Heat recovery system

Abstract

The invention relates to a heat recovery system. Said system comprises a heat recovery device having a plurality of heat recovery plates; a fluid supply means connectable to at least the heat recovery device. The heat recovery device is operable to supply a fluid at a first temperature to the fluid supply means; and a refrigeration assembly. The refrigeration assembly is operable to supply a fluid to the heat recovery device at a second temperature.

1 - 25 . (canceled) 
     
     
         26 . A heat recovery system comprising a heat recovery device having a plurality of heat recovery plates; a fluid supply means connectable to at least the heat recovery device; the heat recovery device being operable to supply a fluid at a first temperature to the fluid supply means; and a refrigeration assembly, the refrigeration assembly being operable to supply a fluid to the heat recovery device at a second temperature. 
     
     
         27 . A heat recovery system as claimed in  claim 26 , wherein the heat recovery plates are mounted substantially parallel to each other. 
     
     
         28 . A heat recovery system as claimed in  claim 27 , wherein the fluid is a hot exhaust gas. 
     
     
         29 . A heat recovery system as claimed in  claim 28  wherein the heat recovery device is located in an exhaust duct. 
     
     
         30 . A heat recovery system as claimed in  claim 29 , wherein the heat recovery device comprises a fluid inlet and a fluid outlet. 
     
     
         31 . A heat recovery system as claimed in  claim 30 , wherein fluid in the fluid outlet is at a temperature greater than fluid in the fluid inlet. 
     
     
         32 . A heat recovery system as claimed in  claim 31 , wherein a refrigeration assembly is located between the fluid inlet and the fluid outlet. 
     
     
         33 . A heat recovery system as claimed in  claim 32 , wherein the refrigeration assembly is an inverter driven refrigeration assembly. 
     
     
         34 . A heat recovery system as claimed in  claim 33 , wherein said assembly comprises an inverter compressor. 
     
     
         35 . A heat recovery system as claimed in  claim 34 , wherein a refrigerant is circulated through the refrigeration assembly, the refrigerant being R404a. 
     
     
         36 . A heat recovery system as claimed in  claim 35 , wherein the refrigeration assembly comprises at least one plate heat exchanger. 
     
     
         37 . A heat recovery system as claimed in  claim 36 , wherein two plate heat exchangers are provided, a first said exchanger being operable to cause heat exchange between the refrigeration assembly and the heat recovery device. 
     
     
         38 . A heat recovery system as claimed in  claim 37 , wherein a second plate heat exchanger is operable to cause heat exchange between the refrigeration assembly and a heat exchange system of a dwelling. 
     
     
         39 . A heat recovery system as claimed in  claim 38 , wherein the exhaust air flowrate is between substantially 0.5 and 100 m 3 /s. 
     
     
         40 . A heat recovery system as claimed in  claim 39 , wherein the exhaust air flowrate is substantially 3 m 3 /s. 
     
     
         41 . A heat recovery system as claimed in  claim 40 , wherein the refrigerant flowrate is between substantially 0.1 and 1 kg/s. 
     
     
         42 . A heat recovery system as claimed in  claim 41 , wherein the first temperature of the fluid is greater than the second temperature of the fluid. 
     
     
         43 . A heat recovery system as claimed in  claim 42 , wherein the fluid is re-circulated through the heat recovery device. 
     
     
         44 . A heat recovery system as claimed in  claim 43 , wherein seven heat recovery plates are provided in the heat recovery device. 
     
     
         45 . A heat recovery system as claimed in  claim 44 , wherein said plates are mounted perpendicular to a duct.