Installation for utilizing surplus heat from a power transformer

Abstract

The invention relates to an installation for utilizing surplus heat from a power transformer. A first pipe system ( 7 ) is connected to the cooling device of the transformer for circulation of a first, heat carrying fluid between the transformer and a heat pump ( 5 ) with the purpose of enabling emission of heat to an evaporator ( 10 ) included in the heat pump, which evaporator via a second pipe system ( 11 ) containing a second fluid communicates with a compressor ( 12 ), a condenser ( 13 ) and an expansion valve ( 14 ), a third pipe system ( 15 ) having a third, heat carrying fluid for transfer of heat to one or more consumption units ( 16 ) being connected to the condenser. A fourth pipe system ( 19 ) is directly or indirectly connected to the first pipe system ( 7 ), which is partly brought down in a combined heat accumulator and emitter ( 20 ) in rock, ground and/or water, a multi-port valve ( 23 ) acting between the first and fourth pipe systems ( 7, 19 ) for enabling leading of surplus heat from the transformer via the first pipe system to either the evaporator ( 10 ) of the heat pump or said heat accumulator or emitter ( 20 ).

1 . Installation to utilize surplus heat from a power transformer ( 2 ) of the type that includes a cooling device ( 6 ) for cooling the windings of the transformer, characterized in that a first pipe system ( 7 ) is connected to the cooling device ( 6 ) of the transformer for circulation of a first, heat carrying fluid between the cooling device of the transformer and a heat pump ( 5 ) with the purpose of enabling emission of heat to an evaporator ( 10 ) included in the heat pump, which in a known way via a second pipe system ( 11 ) containing a second heat carrying fluid communicates with a compressor ( 12 ), a condenser ( 13 ) and an expansion valve ( 14 ), that a third pipe system ( 15 ) having a third heat carrying fluid for transfer of heat to one or more consumption units ( 16 ) is connected to the condenser ( 13 ) of the heat pump, that a fourth pipe system ( 19 ) is directly or indirectly connected to the first pipe system ( 7 ), which fourth pipe system is partly brought down in a heat accumulator or emitter ( 20 ) in a rock, ground and/or water, and that a multi-port valve ( 23 ) acts between the first and fourth pipe systems ( 7 ,  19 ) for leading surplus heat from the cooling device ( 6 ) of the transformer via the first pipe system ( 7 ) to the evaporator ( 10 ) of the heat pump and/or to said heat accumulator ( 20 ).  
     
     
         2 . Installation according to  claim 1 , characterized in that the first pipe system ( 7 ) is connected to a heat exchanger ( 9 ), which in turn is connected to the evaporator ( 10 ) of the heat pump ( 5 ) via a fifth pipe system ( 21 ), which communicates with the fourth pipe system ( 19 ) and contains the same heat carrying fluid as this, the multi-port valve ( 23 ) being arranged in a branch point between homologous pipes ( 19 ′,  21 ′) in said two pipe systems ( 19 ,  21 ).  
     
     
         3 . Installation according to  claim 1  or  2 , characterized in that the same is located in one and the same house ( 1 ) as the transformer ( 2 ) and that a heat indicator ( 28 ) is connected to a feeder pipe ( 15 ′) in the third pipe system ( 15 ) for heating the air inside the house.