Originally Posted By: Shannow
Originally Posted By: SHOZ
A simple cycle gas turbine can achieve energy conversion efficiencies ranging between 20 and 35 percent. With the higher temperatures achieved in the Department of Energy's turbine program, future hydrogen and syngas fired gas turbine combined cycle plants are likely to achieve efficiencies of 60 percent or more. When waste heat is captured from these systems for heating or industrial purposes, the overall energy cycle efficiency could approach 80 percent.
You make my point again...and either don't get what you are saying or don't want to get it.
60s are where CCGTs are....that's the plant that is typically installed.
The 80 that you quoted as coming are only with waste heat district heating, which I'm not sure is going to go in anywhere in the US.
BUT as soon as you play the district heating card, you can apply it to anything.
http://cornerstonemag.net/setting-the-benchmark-the-worlds-most-efficient-coal-fired-power-plants/
Quote:
The HP and IP steam paths are combined in a common HP/IP module. Steam is passed back to the boiler for reheating before it continues through the IP and LP turbine modules. With the double-reheat cycle and cold seawater for cooling, Unit 3 boasts a net electrical efficiency of 47% (LHV basis). The asymmetric double-flow IP steam path (steam is received in the center of the cylinder and discharges at the ends) is configured to suit district heating requirements. Extracted steam is passed through two heat exchangers where water from the Aalborg city grid is heated to 80–90°C. This dual use allows Unit 3 to utilize up to 91% of the energy content in the bituminous coals it burns.
Cherry picking, I would thumb my nose and say that coal can be 91% efficient...BUT you can only make your customer's houses so warm, so it's sister units are stuck at their thermal efficiency...
Just like the majority of the CCGTs that will be built actually.
Seeing as thread is about nuke plants in the US and it taking 40 years to open one, the talk of either nuclear or coal is a non issue. Whereas natural gas generation is being rapidly installed and developed.
Originally Posted By: SHOZ
A simple cycle gas turbine can achieve energy conversion efficiencies ranging between 20 and 35 percent. With the higher temperatures achieved in the Department of Energy's turbine program, future hydrogen and syngas fired gas turbine combined cycle plants are likely to achieve efficiencies of 60 percent or more. When waste heat is captured from these systems for heating or industrial purposes, the overall energy cycle efficiency could approach 80 percent.
You make my point again...and either don't get what you are saying or don't want to get it.
60s are where CCGTs are....that's the plant that is typically installed.
The 80 that you quoted as coming are only with waste heat district heating, which I'm not sure is going to go in anywhere in the US.
BUT as soon as you play the district heating card, you can apply it to anything.
http://cornerstonemag.net/setting-the-benchmark-the-worlds-most-efficient-coal-fired-power-plants/
Quote:
The HP and IP steam paths are combined in a common HP/IP module. Steam is passed back to the boiler for reheating before it continues through the IP and LP turbine modules. With the double-reheat cycle and cold seawater for cooling, Unit 3 boasts a net electrical efficiency of 47% (LHV basis). The asymmetric double-flow IP steam path (steam is received in the center of the cylinder and discharges at the ends) is configured to suit district heating requirements. Extracted steam is passed through two heat exchangers where water from the Aalborg city grid is heated to 80–90°C. This dual use allows Unit 3 to utilize up to 91% of the energy content in the bituminous coals it burns.
Cherry picking, I would thumb my nose and say that coal can be 91% efficient...BUT you can only make your customer's houses so warm, so it's sister units are stuck at their thermal efficiency...
Just like the majority of the CCGTs that will be built actually.
Seeing as thread is about nuke plants in the US and it taking 40 years to open one, the talk of either nuclear or coal is a non issue. Whereas natural gas generation is being rapidly installed and developed.