The equivalent low-dissipation combined cycle system and optimal analyses of a class of thermally driven heat pumps

2020 ◽  
Vol 220 ◽  
pp. 113100
Author(s):  
Juncheng Guo ◽  
Hanxin Yang ◽  
Julian Gonzalez-Ayala ◽  
J.M.M. Roco ◽  
A. Medina ◽  
...  
Keyword(s):  
Heat Pumps ◽  
Combined Cycle ◽  
Cycle System ◽  
Low Dissipation ◽  
Thermally Driven

scholarly journals Dynamic simulation of a combined cycle for power plant flexibility enhancement

2019 ◽  
Vol 113 ◽  
pp. 01005
Author(s):  
Adrien Reveillere ◽  
Martin Longeon ◽  
Iacopo Rossi
Keyword(s):  
Power Plant ◽  
Dynamic Models ◽  
Real Life ◽  
Heat Pumps ◽  
Combined Cycle ◽  
Industrial Systems ◽  
Virtual Plant ◽  
Balance Of Plant ◽  
Real Life Data ◽  
Combined Cycles

System simulation is used in many fields to help design, control or troubleshoot various industrial systems. Within the PUMP-HEAT H2020 project, it is applied to a combined cycles power plant, with innovative layouts that include heat pumps and thermal storage to un-tap combined cycle potential flexibility through low-CAPEX balance of plant innovations. Simcenter Amesim software is used to create dynamic models of all subsystems and their interactions and validate them from real life data for various purpose. Simple models of the Gas Turbine (GT), the Steam loop, the Heat Recovery Steam Generator (HRSG), the Heat Pump and the Thermal Energy storage with Phase Change material are created for Pre-Design and concept validation and then scaled to more precise design. Control software and hardware is validated by interfacing them with detailed models of the virtual plant by Model in the Loop (MiL), Software in the Loop (SiL) and Hardware in the Loop (HiL) technologies. Unforeseen steady state and transient behaviours of the powerplant can be virtually captured, analysed, understood and solved. The purpose of this paper is to introduce the associated methodologies applied in the PUMP-HEAT H2020 project and their respective results.

scholarly journals Reaching for 60 Percent

2002 ◽  
Vol 124 (04) ◽  
pp. 35-39 ◽  
Author(s):  
Michael Valenti
Keyword(s):  
New York ◽  
High Pressure ◽  
Fuel Economy ◽  
Environmental Performance ◽  
New York State ◽  
Combined Cycle ◽  
York State ◽  
Cycle System ◽  
The World ◽  
H Design

The General Electric (GE) H turbine system in Wales is designed to be 60% thermally efficient. The Welsh installation will serve as a springboard for two other installations, planned for New York State and Tokyo, so that the technology will span three continents. The 480-megawatt H system in Wales is designed to be the first gas turbine combined-cycle system in the world to achieve 60% thermal efficiency. The main advantage provided by efficiency is economic, because fuel represents the largest single expense in running a fossil-fueled power plant. GE engineers based much of the H design on proven turbine technology, starting with the high-pressure compressors. Another advantage GE intends to stress in marketing its H turbines, along with fuel economy and environmental performance, is their greater power density.

Combined Cycle Off-Design Performance Estimation: A Second-Law Perspective

2011 ◽  
Author(s):  
S. Can Gu¨len ◽  
Joseph John
Keyword(s):  
Power Plant ◽  
Electricity Market ◽  
Combined Cycle ◽  
Performance Estimation ◽  
Second Law ◽  
Combined Cycle Power Plant ◽  
Design Performance ◽  
Cycle System ◽  
Wide Range ◽  
Exact Design

A combined cycle power plant (or any power plant, for that matter) does very rarely — if ever — run at the exact design point ambient and loading conditions. Depending on the demand for electricity, market conditions and other considerations of interest to the owner of the plant and the existing ambient conditions, a CC plant will run under boundary conditions that are significantly different from those for which individual components are designed. Accurate calculation of the “off-design” performance of the overall combined cycle system and its key subsystems requires highly detailed and complicated computer models. Such models are crucial to high-fidelity simulation of myriad off-design performance scenarios for control system development to ensure safe and reliable operability in the field. A viable option in lieu of sophisticated system simulation is making use of the normalized curves that are generated from rigorous model runs and applying the factors read from such curves to a known design performance to calculate the “off-design” performance. This is the common method adopted in the fulfillment of commercial transactions. These curves, however, are highly system-specific and their broad applicability to a wide variety of configurations is limited. Utilizing the key principles of the second law of thermodynamics, this paper describes a simple, physics-based calculation method to estimate the off-design performance of a combined cycle power plant. The method is shown to be quite robust within a wide range of operating regimes for a generic combined cycle system. As such, a second law based approach to off-design performance estimation is a highly viable tool for plant engineers and operators in cases where calculation speed with a small sacrifice in fidelity is of prime importance.

Combined Cycle and Waste Heat Recovery Power Systems Based on a Novel Thermodynamic Energy Cycle Utilizing Low-Temperature Heat for Power Generation

1983 ◽  
Author(s):  
Alexander I. Kalina
Keyword(s):  
Power Systems ◽  
Waste Heat ◽  
Rankine Cycle ◽  
Combined Cycle ◽  
General Motors ◽  
Energy Prices ◽  
Cycle System ◽  
Energy Cycle ◽  
The Cost ◽  
Thermodynamic Energy

A new thermodynamic energy cycle has been developed, using a multicomponent working agent. Condensation is supplemented with absorption, following expansion in the turbine. Several combined power systems based on this cycle have been designed and cost-estimated. Efficiencies of these new systems are 1.35 to 1.5 times higher than the best Rankine Cycle system, at the same border conditions. Investment cost per unit of power output is about two-thirds of the cost of a comparable Rankine Cycle system. Results make cogeneration economically attractive at current energy prices. The first experimental installation is planned by Fayette Manufacturing Company and Detroit Diesel Allison Division of General Motors.

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