WATER DISTRIBUTION SYSTEM IN TERM OF SELECTED PARAMETERS

K. Knizova, M. Kovac
Monday 5 August 2013 by Libadmin2013

References: 13th SGEM GeoConference on Energy And Clean Technologies, www.sgem.org, SGEM2013 Conference Proceedings, ISBN 978-619-7105-03-2 / ISSN 1314-2704, June 16-22, 2013, 27 - 34 pp

ABSTRACT

The content of contribution is analysis of selected parameters of hot water pipes and their impact on decrease of hot water temperature during periods no domestic hot water draw-offs or during periods no operation of circulation pump. There was selected cooper pipe in different diameters normally used in hot water system installation and thermal insulation from polyethylene for analysis processing. The analytical calculation of hot water temperature goes out calculation methods by standard STN EN 15316-3-2. This standard is part of a series of standards aimed at the methodology for calculation of the energy performance of buildings and supports requirements of EU Directive 2010/31/EU. The aim of this contribution is to define period of drop of hot water temperature in distribution systems during periods no domestic hot water draw-offs or during periods no operation of circulation pump. The gained results could be used for determination of operating time of circulation pump in hot water distribution systems what could lead to some reduction of electric energy consumption and to the safety of desired hot water temperature on user outlets.

Keywords: Hot water temperature decrease, domestic hot water system, energy performance, domestic hot water distribution pipes