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KRAJČÍK, M. ŠIMKO, M. ŠIKULA, O. SZABÓ, D. PATRÁŠ, D.
Original Title
Thermal performance of a radiant wall heating and cooling system with pipes attached to thermally insulating bricks
Type
journal article in Web of Science
Language
English
Original Abstract
A radiant wall heating and cooling system with pipes attached to thermally insulating bricks was tested using climate chambers and a hotbox. This system is especially suitable for building retrofit due to its affordability and ease of installation but can be also applied in new buildings. Besides walls, the design tested can be also used for ceilings. Thermal output and response, wall surface and cross-section temperature, and water temperature were measured under a range of thermal loads. The thermal response was fast despite the coupling of the pipe with the bricks; the time constant tau(63) was 0.5 h. The low conductivity core substantially reduced thermal losses meaning that the system can properly function even without thermal insulation. These qualities may present an advantage compared to systems with pipes coupled to a conductive core which require insulation and have longer response times. The difference between water and average surface temperature was small, up to 7.0 degrees C at the peak output of 100 W/m(2), which benefits the energy source efficiency. However, the surface temperature was nonuniform, which should be considered to prevent local condensation. Numerical simulations at room level showed that locating the system at one wall leads to a non-homogeneous thermal environment. Installation at multiple walls can be preferable to attain more uniform conditions. (C) 2021 Elsevier B.V. All rights reserved.
Keywords
Radiant heating and cooling; Wall system; Experiment; Thermal response; Thermal output; Thermal comfort
Authors
KRAJČÍK, M.; ŠIMKO, M.; ŠIKULA, O.; SZABÓ, D.; PATRÁŠ, D.
Released
1. 9. 2021
Publisher
ELSEVIER SCIENCE SA
Location
LAUSANNE
ISBN
0378-7788
Periodical
ENERGY AND BUILDINGS
Year of study
246
Number
1
State
Swiss Confederation
Pages from
Pages to
18
Pages count
URL
https://www-sciencedirect-com.ezproxy.lib.vutbr.cz/science/article/pii/S0378778821004060
BibTex
@article{BUT172698, author="Michal {Krajčík} and Martin {Šimko} and Ondřej {Šikula} and Daniel {Szabó} and Dušan {Petráš}", title="Thermal performance of a radiant wall heating and cooling system with pipes attached to thermally insulating bricks", journal="ENERGY AND BUILDINGS", year="2021", volume="246", number="1", pages="1--18", doi="10.1016/j.enbuild.2021.111122", issn="0378-7788", url="https://www-sciencedirect-com.ezproxy.lib.vutbr.cz/science/article/pii/S0378778821004060" }