Implementation of heat exchange and storage systems attached to CCGTs is delivering greater demand-response for plant operators, delegates at PowerGen heard. The Italian utility IREN uses heat storage tanks at three gas power plants around Turing – optimizing between the sales of electricity and district heating.
As for generating district heating from CHP sources, gas engine-driven power plants offer numerous advantages over classic gas combined-cycle power plants, a comparative study by the Essen-Duisburg University and MAN Diesel & Turbo shows. Engine-driven CHPs were found to be “operationally superior”, both in terms of energy efficiency as well as cost-effectiveness.
Accelerated growth of volatile wind and photovoltaic power supply in Germany has been shifting the dispatch of fossil power plants to load-following operation to maintain the stability of the power grid. More decentralized gas-fired stations would help meet TSO’s flexibility requirements, Dr. Thorsten Krol, marketing manager at Siemens’ distributed generation business development told Gas to Power Journal.
Flexibility of power network hinges on storing excess electricity and demand response to alleviate the impact of intermittent generation. California and Germany used subsidies as a trigger to advance power storage; yet to further commercialise these technologies the industry needs market-based regulation that remunerates flexibility and puts in place a level playing field between different assets.
Ener-Core has initiated a full scale acceptance test, connecting its first-ever 2 MW power oxidizer with the Dresser-Rand KG2-3G gas turbine. Following successful testing, Siemens-owned Dresser-Rand will assemble and ship two commercial 2 MW systems to Pacific Ethanol, who placed the first purchase order for this technology.
Construction and fuel costs determine the economics of electric generator technology, while markets and price drivers alter patterns of which type of capacity is being added, an EIA analysis finds. As for gas generation, construction costs in the US averaged at $965/kW in 2013 while building new wind power installationscost $1,895/kW, supported by tax credits at the time.
A policy session on the role of micro gas turbines amid the rise of green energy production will be held by ETN, COGEN and AEBIOM during the upcoming EU Sustainable Energy Week. A system approach is needed so that decentralised gas generators can effectively contribute to the decarbonisation of the power mix.
SmartSet Couplings, designed by Voith, limit the torque between the generator and the turbine in the event of a sudden voltage drop in the power system, allowing continuous plant operation. The risk of critical voltage fluctuations increases due to rising alignment of the grid to renewables and distributed power.
AG&P is looking to partner with private developers in building small-scale LNG facilities that can deliver 5 to 20 MW of decentralised power. Commenting on average investment needs, AG&P President Albert D. Altura said: “The rule-of-thumb for LNG, and this is highly dependent on the area, is about $1 million per megawatt for small-scale projects.”