Publication detail

Thermal performance of a radiant wall heating and cooling system with pipes attached to thermally insulating bricks

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

1

Pages to

18

Pages count

18

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"
}