Method for determination of carbon dioxide emissions from combustion sources used to heat a working fluid
AssigneeALSTOM Technology Ltd
InventorMatthew Joseph Dooley
Life of this patent
Estimating the term…
Abstract
A method for determining carbon emissions from a steam generation system is disclosed. It includes measuring a first energy of feedwater entering into a steam generation system and measuring a second energy of steam exiting the steam generation system. The first energy is subtracted from the second energy to determine a total energy absorbed by the steam generation system. The total energy absorbed by the steam generation system is divided by the total energy to determine a heat input to the steam generation system. The heat input is used to determine the carbon emissions from the steam generation system.
Claims30
A method comprising:
- measuring a first energy of feedwater entering into a steam generation system;
- where the steam generation system is a boiler;
- measuring a second energy of steam or water exiting the steam generation system;
- subtracting a difference between the first energy and the second energy to determine a total energy absorbed by the steam generation system;
- dividing the total energy absorbed by the steam generation system by an efficiency of the steam generation system to determine a heat input to the steam generation system;
- determining the carbon emissions from the heat input to the steam generation system;
- where the heat input is obtained from the combustion of carbon based fuels;
- and
- controlling the carbon emissions by adjusting a flow of feedwater or steam;
- where the first energy and the second energy are both heat energies related to the mass and enthalpy of the feedwater entering into the steam generation system and the steam of water exiting the steam generation system respectively;
- and where the carbon emissions can be determined from the Equations below:
- Mq
-
-
- C
-
-
- O
- 2
- =
- MFrCF
- HHV
- ×
- MW
- C
-
-
- O
- 2
- MW
- C
- ×
- 10
- 6
-
-
- pounds
-
-
- of
-
-
- carbon
-
-
- dioxide
-
-
- per
-
-
- million
-
-
- BTU
- ,
- Me
-
-
- C
-
-
- O
- 2
- =
- Mq
-
-
- C
-
-
- O
- 2
- kW
- ×
- Q
- FIRED
-
-
- pounds
-
-
- of
-
-
- carbon
-
-
- dioxide
-
-
- per
-
-
- kilowatt
- ,
-
- and
- Mte
-
-
- C
-
-
- O
- 2
- =
- Mq
-
-
- C
-
-
- O
- 2
- 2000
- ×
- Q
- FIRED
-
-
- tons
-
-
- of
-
-
- carbon
-
-
- dioxide
-
-
- per
-
-
- hour
- ,
- MqCO2, MeCO2 and MteCO2 are masses in pounds per BTU of carbon dioxide, mass of carbon dioxide emissions on a per kW basis and mass of carbon dioxide emissions on a ton per hour basis respectively, MFrCF is the mass fraction of carbon in the fuel, MqCO2 is a mass in pounds per BTU of carbon dioxide, MWCO2 is the molecular weight of carbon dioxide respectively, MWc is the molecular weight of carbon and QFIRED is the heat input to the steam generation system.
A method comprising:
- calculating the total energy absorbed by a working fluid in a boiler as it undergoes a change of state;
- dividing the total energy absorbed by the boiler by an efficiency of the boiler to determine a heat input to the boiler;
- and
- determining carbon emissions from the heat input to the boiler;
- and
- controlling the carbon emissions by adjusting a flow of feedwater or steam;
- and where the carbon emissions can be determined from the Equations below:
- Mq
-
-
- C
-
-
- O
- 2
- =
- MFrCF
- HHV
- ×
- MW
- C
-
-
- O
- 2
- MW
- C
- ×
- 10
- 6
-
-
- pounds
-
-
- of
-
-
- carbon
-
-
- dioxide
-
-
- per
-
-
- million
-
-
- BTU
- ,
- Me
-
-
- C
-
-
- O
- 2
- =
- Mq
-
-
- C
-
-
- O
- 2
- kW
- ×
- Q
- FIRED
-
-
- pounds
-
-
- of
-
-
- carbon
-
-
- dioxide
-
-
- per
-
-
- kilowatt
- ,
-
- and
- Mte
-
-
- C
-
-
- O
- 2
- =
- Mq
-
-
- C
-
-
- O
- 2
- 2000
- ×
- Q
- FIRED
-
-
- tons
-
-
- of
-
-
- carbon
-
-
- dioxide
-
-
- per
-
-
- hour
- ,
- MqCO2, MeCO2 and MteCO2 are masses in pounds per BTU of carbon dioxide, mass of carbon dioxide emissions on a per kW basis and mass of carbon dioxide emissions on a ton per hour basis respectively, MFrCF is the mass fraction of carbon in the fuel, MqCO2 is a mass in pounds per BTU of carbon dioxide, MWCO2 is the molecular weight of carbon dioxide respectively, MWc is the molecular weight of carbon and QFIRED is the heat input to the steam generation system.
Dependencies are inferred from the claim text.