Method for heating a road by means of geothermally fed heating installation as well as a road-heating installation for carrying out the method
First Claim
1. A method for heating a road by means of a heating installation fed with heat stored in the ground which includes heat pipes placed in a heat conducting manner near the surface of the road, each having a condensation zone extending directly underneath the road surface and an evaporation extending to a depth in the ground for a heat carrier medium present in the heat pipes, sensors for detecting the determinative factors of the climate, of the road condition and of the heat pipes for a control apparatus, comprising the steps of blocking the heat transfer capacity of the heat pipes with a dry-cold by quantity regulated introduction of inert gas into the condensation zones of the heat pipes and by cancelling the blockage with changed prerequisites by an also regulated return of the inert gas out of the condensation zones.
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Accused Products
Abstract
A road heating installation which is supplied by heat stored in the ground and which includes heat pipes placed heat-conductingly with the road surface, is provided with sensors for detecting the climate factors relevant for the road condition and is equipped with a control apparatus that controls the heating installation as a function of the climate. In order to remove the heat energy stored in the ground only in case of need and to avoid the unnecessary exhaustion thereof, the invention provides that the heat transfer capacity of the heat pipe is controllable by a reversible blocking of the condensation zones of the heat pipes and the blocking is brought about in case of a dry-cold by the supply of an inert gas into the condensation zones of the heat pipes which is quantity-regulatable directly from the outside.
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Citations
28 Claims
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1. A method for heating a road by means of a heating installation fed with heat stored in the ground which includes heat pipes placed in a heat conducting manner near the surface of the road, each having a condensation zone extending directly underneath the road surface and an evaporation extending to a depth in the ground for a heat carrier medium present in the heat pipes, sensors for detecting the determinative factors of the climate, of the road condition and of the heat pipes for a control apparatus, comprising the steps of blocking the heat transfer capacity of the heat pipes with a dry-cold by quantity regulated introduction of inert gas into the condensation zones of the heat pipes and by cancelling the blockage with changed prerequisites by an also regulated return of the inert gas out of the condensation zones.
- 2. A road heating installation, comprising heat pipe means placed heat conductingly near the road surface, each heat pipe means including a condensation zone extending directly underneath the road surface and an evaporation zone extending to a depth in the ground for a heat carrier medium disposed within the heat pipe means, sensor means for detecting the determinative factors of the climate, of the road condition and of the heat pipe means, and a control apparatus including control means, the output of the sensor means being fed as inputs to the control apparatus, and said control means being operable to block the heat transfer output of the heat pipe means with a dry-cold by quantity controlled introduction of an inert gas into the condensation zones of heat pipe means and by cancelling the blockage by controlled return of the inert gas out of the condensation zones with changed prerequisites.
Specification