Detail publikace

Performant and Simple Numerical Modeling of District Heating Pipes with Heat Accumulation

KUDELA, L. CHÝLEK, R. POSPÍŠIL, J.

Originální název

Performant and Simple Numerical Modeling of District Heating Pipes with Heat Accumulation

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

This paper compares approaches for accurate numerical modeling of transients in the pipe element of district heating systems. The distribution grid itself affects the heat flow dynamics of a district heating network, which subsequently governs the heat delays and entire efficiency of the distribution. For an efficient control of the network, a control system must be able to predict how “temperature waves” move through the network. This prediction must be sufficiently accurate for real-time computations of operational parameters. Future control systems may also benefit from the accumulation capabilities of pipes. In this article, the key physical phenomena affecting the transients in pipes were identified, and an efficient numerical model of aboveground district heating pipe with heat accumulation was developed. The model used analytical methods for the evaluation of source terms. Physics of heat transfer in the pipe shells was captured by one-dimensional finite element method that is based on the steady-state solution. Simple advection scheme was used for discretization of the fluid region. Method of lines and time integration was used for marching. The complexity of simulated physical phenomena was highly flexible and allowed to trade accuracy for computational time. In comparison with the very finely discretized model, highly comparable transients were obtained even for the thick accumulation wall.

Klíčová slova

district heating; heat accumulation; pipe; numerical model; Modelica language; Julia language; performance

Autoři

KUDELA, L.; CHÝLEK, R.; POSPÍŠIL, J.

Vydáno

16. 2. 2019

Nakladatel

MDPI

Místo

Basel, Switzerland

ISSN

1996-1073

Periodikum

ENERGIES

Ročník

12

Číslo

4

Stát

Švýcarská konfederace

Strany od

1

Strany do

23

Strany počet

23

URL

https://www.mdpi.com/1996-1073/12/4/633

Plný text v Digitální knihovně

http://hdl.handle.net/11012/179568

BibTex

@article{BUT155925,
  author="Libor {Kudela} and Radomír {Chýlek} and Jiří {Pospíšil}",
  title="Performant and Simple Numerical Modeling of District Heating Pipes with Heat Accumulation",
  journal="ENERGIES",
  year="2019",
  volume="12",
  number="4",
  pages="1--23",
  doi="10.3390/en12040633",
  issn="1996-1073",
  url="https://www.mdpi.com/1996-1073/12/4/633"
}