Turbine inlet cooling with thermal energy storage

Cole, Wesley; Rhodes, Joshua D.; Powell, Kody M.; Edgar, Thomas F.

doi:10.1002/er.3014

Cited by 9 publications

(5 citation statements)

References 42 publications

(58 reference statements)

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“…One of the algorithms used includes sequential quadratic programming. Cole et al (2014) considered a nonlinear model with capacity as a function of temperature, energy input ratio as a function of temperature and part load ratio and additional elements or constraints.…”

Section: State-of-the-art Optimization Of Inlet Cooling Systems With Tesmentioning

confidence: 99%

“…The term "heat rate" refers to the amount of thermal energy required to obtain 1 kWh of electricity and is in the form of reverse efficiency, usually applied in power plants. According to the various scientific papers and based on the type of GT used (aeroderivative GTs are more sensitive to ambient conditions compared to heavy duty GTs - Bhargava and Meher-Homji, 2005), a power output decrease of 0.5%-0.9% is observed for every 1°C increase in ambient temperature (Kakaras et al, 2004;Cole et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Thermal Energy Storage For Gas Turbine Power Augmentation

Gkoutzamanis

Chatziangelidou

Efstathiadis

et al. 2019

J. Glob. Power Propuls. Soc.

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This work is concerned with the investigation of thermal energy storage (TES) in relation to gas turbine inlet air cooling. The utilization of such techniques in simple gas turbine or combined cycle plants leads to improvement of flexibility and overall performance. Its scope is to review the various methods used to provide gas turbine power augmentation through inlet cooling and focus on the rising opportunities when these are combined with thermal energy storage. The results show that there is great potential in such systems due to their capability to provide intake conditioning of the gas turbine, decoupled from the ambient conditions. Moreover, latent heat TES have the strongest potential (compared to sensible heat TES) towards integrated inlet conditioning systems, making them a comparable solution to the more conventional cooling methods and uniquely suitable for energy production applications where stabilization of GT air inlet temperature is a requisite. Considering the system's thermophysical, environmental and economic characteristics, employing TES leads to more than 10% power augmentation.

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Section: State-of-the-art Optimization Of Inlet Cooling Systems With Tesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal Energy Storage For Gas Turbine Power Augmentation

Gkoutzamanis

Chatziangelidou

Efstathiadis

et al. 2019

J. Glob. Power Propuls. Soc.

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show abstract

“…In addition to the CHP plant providing power for the cooling system, the two are also linked by the turbine inlet cooling (TIC) system. The TIC system is used to pre-cool the ambient air before it i s fed to the gas turbine [36]. This increases the air density so that both the throughput and the efficiency of the gas turbine's compressor can be increased.…”

Section: System Overview This District Energy System Located At the Umentioning

confidence: 99%

Thermal energy storage to minimize cost and improve efficiency of a polygeneration district energy system in a real-time electricity market

Powell

Kim

Cole

et al. 2016

Energy

Self Cite

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Distributed energy systems can produce low-cost utilities for large energy networks, but can also be a resource for the electric grid by their ability to ramp production or to store thermal energy by responding to real-time market signals. In this work, dynamic optimization exploits the flexibility of thermal energy storage by determining optimal times to store and extract excess energy. This concept is applied to a polygeneration distributed energy system with combined heat and power, district heating, district cooling, and chilled water thermal energy storage. The system is a university campus responsible for meeting the energy needs of tens of thousands of people. The objective for the dynamic optimization problem is to minimize cost over a 24-hour period while meeting multiple loads in real time. The paper presents a novel algorithm to solve this dynamic optimization problem with energy storage by decomposing the problem into multiple static mixed-integer nonlinear programming (MINLP) problems. Another innovative feature of this work is the study of a large, complex energy network which includes the interrelations of a wide variety of energy technologies. Results indicate that a cost savings of 16.5% is realized when the system can participate in the wholesale electricity market. HIGHLIGHTS  A district energy system with central cooling, heating, and electricity generation is studied  The system is optimized over 24 hours using thermal energy storage to shift loads  A novel static/dynamic decomposition is used to solve the dynamic optimization problem  Scenarios with buying and selling electrical power in a real-time market are considered  Overall, a savings of 16.5% is achieved for a one-year period

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“…The best alternative option is the thermal energy storage, which shifts the chiller load to off-peak period and takes its place during on-peak period. Also, it can economically be considered much better than evaporative cooling (Cole et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Effect of Diffuser Height on Thermocline in Stratified Chilled Water Storage Tank

2021

JAFM

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Chilled water energy storage using thermal stratification technique currently used in the vast area because it contributes to reducing energy consumption and refrigeration capacity as well as its maintenance, operating and capital costs are low. In this paper, experimental tests were carried out on a small-scale vertical cylindrical storage tank equipped with an elbow-type conventional diffuser at inlet heights of 20, 170, 320 and 470mm for flow charging rates from 1.5-7.5l/min. in order to obtain a good thermal separation. The degree of stratification was estimated by means of temperature distributions and performance metrics, which involve thermocline thickness, the half-cycle figure of merit and equivalent lost tank height. The results show that the decrease in diffuser height above the tank floor tends to the steep thermocline or satisfactory thermal separation, the stratification and thermal performance were obtained at diffuser height of 20 mm within the limiting volume flow rates 1.5-4.5 l/min. better than those at volume flow rates ranging from 5.5-7.5l/min. and much better than at diffuser heights of 170, 320 and 470mm for various flow rates.

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Turbine inlet cooling with thermal energy storage

Cited by 9 publications

References 42 publications

Thermal Energy Storage For Gas Turbine Power Augmentation

Thermal Energy Storage For Gas Turbine Power Augmentation

Thermal energy storage to minimize cost and improve efficiency of a polygeneration district energy system in a real-time electricity market

Effect of Diffuser Height on Thermocline in Stratified Chilled Water Storage Tank

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