High resolution measuring system for domestic hot water consumption. Development and field test

Anna Joanna Marszal, Bozhana Todorova Valeva, Viktoriya Vasileva Georgieva, Olena Kalyanova Larsen, Rasmus Lund Jensen, Chen Zhang

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Abstract

Much effort has been put in tightening the building regulations. Though, the energy usage for domestic hot water stayed unchanged constituting a bigger share of the energy pie over the years. Due to the cost, timeframe, and workload associated with instrumentation and installation, the vast majority of the DHW measurements are limited to the household level. This paper introduces a high resolution measuring technique for DHW consumption and its application in a single family house. By applying this technique, we are able to measure the duration, flow and temperature of each water draw event in the house and thus create both the temporal and spatial DHW consumption profiles. The results indicated that the duration of draws varies significantly between tapping places, i.e. the draws in the shower and in the kitchen have an average duration of 300 sec. and 20 sec., respectively. The high resolution metering system was able to record the inefficient use of DHW, at periods when the water temperature was not meeting the users’ requirements, e.g. the wasted energy at the shower depending on the usage patter varies between 25% and 42%. The measured temperature range of DHW in the household is between 52°C (kitchen) and 21°C (sink in utility room).
Original languageEnglish
JournalEnergy Procedia
Volume158
Issue numberFebruary 2019
Pages (from-to)2859-2864
Number of pages6
ISSN1876-6102
DOIs
Publication statusPublished - 2019
Event10th International Conference on Applied Energy - Hongkong, China
Duration: 22 Aug 201825 Aug 2018
Conference number: 10
http://www.applied-energy.org/icae2018/

Conference

Conference10th International Conference on Applied Energy
Number10
CountryChina
CityHongkong
Period22/08/201825/08/2018
Internet address

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Keywords

  • Domestic hot water measurements
  • High resolution measuring system
  • Household energy cosumption
  • Draw profiles
  • Field test

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