The Effect of Solar Reflective Cover on Soak Air Temperature and Thermal Comfort of Car Parked under the Sun

A. A. Lahimer, M. A. Alghoul, Kamaruzzaman Sopian, N. G. Khrit

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Parking a vehicle under the sun for a short period of time can rapidly increase the interior air cabin temperature no matter in clear sky days or even in partially cloudy days. These circumstances can be anxieties to car occupants upon entry. The aim of this paper is to evaluate experimentally the effect of solar reflective cover (SRC) on vehicle air temperature and cabin thermal comfort. Experimental measurements of parked cars were conducted in UKM, Bangi city, Malaysia (latitude of 2.9° N and longitude of 101.78° E) under partially cloudy day where average ambient temperature is 33°C. The experimental measurements cover the following cases: case (I): car with/ without SRC (at different measurement time); Case (II): using two identical cars concurrently (SRC versus baseline); Case (III): using two identical cars concurrently (solar reflective film (SRF) versus baseline) and Case (IV): using two identical cars concurrently (SRF versus SRC). Experimental results dedicated to case (I) revealed that the maximum cabin air temperature with SRC (39.6°C) is significantly lower than that of baseline case (57.3°C). This leads to temperature reduction improvement of 31% and the difference between the cabin and the ambient air temperature was minimized by approximately 73%. In addition, the results revealed that the air temperature at breath level of car with SRC dropped to comfort temperature (27°C) after 7 min while baseline car reached comfort temperature after 14 min. Results of the other cases are discussed inside the paper. Overall, it is learned that SRC is found superior as an efficient thermal insulation system limits solar radiation transmission into the cabin through the glass; keeps cabin air temperature close to the ambient temperature; and provide acceptable thermal environment to the occupants as they settle into their parked car.

Original languageEnglish
Article number08003
JournalE3S Web of Conferences
Volume23
DOIs
Publication statusPublished - 20 Nov 2017

Fingerprint

Thermal comfort
Sun
automobile
Railroad cars
air temperature
Air
Temperature
temperature
effect
parking
clear sky
ambient air
Parking
Thermal insulation
solar radiation
Solar radiation
Time measurement
glass

Keywords

  • Cabin soak air temperature
  • Cabin thermal comfort
  • Parked vehicle under the sun
  • Solar reflective aluminum cover

ASJC Scopus subject areas

  • Environmental Science(all)
  • Energy(all)
  • Earth and Planetary Sciences(all)

Cite this

The Effect of Solar Reflective Cover on Soak Air Temperature and Thermal Comfort of Car Parked under the Sun. / Lahimer, A. A.; Alghoul, M. A.; Sopian, Kamaruzzaman; Khrit, N. G.

In: E3S Web of Conferences, Vol. 23, 08003, 20.11.2017.

Research output: Contribution to journalArticle

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