Energy Consumption by DHW System with a Circulation Loop as an Energy Efficiency Component, Based on an Example of a Residential Building

Marcin Klimczak, Grzegorz Bartnicki and Piotr Ziembicki
Additional contact information
Marcin Klimczak: Faculty of Environmental Engineering, Wrocław University of Science and Technology, C.K. Norwida 4/6 St., 50-373 Wrocław, Poland
Grzegorz Bartnicki: Faculty of Environmental Engineering, Wrocław University of Science and Technology, C.K. Norwida 4/6 St., 50-373 Wrocław, Poland
Piotr Ziembicki: Faculty of Civil Engineering, Architecture and Environmental Engineering, University of Zielona Góra, Prof. Z. Szafrana 15 St., 65-516 Zielona Góra, Poland

Energies, 2022, vol. 15, issue 11, 1-18

Abstract: In the EU countries, almost 50% of the produced energy is used in residential buildings. More than 25% of this energy is used to produce domestic hot water, of which almost 80% is used to heat water in domestic hot water circulation systems. This is due to high expectations on the part of residents based on their comfort, in particular regarding the supply of heat for heating and domestic hot water. In the course of their long-term research conducted on real systems, the authors confirmed that the operation of domestic hot water distribution systems causes significant costs, mainly due to heat losses. Therefore, typical variants of energy optimization of such systems were analyzed. Tests have shown that selected solutions, such as the use of control automation, are not sufficient, and recommended additional thermal insulation may not be applicable due to technical reasons. With an aim of finding a solution to the problem, the publication analyzes operational data from an existing heat source and domestic hot water circulation system in a residential building. On the basis of these analyses, a solution was proposed to reduce energy consumption within the installation by means of its hydraulic optimization. The reduction of heat losses in domestic hot water installation by means of a method presented by the authors is estimated at approximately 20%.

Keywords: domestic hot water; cost optimization; hot water circulation; hot water comfort; energy efficiency; emission reduction; user behavior (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/15/11/3952/pdf (application/pdf)
https://www.mdpi.com/1996-1073/15/11/3952/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:15:y:2022:i:11:p:3952-:d:825362

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().