Method and device for recovering energy

Abstract

Existing energy recovery systems are used in the fields of air conditioning and ventilation for recovering energy from the outgoing air or external air. Subsequent to an energy recovery system ( 10 ), additional thermal energy is extracted from a used air volume flow AB, which is coming from an air-conditioned room, by another system, which consists of a heat pump ( 3 ), a heat exchanger ( 1 ), another heat exchanger ( 2 ), an accumulator circuit ( 9 ), an energy accumulator ( 9.1 ), and of a mixing valve ( 6 ). The associated supply air volume flow ZU is, when heating, additionally heated by the heat pump ( 3 ) by means of thermal energy from the used air volume flow AB. This results in increasing the energy yield from the used air volume flow AB. The temperature of the supply air is regulated. When cooling, the supply air volume flow ZU is cooled to the desired supply air temperature.

1 - 26 . (canceled)  
   
   
       27 . A method for recovering energy in an air-conditioning or ventilation system, said air-conditioning or ventilation system having a heat recovery system connected to a supply air volume flow and a used air volume flow for transferring heat between the supply air volume flow and the used air volume flow and having a heat pump allocated to the heat recovery system for increasing energy transport between the supply air volume flow and the used air volume flow and coupled by means of heat exchangers to the supply air volume flow and/or to the used air volume flow, the method comprising: 
 exchanging thermal energy in the used air volume flow emerging from the heat recovery system by means of a first heat exchanger coupled to the heat pump;    transferring the exchanged thermal energy by means of the heat pump and a second heat exchanger coupled to the heat pump to a first accumulator circuit, the first accumulator circuit being coupled to the second heat exchanger for transferring thermal energy and containing a first energy accumulator; and    transferring the thermal energy transferred to the first accumulator circuit by means of a third heat exchanger to the supply air volume flow emerging from the heat recovery system for cooling or heating the supply air volume flow.    
   
   
       28 . A method according to  claim 27 , including the steps of: 
 removing thermal energy from the used air volume flow emerging from the heat recovery system by means of the first heat exchanger coupled to the heat pump,    transferring at least one part of the removed energy by means of the heat pump and the second heat exchanger coupled in the first accumulator circuit into the first accumulator circuit; and    transferring the energy transferred from the used air volume flow into the first accumulator circuit by means of the third heat exchanger for heating the supply air volume flow emerging from the heat recovery system.    
   
   
       29 . A method according to  claim 27 , including the steps of: 
 removing thermal energy from the supply air volume flow coming from the heat recovery system for cooling the supply air volume flow by means of the third heat exchanger coupled to the first accumulator circuit;    removing at least one part of the removed thermal energy by means of the heat pump and the second heat exchanger coupled in the first accumulator circuit from the accumulator circuit; and    transferring the thermal energy removed from the first accumulator circuit by means of the heat pump and the first heat exchanger to the used air volume flow emerging from the heat recovery system.    
   
   
       30 . A method according to  claim 29 , including the steps of: 
 removing thermal energy from the used air volume flow emerging from the heat recovery system for cooling the used air volume flow by means of adiabatic cooling; and    supplying the cooled used air volume flow to the first heat exchanger for transferring the thermal energy removed from the first accumulator circuit to the cooled used air volume flow.    
   
   
       31 . A method according to  claim 29 , including: 
 supplying thermal energy to the supply air volume flow emerging from the third heat exchanger connected to the first accumulator circuit for reheating the cooled supply air volume flow for humidity control by means of a fifth heat exchanger coupled to a hot gas circuit of the heat pump; and    supplying the heated supply air volume flow to an air-conditioned room.    
   
   
       32 . A method according to  claim 27 , including: 
 regulating the portion of the transmitted thermal energy in the third heat exchanger allocated to the supply air volume flow through control of an amount of throughput of a circulating fluid contained in the first accumulator circuit through the first energy accumulator and the third heat exchanger.    
   
   
       33 . A method according to one of  claim 27 , including applying a variable volume flow regulation of the used air volume flow and/or the supply air volume flow through the following processing steps: 
 exchanging thermal energy in the used air volume flow emerging from the heat recovery system by means of the heat exchanger with a second accumulator circuit containing a second energy accumulator;    transferring at least a portion of the exchanged thermal energy by means of a fourth heat exchanger coupled to the heat pump from the second accumulator circuit via the second heat exchanger coupled to the first accumulator circuit containing the first energy accumulator; and    transferring at least a portion of the thermal energy transferred in the first accumulator circuit by means of the third heat exchanger to the supply air volume flow emerging from the heat recovery system.    
   
   
       34 . A method according to  claim 33 , including regulating the portion of the transmitted thermal energy in the first heat exchanger allocated to the used air volume flow through control of the amount of throughput of a circulating fluid contained in the second accumulator circuit through the second energy accumulator and the first heat exchanger.  
   
   
       35 . A method according to claims  27 , including transferring energy by means of the heat pump between the supply air volume flow and the used air volume flow without the use of the heat recovery system.  
   
   
       36 . A device for recovering energy in an air-conditioning or ventilation system, the air-conditioning or ventilation system having a supply air volume flow and a used air volume flow and a heat recovery system connected to one of the supply air and the used air volume flows for transferring heat between the supply air and the used air volume flows, the heat recovery system containing a heat pump allocated to the heat recovery system for energy transport to the supply air volume flow or to the used air volume flow and coupled by means of heat exchangers to the supply air volume flow and/or to the used air volume flow, the device comprising: 
 a first accumulator circuit arranged between the heat pump and a third heat exchanger arranged after the heat recovery system in the supply air volume flow, wherein the heat transport in the accumulator circuit is regulated.    
   
   
       37 . A device according to  claim 36 , including: 
 a first heat exchanger arranged in the used air volume flow and coupled to the heat pump;    a second heat exchanger coupling the first accumulator circuit to the heat pump;    a first energy accumulator coupled in the first accumulator circuit, the third heat exchanger being coupled to the first accumulator circuit and arranged in the supply air volume flow; and    a device for regulating the supply air temperature of the supply air volume flow by controlling the throughput of circulating fluid in the first accumulator circuit through the heat exchanger and the first energy accumulator.    
   
   
       38 . A device according to  claim 37 , wherein the first heat exchanger is arranged to function as an evaporator or condenser of the heat pump.  
   
   
       39 . A device according to  claim 37 , wherein the second heat exchanger is arranged to function as a condenser or evaporator of the heat pump.  
   
   
       40 . A device according to  claim 37 , including: 
 a second accumulator circuit coupled by means of a fourth heat exchanger to the heat pump,    a second energy accumulator coupled in the second accumulator circuit; and    a device for regulating discharge of thermal energy to the used air volume flow by controlling throughput of circulating fluid in the second accumulator circuit through the fourth heat exchanger and the second energy accumulator for a variable volume flow regulation in the supply air or/and used air volume flow.    
   
   
       41 . A device according to  claim 40 , wherein the fourth heat exchanger coupling the second accumulator circuit to the heat pump is arranged to function as an evaporator or condenser of the heat pump.  
   
   
       42 . A device according to claims  36 , wherein the heat pump is switchable.  
   
   
       43 . A device according to claims  36 , including a device for adiabatically cooling the used air volume flow before entrance into a condenser of the heat pump for improving an output number of cooling of the supply air volume flow.  
   
   
       44 . A device according to claims  36 , including a device for reheating the supply air volume flow emerging from the third heat exchanger for regulating humidity of the supply air volume flow by means of thermal energy of the heat pump fed to a fifth heat exchanger arranged in the supply air volume flow.  
   
   
       45 . A device according to claims  36 , including an additional heating system coupled into the accumulator circuit by means of a sixth heat exchanger.  
   
   
       46 . A device according to  claim 45 , wherein the additional heating system includes a device of calorific-value technology.  
   
   
       47 . A device according to claims  36 , wherein the heat pump is used in the connection of the supply air volume flow and the used air volume flow without the use of the heat recovery system.  
   
   
       48 . A device according to claims  36 , including multiple supply air and used air devices combined into a single energy recovery system, wherein only one heat pump and only one accumulator circuit is provided with an energy accumulator.  
   
   
       49 . A device according to claims  36 , including multiple supply and used air devices combined into a single energy recovery system, wherein only one heat pump is provided, the heat pump being connected to two or more accumulator circuits with an energy accumulator for heating and an energy accumulator for refrigeration.  
   
   
       50 . A device according to claims  40 , including multiple supply and used air devices combined into a single energy recovery system, wherein only one heat pump is provided, the heat pump being connected to two or more accumulator circuits and in which one energy accumulator is provided for buffering heat or cold.  
   
   
       51 . A device according to  claim 50 , including one or more transfer points arranged independent of the heat pump for the transport of thermal energy on the accumulator circuit and/or on the energy accumulator.  
   
   
       52 . A device according to  claim 51 , including an external condenser/evaporator allocated to the heat pump.