Energy system with a heat pump

Abstract

The invention provides a system for collection of thermal energy. The system comprises an energy collector, an energy reservoir, and an energy collection medium for circulation between the energy collector and the energy reservoir. Furthermore, the system comprises a heat pump which is adapted to decrease the temperature of the energy collection medium outside the energy collector.

1 . A system for collection of thermal energy, the system comprising an energy collector, an energy reservoir, and an energy collection medium for circulation between the energy collector and the energy reservoir, wherein the system further comprises a heat pump being adapted to decrease the temperature of the energy collection medium outside the energy collector. 
   
   
       2 . A system according to  claim 1 , wherein the heat pump is adapted for transportation of thermal energy from a first heat exchanger to a second heat exchanger, at least one of these heat exchangers being positioned so that thermal energy can be exchanged between the heat pump and the energy reservoir, and wherein the energy collector is coupled to the energy reservoir so that thermal energy can be transported from the energy collector to the energy reservoir by circulation of the energy collection medium. 
   
   
       3 . A system according to  claim 2 , wherein the energy collector is coupled to the energy reservoir via a third heat exchanger. 
   
   
       4 . A system according to  claim 2 , wherein the first heat exchanger is positioned so that it can collect thermal energy from the energy reservoir, and wherein the second heat exchanger is positioned so that it can supply thermal energy to the energy reservoir. 
   
   
       5 . A system according to  claim 4 , wherein the first heat exchanger is positioned substantially vertically below the second heat exchanger in the energy reservoir. 
   
   
       6 . A system according to  claim 2  further comprising an extra energy reservoir, wherein the first heat exchanger is positioned so that it can collect thermal energy from the energy reservoir, and the second heat exchanger is positioned so that it can supply thermal energy to the extra reservoir. 
   
   
       7 . A system according to  claim 2 , wherein the first heat exchanger is positioned so that it can collect thermal energy from the energy collection medium before the energy collection medium is received by the energy collector, and the second heat exchanger is positioned so that it can supply thermal energy to the energy reservoir. 
   
   
       8 . A system according to  claim 3 , wherein the second heat exchanger is positioned substantially above the third heat exchanger in the reservoir. 
   
   
       9 . A system according to  claim 1  further comprising a heater being adapted to heat the energy collection medium before the energy collection medium reaches the energy collector. 
   
   
       10 . A system according to  claim 1  further comprising a control system being adapted to control a first exchange of thermal energy between the energy collector and the energy reservoir and adapted to control a second exchange of thermal energy to and from the heat pump in such a way that the first and second exchange of thermal energy are controlled independently. 
   
   
       11 . A system according to  claim 2 , wherein the heat pump comprises a circuit for circulation of a refrigerant between the first and the second heat exchanger and cooling device for compression and expansion of the refrigerant during circulation in the circuit. 
   
   
       12 . A system according to  claim 11 , wherein the cooling device is adapted to establish a phase shift of the refrigerant during circulation in the circuit. 
   
   
       13 . A system according to  claim 1 , wherein the heat pump comprises one or more Peltier elements. 
   
   
       14 . A system according to  claim 1 , wherein the energy reservoir has a volume in the range of 10-20 litres. 
   
   
       15 . A system according to  claim 1 , wherein the energy reservoir has a volume in the range of 20-100 litres. 
   
   
       16 . A system according to  claim 1 , wherein the energy reservoir has a volume of more than 100 litres. 
   
   
       17 . A system according to  claim 1 , wherein the heat capacity of the energy reservoir is in the range of 5-100 kJ/K. 
   
   
       18 . A system according to  claim 1 , wherein the heat capacity of the energy reservoir is above 100 kJ/K. 
   
   
       19 . A system according to  claim 1 , wherein the heat capacity of the energy collector and the first heat exchanger is above 10 kJ/K. 
   
   
       20 . A system according to  claim 1 , further comprising a pipe connecting an inlet and an outlet of the energy collector, wherein the heat capacity of the energy collector, the first heat exchanger and the pipe is above 10 kJ/K.