Publication detail

Heat storage efficiency and effective thermal output: Indicators of thermal response and output of radiant heating and cooling systems

KRAJČÍK, M. ŠIKULA, O.

Original Title

Heat storage efficiency and effective thermal output: Indicators of thermal response and output of radiant heating and cooling systems

Type

journal article in Web of Science

Language

English

Original Abstract

An alternative indicator of thermal response of radiant heating and cooling systems called heat storage efficiency (HSE) has been tested. The heat storage efficiency was compared with established indicators represented by the time constant tau(63), response time tau(95), and thermal energy stored (TES). The comparison was performed for three wall cooling systems with various combinations of pipe location, configuration of material layers, and materials of the thermal core. Considering the whole response curve (HSE) instead of focusing on one specific point on the curve (tau(63), tau(95)) allowed comparing the thermal response of complex systems by a single value. It also permitted predicting thermal response consistently regardless of the system and core material. Thermal energy stored predicted the thermal response of certain systems, but it may not be suitable for comparing the thermal response of radiant systems with different thermal admittance. Besides, a novel indicator of thermal output called effective thermal output (ETO) has been proposed. The effective thermal output considers both the steady-state thermal performance represented by the nominal thermal output and dynamic thermal performance represented by the heat storage efficiency. For thermally active building systems (TABS), effective thermal output was up to 57% lower than the nominal thermal output. (C) 2020 Elsevier B.V. All rights reserved.

Keywords

Radiant heating and cooling; Thermally active building systems (TABS); Thermal response; Response time; Heat storage efficiency; Effective thermal output; Thermal energy stored

Authors

KRAJČÍK, M.; ŠIKULA, O.

Released

15. 12. 2020

Publisher

Elsevier

Location

LAUSANNE

ISBN

0378-7788

Periodical

ENERGY AND BUILDINGS

Year of study

229

Number

1

State

Swiss Confederation

Pages from

1

Pages to

14

Pages count

14

URL

https://www.sciencedirect.com/science/article/pii/S037877882031937X

Full text in the Digital Library

http://hdl.handle.net/11012/208784

BibTex

@article{BUT166285,
  author="Michal {Krajčík} and Ondřej {Šikula}",
  title="Heat storage efficiency and effective thermal output: Indicators of thermal response and output of radiant heating and cooling systems",
  journal="ENERGY AND BUILDINGS",
  year="2020",
  volume="229",
  number="1",
  pages="1--14",
  doi="10.1016/j.enbuild.2020.110524",
  issn="0378-7788",
  url="https://www.sciencedirect.com/science/article/pii/S037877882031937X"
}