Solar installation

Abstract

The solar installation ( 10 ) according to the invention having a collector array (K) and a heat storage container ( 20 ) has a drain-back holding device ( 24 ) which is integrated with a heat exchanger ( 22 ), which is located in the container ( 20 ), in that its upper area has an expansion and return volume. It is preferably in the form of an integral pipe coil (R), which is a smooth-pipe helix with a uniform gradient. Furthermore, a second heat exchanger ( 34 ) can be arranged, coaxially with respect to it. The pipe coil (R) has means, at least in the lower area, for reducing the free flow cross section in the pipe interior ( 32 ), specifically cylindrical or profiled, fixed or moving filling bodies ( 30 ) which, for example, are individual bodies, which are closed at the end, with a standard form which promotes swirling, and/or which may be composed of a material of high thermal capacity, such as steel, stone, ceramic or the like.

1 . A solar installation ( 10 ) having a collector array (K) which is connected by a forward line ( 14 ) and a return line ( 16 ), in places in particular in the form of a line pair ( 18 ), to a heat exchanger ( 22 ) of a heat storage container ( 20 ), with the return line ( 16 ) having a pump ( 26 ), possibly with a bypass ( 28 ) for it, and with a drain-back holding device ( 24 ) being provided on the forward side or return side, wherein the drain-back holding device ( 24 ) is located in the heat storage container ( 20 ) and is physically combined with the heat exchanger ( 22 ), which is in the form of an integral pipe coil and has an expansion and return volume in its upper area. 
     
     
         2 . The solar installation as claimed in  claim 1 , wherein the pipe coil (R) is a smooth-pipe helix with a uniform gradient. 
     
     
         3 . The solar installation as claimed in  claim 1 , wherein a reheating heat exchanger ( 34 ) is arranged above the pipe coil (R) in the heat storage container ( 20 ), preferably coaxially with respect to it. 
     
     
         4 . The solar installation as claimed in  claim 1 , wherein at least the lower area of the pipe coil (R) contains devices for reducing the free flow cross section in the interior, for example one or more filling bodies ( 30 ). 
     
     
         5 . The solar installation as claimed in  claim 1 , wherein the pump ( 6 ) is a centrifugal pump which is arranged directly under the heat storage container and feeds downward. 
     
     
         6 . The solar installation as claimed in  claim 1 , wherein a second pump ( 27 ) is arranged in the return line ( 16 ). 
     
     
         7 . The solar installation as claimed in  claim 1 , wherein the pumps ( 26 ,  27 ) are connected via a regulating device ( 40 ) to the collector temperature sensor ( 44 ) and to at least one store temperature ( 42 ). 
     
     
         8 . The solar installation as claimed in  claim 1 , wherein the store temperature sensor ( 42 ) is arranged above a sensor terminal strip ( 50 ) on the outside of the heat exchanger container ( 20 ). 
     
     
         9 . The solar installation as claimed in  claim 1 , wherein the heat exchanger ( 22 ) is or has a pipe arrangement which is provided in its interior ( 32 ) with means for reducing the free flow cross section. 
     
     
         10 . The solar installation as claimed in  claim 9 , wherein the pipe arrangement is a component of a pipe coil (R), which guides cylindrical or profiled filling bodies ( 30 ) in the interior ( 32 ), at least in its lower area ( 22 ). 
     
     
         11 . The solar installation as claimed in  claim 10 , wherein the filling bodies are in a standard, for example tubular, form. 
     
     
         12 . The solar installation as claimed in  claim 10 , wherein the filling bodies ( 30 ) are individual bodies which in particular are closed at the end and promote swirling. 
     
     
         13 . The solar installation as claimed in  claim 10 , wherein the filling bodies ( 30 ) are guided substantially concentrically in the pipe coil (R).