Brayton cycle: Difference between revisions
No edit summary |
No edit summary |
||
| (5 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
The Brayton cycle the basic thermal power cycle implemented in gas turbines. ASCEND provides support for modelling Brayton cycles with a range of models of increasing complexity. | The Brayton cycle the basic thermal power cycle implemented in gas turbines. ASCEND provides support for modelling Brayton cycles with a range of models of increasing complexity. | ||
The models are provided in the file {{src|models/johnpye/brayton.a4c}} | The models are provided in the file {{src|models/johnpye/fprops/brayton_fprops.a4c}}. These models make use of the [[FPROPS]] fluid properties library to obtain high-accuracy thermodynamic property evaluation. Some earlier models using ideal air as the working fluid are available in the model file {{src|models/johnpye/brayton.a4c}}. | ||
See also [[Combined-cycle gas turbine]] | See also [[Combined-cycle gas turbine]] | ||
{{incomplete}} | |||
== Split Brayton Cycle == | == Split Brayton Cycle == | ||
This cycle has been identified as highly efficient when the working gas is supercritical carbon dioxide (sCO2). The configuration is shown below. | This cycle has been identified as highly efficient when the working gas is supercritical carbon dioxide (sCO2), and is under active development for potential use in next-generation solar thermal and nuclear power plants<ref>http://www.netl.doe.gov/publications/proceedings/11/utsr/pdf/wed/Wright%20SCO2%20Power%20Cycle%20Summary%20UTSR%202011%20v2a.pdf</ref><ref>http://www.nrel.gov/docs/fy11osti/50787.pdf</ref>. The configuration is shown below. | ||
[[Image:Split-brayton-cycle-config.png|400px|thumb|none|Split Brayton cycle configuration (Figure: Rachel Hogan)]] | [[Image:Split-brayton-cycle-config.png|400px|thumb|none|Split Brayton cycle configuration (Figure: Rachel Hogan)]] | ||
The model <tt>brayton_split_co2</tt>, contained in the file {{src|models/johnpye/brayton_split.a4c}}, implements this cycle. The T-s diagram of the cycle in our default configuration is shown below: | The model <tt>brayton_split_co2</tt>, contained in the file {{src|models/johnpye/fprops/brayton_split.a4c}}, implements this cycle. The T-s diagram of the cycle in our default configuration is shown below: | ||
[[Image:Split-brayton-cycle-Ts.png|400px|thumb|none|T-s diagram for the split Brayton cycle]] | [[Image:Split-brayton-cycle-Ts.png|400px|thumb|none|T-s diagram for the split Brayton cycle]] | ||
== | == Regenerative Brayton cycle == | ||
{{ | |||
[[Image:Brayton-regen-cycle-config.png|400px|thumb|none|Regenerative Brayton cycle configuration (Figure: Rachel Hogan)]] | |||
This cycle is implemented in the model <tt>brayton_regen</tt>, contained in the file {{src|models/johnpye/fprops/brayton_fprops.a4c}}. The T-s diagram of the cycle in our default configuration is shown below: | |||
[[Image:Brayton-regen-Ts.png|400px|thumb|none|T-s diagram for the regenerative Brayton cycle]] | |||
== Regenerative Brayton cycle with reheat and intercooling == | |||
This cycle is an improvement on the simple regenerative Brayton cycle as it allows the compression and expansion to take place at closer to a uniform temperature, increasing the area inside T-s cycle loop. The model is shown here is <tt>brayton_regen_reheat_intercool_co2</tt> from {{src|models/johnpye/fprops/brayton_fprops.a4c}}. | |||
[[Image:Brayton-rri-config.png|400px|thumb|none|Configuration of the regenerative Brayton cycle with reheat and intercooling (Figure: Rachel Hogan)]] | |||
[[Image:Brayton-rri-Ts.png|400px|thumb|none|T-s diagram for the regenerative Brayton cycle with reheat and intercooling]] | |||
== References == | |||
<references/> | |||
[[Category:Examples]] | [[Category:Examples]] | ||
[[Category:Documentation]] | [[Category:Documentation]] | ||
[[Category:Energy systems]] | [[Category:Energy systems]] | ||
Latest revision as of 06:10, 14 January 2014
The Brayton cycle the basic thermal power cycle implemented in gas turbines. ASCEND provides support for modelling Brayton cycles with a range of models of increasing complexity.
The models are provided in the file models/johnpye/fprops/brayton_fprops.a4c. These models make use of the FPROPS fluid properties library to obtain high-accuracy thermodynamic property evaluation. Some earlier models using ideal air as the working fluid are available in the model file models/johnpye/brayton.a4c.
See also Combined-cycle gas turbine
Split Brayton Cycle
This cycle has been identified as highly efficient when the working gas is supercritical carbon dioxide (sCO2), and is under active development for potential use in next-generation solar thermal and nuclear power plants[1][2]. The configuration is shown below.
The model brayton_split_co2, contained in the file models/johnpye/fprops/brayton_split.a4c, implements this cycle. The T-s diagram of the cycle in our default configuration is shown below:
Regenerative Brayton cycle
This cycle is implemented in the model brayton_regen, contained in the file models/johnpye/fprops/brayton_fprops.a4c. The T-s diagram of the cycle in our default configuration is shown below:
Regenerative Brayton cycle with reheat and intercooling
This cycle is an improvement on the simple regenerative Brayton cycle as it allows the compression and expansion to take place at closer to a uniform temperature, increasing the area inside T-s cycle loop. The model is shown here is brayton_regen_reheat_intercool_co2 from models/johnpye/fprops/brayton_fprops.a4c.
