Method of and apparatus for producing power in remote locations

Abstract

A system for producing power at remote locations comprises: a closed cycle vapor turbine unit having an evaporator containing liquid working fluid, a turbine receiving vapor of the evaporated working fluid for producing power by way of an electrical generator coupled to the turbine, a condenser and means for returning the working fluid condensate from the condenser to the evaporator; a biomass furnace associated with the evaporator for heating working fluid present in the evaporator and evaporating a portion of the working fluid; and a controller for controlling the amount of biomass fuel supplied to the biomass furnace in accordance with energy requirements of a customer load. Further, a method for producing power using the system is also provided.

1 . A system for producing power at remote locations comprising: 
 (a) a closed cycle vapor turbine unit having an evaporator containing liquid working fluid, a turbine receiving vapor of the evaporated working fluid for producing power by way of an electrical generator coupled to said turbine, a condenser and means for returning the working fluid condensate from the condenser to the evaporator;    (b) a biomass furnace associated with said evaporator for heating working fluid present in the evaporator and evaporating a portion of said working fluid; and    (c) a controller for controlling the amount of biomass fuel supplied to said biomass furnace in accordance with energy requirements of a customer load.    
     
     
         2 . A system for producing power according to  claim 1  wherein said controller for controlling the amount of fuel supplied to said biomass furnace further controls the amount of biomass fuel supplied to said biomass furnace also in accordance with a control signal from a buffer load connected to the output of said generator.  
     
     
         3 . A system for producing power according to  claim 2  wherein said controller for controlling the amount of biomass fuel supplied to said biomass furnace additionally controls the amount of biomass fuel supplied to the biomass furnace also in accordance with a monitored evaporator temperature.  
     
     
         4 . A system for producing power according to  claim 2  wherein said buffer load comprises a pulse width modulator.  
     
     
         5 . A system for producing power according to  claim 1  including an oxygen sensor located at the exit of said evaporator for controlling the air/fuel ratio in the biomass furnace.  
     
     
         6 . A system for producing power according to  claim 1  wherein said working fluid is an organic fluid.  
     
     
         7 . A system for producing power according to  claim 1  wherein said means for returning the working fluid from the condenser to the evaporator comprises a pump.  
     
     
         8 . A system for producing power according to  claim 1  further comprising a line for supplying flue gases exiting said evaporator to biomass fuel for drying said biomass fuel.  
     
     
         9 . A system for producing power according to  claim 1  further comprising a solar parabolic concentrating system for providing heat to the working fluid.  
     
     
         10 . A method for producing power in remote locations comprising the steps of: 
 (a) providing a closed cycle vapor turbine unit having an evaporator containing liquid working fluid, a turbine receiving vapor of the evaporated working fluid for producing power by way of an electrical generator coupled to said turbine, a condenser and means for returning the working fluid condensate from the condenser to the evaporator;    (b) heating said working fluid present in the evaporator and evaporating portion of said working fluid using a biomass furnace associated with said evaporator; and    (c) controlling the amount of biomass fuel supplied to said biomass furnace in accordance with energy requirements of a customer load.    
     
     
         11 . A method according to  claim 10  wherein the step of controlling the amount of biomass fuel supplied to said biomass furnace further includes the step of controlling the amount of biomass fuel supplied to said biomass furnace also in accordance with a control signal from a buffer load connected to the output of said generator.  
     
     
         12 . A method according to  claim 11  wherein the step of controlling the amount of biomass fuel supplied to said biomass furnace additionally includes the step of controlling the amount of biomass fuel supplied to said biomass furnace also in accordance with a monitored evaporator temperature.  
     
     
         13 . A method according to  claim 11  wherein the step of controlling the amount of biomass fuel supplied to said biomass furnace also in accordance with a control signal from a buffer load connected to the output of said generator is carried out using a pulse width modulator.  
     
     
         14 . A method according to  claim 10  including the step of controlling the air/fuel ration in the biomass furnace using an oxygen sensor located at the exit of said evaporator.  
     
     
         15 . A method according to  claim 10  including the step of using an organic fluid for the working fluid.  
     
     
         16 . A method according to  claim 10  wherein flue gases exiting said evaporator are used to dry the biomass fuel.  
     
     
         17 . A method according to  claim 10  further including the step of providing heat to the working fluid using a solar parabolic concentration system.