Some aspects of controlling radiant and convective cooling systems

Forskningsoutput: Kapitel i bok/rapport/Conference proceedingKonferenspaper i proceeding

Abstract

Designing appropriate control systems for radiant heating and cooling terminals entails an understanding of their dynamic behaviour. This study experimentally investigates the dynamic response of a room with convective and radiant cooling systems. The experiments were performed in a 12.6 m2 large test room outfitted as a single-office room. The main cooling system was radiant ceiling panels which covered 70% of the ceiling area. The thermal performance of the radiant system was compared to that of a fan-coil unit (FCU). The results from the step response test showed that the time constant of the room for the radiant system was shorter than for the convective one, indicating faster changes in room temperature by the radiant system. Furthermore, controlling the FCU with similar control system tuned for ceiling panels increased the hysteresis gap in the room air temperature from 0.4 K to 0.8 K. This indicates that control systems for low-mass radiant systems and convective systems might be applied to each other, but on-site tuning is required to omit the offset (persistent error). In this study, controlling room temperature with ceiling panels did not benefit from using an operative temperature sensor to provide feedback signal to the control system. However, the pump energy use was moderately decreased by 14%.

Detaljer

Författare
  • Taha Arghand
  • Jan Olof Dalenbäck
  • Anders Trüschel
  • Saqib Javed
Externa organisationer
  • Chalmers Tekniska Högskola
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Husbyggnad
Originalspråkengelska
Titel på värdpublikationE3S Web of Conferences
RedaktörerS.I Tanabe, H. Zhang, J. Kurnitski, M.C. Gameiro da Silva, I. Nastase, P. Wargocki, G. Cao, L. Mazzarela, C. Inard
UtgivningsortLes Ulis
FörlagEDP Sciences
Antal sidor7
Volym111
StatusPublished - 2019 aug 13
PublikationskategoriForskning
Peer review utfördJa
Externt publiceradJa
Evenemang13th REHVA World Congress, CLIMA 2019 - Bucharest, Rumänien
Varaktighet: 2019 maj 262019 maj 29

Publikationsserier

NamnE3S Web of Conferences
FörlagEDP Sciences
ISSN (tryckt)2555-0403

Konferens

Konferens13th REHVA World Congress, CLIMA 2019
LandRumänien
OrtBucharest
Period2019/05/262019/05/29