Publication detail

Development of PCM-to-air heat exchanger for integration in building envelope–modeling and validation

DARDIR, M. EL MANKIBI, M. HAGHIGHAT F. KLIMEŠ, L.

Original Title

Development of PCM-to-air heat exchanger for integration in building envelope–modeling and validation

Type

journal article in Web of Science

Language

English

Original Abstract

Earlier applications of phase change material (PCM)-to-air heat exchangers (PAHXs) reported the insufficient cooling charging energy needed for complete solidification of the PCM in free cooling systems. Also, the prediction of PAHX performance under low airflow regimes is a system limitation for free cooling applications. Besides, the implementation of the long wave thermal radiation cooling concept has not gained much attention in the free cooling design of PAHX units. This paper reports the development of PAHX system for building envelope applications that promotes the thermal radiation loss to the sky during night-time to maximize the cooling potential. A 2D numerical model has been developed considering the PCM thermal behavior, short and long wave radiation, and convection phenomena. New thermal boundaries of long-wave radiation have been proposed between system elements and the sky temperature. In addition, the model considered various forms of convective heat transfer phenomena. The apparent heat capacity method was used to simulate the thermal storage process. Experimentally obtained data and inter-model comparison were used to validate the proposed model. Two full-scale prototypes of the developed PAHX system were designed and tested under real conditions using two different types of PCMs. A parametric analysis was conducted to investigate the system thermal behavior under various air velocity profiles in the air channel and various inlet air temperature conditions. The results indicate that the building envelope integrated PAHX can use the sky radiation as a cooling source.

Keywords

Energy storage; Radiative cooling; PCM-to-air heat exchangers; Numerical modeling; Experimental validation

Authors

DARDIR, M.; EL MANKIBI, M.; HAGHIGHAT F.; KLIMEŠ, L.

Released

15. 9. 2019

Publisher

Elsevier

ISBN

0038-092X

Periodical

SOLAR ENERGY

Year of study

190

Number

1

State

United States of America

Pages from

367

Pages to

385

Pages count

19

URL

https://www.sciencedirect.com/science/article/pii/S0038092X1930773X

BibTex

@article{BUT158421,
  author="DARDIR, M. and EL MANKIBI, M. and HAGHIGHAT F. and KLIMEŠ, L.",
  title="Development of PCM-to-air heat exchanger for integration in building envelope–modeling and validation",
  journal="SOLAR ENERGY",
  year="2019",
  volume="190",
  number="1",
  pages="367--385",
  doi="10.1016/j.solener.2019.08.003",
  issn="0038-092X",
  url="https://www.sciencedirect.com/science/article/pii/S0038092X1930773X"
}