Heating installation
A heating installation comprising: a first circuit (C 1 ); a second circuit (C 2 ); a first heat pump ( 4 ) for heating the medium in the first circuit; a heat exchanger ( 10 ) which is arranged in the second circuit and connected between a condenser ( 4 b ) and an expansion valve ( 4 d ) of the first heat pump; second and third heat pumps ( 11, 13 ) arranged for heating a medium by absorbing heat energy from the medium in the second circuit; and an accumulator tank ( 12 ) arranged in the second circuit downstream of the second heat pump ( 11 ). The accumulator tank is connected to an evaporator ( 13 a ) of the third heat pump ( 13 ) in order to allow medium to circulate between the accumulator tank and this evaporator so that heat exchange between the medium in the second circuit and a working medium of the third heat pump is possible via the evaporator of the third heat pump.
1. A heating installation comprising:
a first circuit (C 1 ) containing a medium;
a second circuit (C 2 ) containing a medium;
a first heat pump ( 4 ) arranged for heating the medium in the first circuit (C 1 );
a heat exchanger ( 10 ) which is arranged in the second circuit (C 2 ) and which is connected between a condenser ( 4 b ) and an expansion valve ( 4 d ) of the first heat pump ( 4 ) to transfer heat from a working medium of the first heat pump ( 4 ) to the medium in the second circuit (C 2 ); and
a second heat pump ( 11 ) arranged for heating a medium by absorbing heat energy from the medium in the second circuit (C 2 ), wherein
the second heat pump ( 11 ) has its input side connected to the second circuit (C 2 ) so that heat exchange between the medium in the second circuit (C 2 ) and a working medium of the second heat pump ( 11 ) is possible via an evaporator ( 11 a ) of the second heat pump ( 11 );
an accumulator tank ( 12 ), here denominated first accumulator tank, which is arranged in the second circuit (C 2 ) for accumulating the medium in the second circuit;
this accumulator tank ( 12 ) is arranged in the second circuit (C 2 ) downstream of the second heat pump ( 11 ) as seen in a flow direction from an outlet ( 10 b ) of said heat exchanger ( 10 ) to an inlet ( 10 a ) thereof;
the heating installation ( 1 ) comprises a third heat pump ( 13 ) arranged for heating a medium by absorbing heat energy from the medium in the second circuit (C 2 );
the first accumulator tank ( 12 ) is connected to an evaporator ( 13 a ) of the third heat pump ( 13 ) to allow medium to circulate between the first accumulator tank ( 12 ) and the evaporator ( 13 a ) of the third heat pump so that heat exchange between the medium in the second circuit (C 2 ) and a working medium of the third heat pump ( 13 ) is possible via the evaporator ( 13 a ) of the third heat pump;
the heating installation comprises an electronic control device ( 14 ) which is configured to control the circulation of medium between the first accumulator tank ( 12 ) and the evaporator ( 13 a ) of the third heat pump in dependence on one or more predetermined control variables;
said one or more control variables comprise a temperature value (T 1 ) representing the temperature of the medium flowing in the second circuit (C 2 ) from an outlet ( 15 ) of the first accumulator tank ( 12 ) in the direction towards said inlet ( 10 a ) of said heat exchanger ( 10 );
the heating installation ( 1 ) comprises a temperature sensor ( 16 ) which is connected to the electronic control device ( 14 ) and configured to establish this temperature value (T 1 );
the heating installation ( 1 ) comprises a circulation pump ( 17 ) which is arranged in a conduit between the first accumulator tank ( 12 ) and the evaporator ( 13 a ) of the third heat puma;
the electronic control device ( 14 ) is configured to control the circulation of medium between the first accumulator tank ( 12 ) and the evaporator ( 13 a ) of the third heat pump by controlling this circulation pump ( 17 );
the second circuit (C 2 ) comprises a feed conduit ( 18 ) which is connected to an inlet ( 13 g ) of the evaporator ( 13 a ) of the third heat pump and through which medium from the first accumulator tank ( 12 ) can be conveyed into the evaporator ( 13 a ) of the third heat pump, and a return conduit ( 19 ) which is connected to an outlet ( 13 h ) of the evaporator ( 13 a ) of the third heat pump and through which medium can be conveyed back to the first accumulator tank ( 12 ) from the evaporator ( 13 a ) of the third heat pump;
the second circuit (C 2 ) comprises a shunt conduit ( 20 ), via which said return conduit ( 19 ) is connected to said feed conduit ( 18 ) to allow medium flowing from the first accumulator tank ( 12 ) in the direction towards said inlet ( 13 g ) of the evaporator ( 13 a ) of the third heat pump to be mixed with medium which is returned via the shunt conduit ( 20 ) from said outlet ( 13 h ) to said inlet ( 13 g ) of the evaporator ( 13 a ) of the third heat pump;
the heating installation ( 1 ) comprises a regulating valve ( 21 ) for regulating the mixing proportion between medium flowing from the first accumulator tank ( 12 ) in the direction towards said inlet ( 13 g ) of the evaporator ( 13 a ) of the third heat pump and medium which is returned via said shunt conduit ( 20 ) from said outlet ( 13 h ) to said inlet ( 13 g ) of the evaporator ( 13 a ) of the third heat pump; and
the electronic control device ( 14 ) is configured to control said regulating valve ( 21 ) in dependence on a temperature value (T 2 ) representing the temperature of the medium flowing into the evaporator ( 13 a ) of the third heat pump via said inlet ( 13 g ) and/or a temperature value (T 3 ) representing the temperature of the medium flowing out of the evaporator ( 13 a ) of the third heat pump via said outlet ( 13 h ).
2. A heating installation according to claim 1 , wherein the evaporator ( 11 a ) of the second heat pump and the first accumulator tank ( 12 ) are arranged in the second circuit (C 2 ) in series with each other and in series with said heat exchanger ( 10 ).
3. A heating installation according to claim 1 , wherein
the heating installation ( 1 ) comprises a second accumulator tank ( 25 ) arranged in the second circuit (C 2 ) for accumulating the medium in the second circuit;
this second accumulator tank ( 25 ) is arranged in the second circuit (C 2 ) in series with and upstream of the first accumulator tank ( 12 ) as seen in said flow direction; and
the second accumulator tank ( 25 ) is connected to the second heat pump ( 11 ) to allow medium to circulate between the second accumulator tank ( 25 ) and the evaporator ( 11 a ) of the second heat pump.
4. A heating installation according to claim 1 , wherein the heating installation ( 1 ) comprises one or more heat emitting devices ( 7 ) which are arranged in the first circuit (C 1 ) to transfer heat from the medium in the first circuit (C 1 ) to air within a building.
5. A heating installation according to claim 4 , wherein the third heat pump ( 13 ) has its output side connected to the first circuit (C 1 ) so that heat exchange between the working medium of the third heat pump ( 13 ) and the medium in the first circuit (C 1 ) is possible via a condenser ( 13 b ) of the third heat pump ( 13 ).
6. A heating installation according to claim 4 , wherein the second heat pump ( 11 ) has its output side connected to the first circuit (C 1 ) so that heat exchange between the working medium of the second heat pump ( 11 ) and the medium in the first circuit (C 1 ) is possible via a condenser ( 11 b ) of the second heat pump ( 11 ).
7. A heating installation according to claim 1 , wherein
the heating installation ( 1 ) comprises a third circuit (C 3 ) containing a medium;
the second heat pump ( 11 ) has its output side connected to the third circuit (C 3 ) so that heat exchange between the working medium of the second heat pump ( 11 ) and the medium in the third circuit (C 3 ) is possible via a condenser ( 11 b ) of the second heat pump ( 11 ); and
the heating installation ( 1 ) comprises a heat emitting device ( 36 ) which is arranged in the third circuit (C 3 ) for heating tap hot-water by transferring heat from the medium in the third circuit (C 3 ) to water which is intended to be heated in order to provide tap hot-water.
8. A heating installation according to claim 7 , wherein the heating installation ( 1 ) comprises a third accumulator tank ( 37 ) for accumulating the tap hot-water heated by said heat emitting device ( 36 ).
9. A heating installation according to claim 8 , wherein said heat emitting device ( 36 ) comprises a heating coil ( 36 a ) which is arranged in third accumulator tank ( 37 ) and through which the medium in the third circuit (C 3 ) is allowed to flow to transfer heat from the medium in the third circuit (C 3 ) to the water in the third accumulator tank ( 37 ).
10. A heating installation according to claim 1 , wherein
the heating installation ( 1 ) comprises a further heat exchanger ( 43 ) which is arranged in the second circuit (C 2 ) to transfer heat from the medium in the second circuit (C 2 ) to another medium; and
this further heat exchanger ( 43 ) is connected to the first accumulator tank ( 12 ) to allow medium to circulate between the first accumulator tank ( 12 ) and this heat exchanger ( 43 ).
11. A heating installation according to claim 10 , wherein said further heat exchanger ( 43 ) is arranged to preheat tap hot-water by transferring heat from the medium in the second circuit (C 2 ) to water in a water supply line ( 41 ).
12. A heating installation comprising:
a first circuit (C 1 ) containing a medium;
a second circuit (C 2 ) containing a medium;
a first heat pump ( 4 ) arranged for heating the medium in the first circuit (C 1 );
a heat exchanger ( 10 ) which is arranged in the second circuit (C 2 ) and which is connected between a condenser ( 4 b ) and an expansion valve ( 4 d ) of the first heat pump ( 4 ) to transfer heat from a working medium of the first heat pump ( 4 ) to the medium in the second circuit (C 2 ); and
a second heat pump ( 11 ) arranged for heating a medium by absorbing heat energy from the medium in the second circuit (C 2 ), wherein
the second heat DUMP ( 11 ) has its input side connected to the second circuit (C 2 ) so that heat exchange between the medium in the second circuit (C 2 ) and a working medium of the second heat pump ( 11 ) is possible via an evaporator ( 11 a ) of the second heat pump ( 11 );
an accumulator tank ( 12 ), here denominated first accumulator tank, which is arranged in the second circuit (C 2 ) for accumulating the medium in the second circuit;
this accumulator tank ( 12 ) is arranged in the second circuit (C 2 ) downstream of the second heat pump ( 11 ) as seen in a flow direction from an outlet ( 10 b ) of said heat exchanger ( 10 ) to an inlet ( 10 a ) thereof;
the heating installation ( 1 ) comprises a third heat pump ( 13 ) arranged for heating a medium by absorbing heat energy from the medium in the second circuit (C 2 );
the first accumulator tank ( 12 ) is connected to an evaporator ( 13 a ) of the third heat pump ( 13 ) to allow medium to circulate between the first accumulator tank ( 12 ) and the evaporator ( 13 a ) of the third heat pump so that heat exchange between the medium in the second circuit (C 2 ) and a working medium of the third heat pump ( 13 ) is possible via the evaporator ( 13 a ) of the third heat pump;
the heating installation ( 1 ) comprises a second accumulator tank ( 25 ) arranged in the second circuit (C 2 ) for accumulating the medium in the second circuit;
this second accumulator tank ( 25 ) is arranged in the second circuit (C 2 ) in series with and upstream of the first accumulator tank ( 12 ) as seen in said flow direction;
the second accumulator tank ( 25 ) is connected to the second heat pump ( 11 ) to allow medium to circulate between the second accumulator tank ( 25 ) and the evaporator ( 11 a ) of the second heat pump;
the second circuit (C 2 ) comprises a feed conduit ( 28 ) which is connected to an inlet ( 11 g ) of the evaporator ( 11 a ) of the second heat pump and through which medium from the second accumulator tank ( 25 ) can be conveyed into the evaporator ( 11 a ) of the second heat pump, and a return conduit ( 29 ) which is connected to an outlet ( 11 h ) of the evaporator ( 11 a ) of the second heat pump and through which medium can be conveyed back to the second accumulator tank ( 25 ) from the evaporator ( 11 a ) of the second heat pump;
the second circuit (C 2 ) comprises a shunt conduit ( 30 ), via which the last-mentioned return conduit ( 29 ) is connected to the last-mentioned feed conduit ( 28 ) to allow medium flowing from the second accumulator tank ( 25 ) in the direction towards said inlet ( 11 g ) of the evaporator ( 11 a ) of the second heat pump to be mixed with medium which is returned via the shunt conduit ( 30 ) from said outlet ( 11 h ) to said inlet ( 11 g ) of the evaporator ( 11 a ) of the second heat pump;
the heating installation ( 1 ) comprises a regulating valve ( 31 ) for regulating the mixing proportion between medium flowing from the second accumulator tank ( 25 ) in the direction towards said inlet ( 11 g ) of the evaporator ( 11 a ) of the second heat pump and medium which is returned via said shunt conduit ( 30 ) from said outlet ( 11 h ) to said inlet ( 11 g ) of the evaporator ( 11 a ) of the second heat pump; and
an electronic control device ( 14 ) is configured to control said regulating valve ( 31 ) in dependence on a temperature value (T 4 ) representing the temperature of the medium flowing into the evaporator ( 11 a ) of the second heat pump via said inlet ( 11 g ) and/or a temperature value (T 5 ) representing the temperature of the medium flowing out of the evaporator ( 11 a ) of the second heat pump via said outlet ( 11 h ).
13. A heating installation according to claim 12 , wherein
the heating installation comprises an electronic control device ( 14 ) which is configured to control the circulation of medium between the first accumulator tank ( 12 ) and the evaporator ( 13 a ) of the third heat pump in dependence on one or more predetermined control variables;
said one or more control variables comprise a temperature value (T 1 ) representing the temperature of the medium flowing in the second circuit (C 2 ) from an outlet ( 15 ) of the first accumulator tank ( 12 ) in the direction towards said inlet ( 10 a ) of said heat exchanger ( 10 ); and
the heating installation ( 1 ) comprises a temperature sensor ( 16 ) which is connected to the electronic control device ( 14 ) and configured to establish this temperature value (T 1 ).
14. A heating installation according to claim 13 , wherein
the heating installation ( 1 ) comprises a circulation pump ( 17 ) which is arranged in a conduit between the first accumulator tank ( 12 ) and the evaporator ( 13 a ) of the third heat pump; and
the electronic control device ( 14 ) is configured to control the circulation of medium between the first accumulator tank ( 12 ) and the evaporator ( 13 a ) of the third heat pump by controlling this circulation pump ( 17 ).