RELATION BETWEEN THE DEFOGGING AREA AND POWER LEVEL FOR ELECTRICALLY HEATED REAR WINDOW OF AUTOMOBILE

A two-dimensional heat conduction model is developed in order to estimate the power requirement for electrically heated backlight. The calculations show a fairly good agreement with the experiments in a test chamber, which indicates that the model is useful for the design of power requirement. On the basis of numerical calculations, it is determined that a power level of 400 w/sq.m is adequate under common environmental conditions, and 550 w/sq.m sufficient for severe conditions. Moreover, the model is applied to the automatic defogging system with a humidity sensor, and the optimum position of the sensor and its sensing level of humidity are determined. /Author/TRRL/

  • Corporate Authors:

    International Federation of Auto Techniques Engs

    3 Avenue du President Wilson
    F 75116 Paris,   France 
  • Authors:
    • Mizushima, E
    • Ohsato, N
    • Tanaka, K
  • Publication Date: 0

Media Info

  • Pagination: 1 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00163330
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Analytic
  • Files: ITRD, TRIS
  • Created Date: Apr 12 1978 12:00AM