Second Law Analysis of a Refrigeration System for a Novel Semi-Closed Gas Turbine-Absorption Combined Cycle

2010 ◽  
Author(s):  
ChoonJae Ryu ◽  
William E. Lear ◽  
S. A. Sherif
Keyword(s):  
Gas Turbine ◽  
Power Efficiency ◽  
Energy System ◽  
Combined Cycle ◽  
Lapse Rate ◽  
Refrigeration System ◽  
Distributed Energy ◽  
Distributed Energy System ◽  
Load Leveling ◽  
Ice Production

The Power, Water Extraction, and Refrigeration (PoWER) engine has been investigated for several years as a distributed energy system, among other applications, for civilian or military use. Previous literature describing its modeling and experimental demonstration have indicated several benefits, especially when the underlying semi-closed cycle gas turbine is combined with a vapor absorption refrigeration system, the PoWER system described herein. The benefits include increased efficiency, high part-power efficiency, small lapse rate, compactness, less emission, air, and exhaust flows (which decrease filtration and duct size) and condensation of fresh water. The present paper describes the preliminary design and modeling of a modified version of this system as applied to distributed energy, especially useful in regions which are prone to major grid interruptions due to hurricanes, under - capacity, or terrorism. In such cases, the distributed energy system should support most or all services within an isolated service island, including ice production, so that the influence of the power outage is limited in scope. This paper describes the rather straightforward system modifications necessary for ice production. The primary focus of the paper is the use of this ice-making capacity to achieve significant load-leveling during the summer utility peak, hence reducing the electrical capacity requirements for the grid as well as load-leveling strategies.

System Design of a Novel Combined Cooling, Heat, Power, and Water Microturbine Combined Cycle

2008 ◽  
Author(s):  
William E. Lear ◽  
ChoonJae Ryu ◽  
John F. Crittenden ◽  
Aditya Srinivasan ◽  
William Ellis ◽  
...  
Keyword(s):  
Power Efficiency ◽  
Energy System ◽  
Combined Cycle ◽  
Current Paper ◽  
Lapse Rate ◽  
Distributed Energy ◽  
Distributed Energy System ◽  
Load Leveling ◽  
Primary Focus ◽  
Ice Production

The Power, Water Extraction, and Refrigeration (PoWER) engine has been investigated for several years as a distributed energy system, among other applications, for civilian or military use. Previous literature describing its modeling and experimental demonstration have indicated several benefits, especially when the underlying semi-closed cycle gas turbine is combined with a vapor absorption refrigeration system, the PoWER system described herein. The benefits include increased efficiency, high part-power efficiency, small lapse rate, compactness, less emissions, less air and exhaust flows (which decrease filtration and duct size) and condensation of fresh water. The current paper describes the preliminary design and modeling of a modified version of this system as applied to distributed energy, especially useful in regions which are prone to major grid interruptions due to hurricanes, under-capacity, or terrorism. In such cases, the distributed energy system should support most or all services within an isolated service island, including ice production, so that the influence of the power outage is limited in scope. The current paper describes the rather straightforward system modifications necessary for ice production. The primary focus of the paper is the use of this ice-making capacity to achieve significant load-leveling during the summer utility peak, hence reducing the electrical capacity requirements for the grid as well as load-leveling strategies.

A Flexible Fuel Semi-Closed Combined Cycle for Power, Refrigeration and Water

2007 ◽  
Author(s):  
W. E. Lear ◽  
J. F. Crittenden ◽  
J. R. Khan ◽  
S. A. Sherif
Keyword(s):  
Power Efficiency ◽  
Energy System ◽  
Combined Cycle ◽  
Lapse Rate ◽  
Distributed Energy ◽  
Power Outage ◽  
Turbine Engine ◽  
Distributed Energy System ◽  
Absorption Refrigeration System ◽  
Vapor Absorption Refrigeration

The High Pressure Regenerative Turbine Engine (HPRTE) has been investigated since the mid 1990s as the distributed energy system, among other applications, for civilian or military use. Previous literature describing its modeling and experimental demonstration have indicated several benefits, especially when combined with a Vapor Absorption Refrigeration System (VARS) in a novel way. The benefits includes increased efficiency, high part power efficiency, small lapse rate, compactness, low emissions, low air exhaust flows (which decrease filtration and ducting) and condensation of fresh water. The current paper describes the preliminary design and modeling of a modified version of this system applied to distributed energy, especially in regions which are prone to major grid interruptions due to hurricanes, under-capacity, or terrorism. In such cases, the distributed energy system should support most or all services within an isolated “island” so that the influence of the power outage is limited in scope. In addition, the paper will describe the possible production of ice, under emergency conditions, using the fresh condensate plus other water sources.

Dynamic Modeling of a Novel Cooling, Heat, Power, and Water Microturbine Combined Cycle

2008 ◽  
Author(s):  
ChoonJae Ryu ◽  
Aditya Srinivasan ◽  
David R. Tiffany ◽  
John F. Crittenden ◽  
William E. Lear ◽  
...  
Keyword(s):  
Dynamic Modeling ◽  
Power Efficiency ◽  
Combined Cycle ◽  
Lapse Rate ◽  
Power Outage ◽  
Load Leveling ◽  
Primary Focus ◽  
Absorption Refrigeration System ◽  
Ice Production ◽  
Vapor Absorption Refrigeration

The Power, Water Extraction, and Refrigeration (PoWER) engine has been investigated for several years as a distributed energy (DE) system among other applications for civilian or military use. Previous literature describing its modeling and experimental demonstration have indicated several benefits, especially when the underlying semi-closed cycle gas turbine is combined with a vapor absorption refrigeration system, the PoWER system described herein. The benefits include increased efficiency, high part-power efficiency, small lapse rate, compactness, low emissions, lower air and exhaust flows (which decrease filtration and duct size) and condensation of fresh water. The present paper describes the preliminary design and its modeling of a modified version of this system as applied to DE system, especially useful in regions which are prone to major grid interruptions due to hurricanes, under-capacity, or terrorism. In such cases, the DE system should support most or all services within an isolated service island, including ice production, so that the influence of the power outage is contained in magnitude and scope. The paper describes the rather straightforward system modifications necessary for ice production. However, the primary focus of the paper is on dynamic modeling of the ice making capacity to achieve significant load-leveling during the summer utility peak, hence reducing the electrical capacity requirements for the grid.

Dynamic Modeling of a Novel Cooling, Heat, Power, and Water Microturbine Combined Cycle

2010 ◽  
Vol 132 (2) ◽  
Author(s):  
ChoonJae Ryu ◽  
David R. Tiffany ◽  
John F. Crittenden ◽  
William E. Lear ◽  
S. A. Sherif
Keyword(s):  
Dynamic Modeling ◽  
Power Efficiency ◽  
Combined Cycle ◽  
Lapse Rate ◽  
Power Outage ◽  
Load Leveling ◽  
Primary Focus ◽  
Absorption Refrigeration System ◽  
Ice Production ◽  
Vapor Absorption Refrigeration

The power, water extraction, and refrigeration (PoWER) engine has been investigated for several years as a distributed energy (DE) system among other applications for civilian or military use. Previous literature describing its modeling and experimental demonstration have indicated several benefits, especially when the underlying semiclosed cycle gas turbine is combined with a vapor absorption refrigeration system, the PoWER system described herein. The benefits include increased efficiency, high part-power efficiency, small lapse rate, compactness, low emissions, lower air and exhaust flows (which decrease filtration and duct size), and condensation of fresh water. The present paper describes the preliminary design and its modeling of a modified version of this system as applied to DE, especially useful in regions, which are prone to major grid interruptions due to hurricanes, undercapacity, or terrorism. In such cases, the DE system should support most or all services within an isolated service island, including ice production, so that the influence of the power outage is contained in magnitude and scope. The paper describes the rather straightforward system modifications necessary for ice production. However, the primary focus of the paper is on dynamic modeling of the ice making capacity to achieve significant load-leveling via thermal energy storage during the summer utility peak, hence reducing the electrical capacity requirements for the grid.

Aeroderivative Combined Heat and Power Fundementals and Applications

2012 ◽  
Author(s):  
James DiCampli
Keyword(s):  
Natural Gas ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Energy System ◽  
Combined Heat And Power ◽  
Combined Cycle ◽  
Draft Guidance ◽  
Distributed Energy ◽  
Improve Energy Efficiency ◽  
Exhaust Heat

Combined heat and power (CHP), is an application that utilizes the exhaust heat generated from a gas turbine and converts it into a useful energy source for heating & cooling, or additional electric generation in combined cycle configurations. Compared to simple-cycle plants with no heat recovery, CHP plants emit fewer greenhouse gasses and other emissions, while generating significantly more useful energy per unit of fuel consumed. Clean plants are easier to permit, build and operate. Because of these advantages, Aeroderivative gas turbines will be a major part of global CHP growth, particularly in China. In order to improve energy efficiency and reduce CO2 emissions, China is working to build ∼1000 new plants of Natural Gas Distributed Energy System (NG-DES) in the next five years. These plants will replace conventional coal-fired plants with combined cooling, heating and power (CCHP) systems. China power segments require an extensive steam supply for cooling, heating and industrial process steam demands, as well as higher peak loads due to high population densities and manufacturing growth rates. GE Energy Aero recently entered the CCHP segment in China, and supported the promotion of codes and standards for NG-DES policy, and is developing optimized CCHP gas turbine packages to meet requirements. This paper reviews those policies and requirements, and presents technical case studies on CCHP applications. Appendix B highlights China’s draft “Guidance Opinions on Developing Natural-Gas Distributed Energy.”

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