HEATING OF ROADS. HEAT CONSUMPTION AND HEAT OUTPUT AS A FUNCTION OF CLIMATE, CONSTRUCTION, DEMANDS ON SURFACE CONDITIONS AND PRINCIPLE OF HEAT SUPPLY

UPPVAERMNING AV VAEGAR. ENERGIFOERBRUKNING OCH EFFEKTBEHOV SOM FUNKTION KLIMATFAKTORER, KONSTRUKTION, KRAV PAA YTFOERHAALLANDEN OCH UPPVAERMNINGSSTRATEGI

In this work analytical formulas for calculation of temperatures in a heated roadbed are given. In addition heat flux from a heated road surface, snow clearance methods on different types of road and on construction work were studied. The analytical formulas were evaluated by comparison between calculated temperatures and temperatures measured in field and laboratory. The heat transfer coefficients in those formulas have been developed empirically by tests in laboratory and field. The coefficient was found to be 10.0 w/(sq M deg C) due to radiation by bright sky, 3.5 w/(sq M deg C) due to radiation by overcast sky, 9.3 + 2.1 V w/(sq M deg C) due to convection for dry surfaces and 12.5 + 2.3 V w/(sq M deg C) due to convection and evaporation for wet surfaces, where V is the wind speed measured at 10 M. Surfaces with different types of traffic were divided into three classes according to snow removal requirements. The construction work was divided into cost elements. This has given a basis for calculating the economic effects of alternative designs. /TRRL/

• Corporate Authors:

  Chalmers University of Technology, Sweden

  Department of Applied Mechanics/CHARMEC
  Gothenburg,   Sweden 
• Publication Date: 1977

Language

• Swedish

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: 186 p.

Subject/Index Terms

• TRT Terms: Airports; Calculation; Climate; Coefficients; Construction; Costs; Field tests; Heat; Heat flow; Heat transfer; Heating (Structures); Highway design; Highway maintenance; Laboratories; Mathematical models; Pavement design; Pavements; Roads; Snow and ice control; Snow removal; Surfacing; Temperature; Temperature measurement; Tests; Transfer characteristics
• Uncontrolled Terms: Pavement heating
• Old TRIS Terms: Pavement costs
• ITRD Terms: 6464: Calculation; 3655: Construction; 224: Cost; 6743: Heat; 6226: In situ; 6237: Laboratory (not an organization); 6473: Mathematical model; 2556: Road heating; 2542: Snow clearance; 2972: Surfacing; 6722: Temperature; 6710: Temperature measurement; 6255: Test; 6731: Transfer (phys)
• Subject Areas: Aviation; Construction; Finance; Highways; Maintenance and Preservation; Pavements; Terminals and Facilities; I10: Economics and Administration; I62: Winter Maintenance;

Filing Info

• Accession Number: 00178610
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Thesis
• Files: ITRD, TRIS
• Created Date: Sep 14 1978 12:00AM