scholarly journals Analysis of R134a Organic Regenerative Cycle

2020 ◽  
Vol 08 (05) ◽  
pp. 32-45
Author(s):  
André Felippe Vieira da Cunha ◽  
Sandino Lamarca Santos Souza
Keyword(s):  
Regenerative Cycle

Thermodynamic Evaluation of Gas Turbine Cogeneration Cycles: Part II—Complex Cycle Analysis

1987 ◽  
Vol 109 (1) ◽  
pp. 8-15 ◽  
Author(s):  
I. G. Rice
Keyword(s):  
Gas Turbine ◽  
Heat Balance ◽  
Steam Injection ◽  
Balance Method ◽  
Visual Perspective ◽  
Thermodynamic Evaluation ◽  
The Future ◽  
Steam Cooling ◽  
The Heat Balance ◽  
Regenerative Cycle

Complex open gas turbine cycles are analyzed by applying the heat balance method presented in Part I of this paper. Reheating, intercooling, regeneration, steam injection, and steam cooling are evaluated graphically to give a visual perspective of what takes place in terms of the overall heat balance when such complexities are introduced to the cycle. An example of a viable, new, intercooled regenerative cycle is given. A second example of a prototype reheat gas turbine is also included. The overall approach using the heat balance method can be applied to various cogeneration configurations when considering the more complex cycles of the future.

scholarly journals Regenerated Marine Gas Turbines: Part II — Regenerator Technology and Heat Exchanger Sizing

1982 ◽  
Author(s):  
J. W. Watts ◽  
T. L. Bowen
Keyword(s):  
Heat Exchanger ◽  
Pressure Drop ◽  
Performance Improvement ◽  
Gas Turbines ◽  
Performance Parameters ◽  
Next Generation ◽  
Plate Spacing ◽  
Naval Ship ◽  
And Performance ◽  
Regenerative Cycle

Analytical studies are currently being conducted by the David Taylor Naval Ship R&D Center to assess the suitability of regenerative-cycle and intercooled, regenerative-cycle gas turbines for naval applications. This paper is the second part of a two-part paper which discusses results of initial investigations to identify attractive engine concepts based on existing turbomachinery and to consider the regenerator technology required to develop these engine concepts. Part I of the paper analyzed existing and next generation engines for performance improvement. Part II includes: definitions of performance parameters such as effectiveness and pressure drop, a discussion of regenerator types, and comments on regenerator materials, life, maintenance, and fouling. Tradeoffs between size, weight, and performance of plate-fin recuperators are examined using two of the hypothetical engines from Part I as examples. Results are compared for several different recuperator matrices to illustrate the effects of air-side and gas-side fin density and plate spacing on size, weight, and performance.

scholarly journals A New 4500-HP Gas Turbine for Pipeline Industrial Service

1970 ◽  
Author(s):  
R. R. Oliver ◽  
F. Fraschetti
Keyword(s):  
Gas Turbine ◽  
Mechanical Design ◽  
Maximum Efficiency ◽  
Heavy Duty ◽  
Cooperative Effort ◽  
Package Design ◽  
Wide Range ◽  
Industrial Service ◽  
Design Options ◽  
Regenerative Cycle

This paper describes the performance and mechanical design of a 4500-hp, two shaft heavy duty simple or regenerative cycle gas turbine. This machine resulted from an international cooperative effort of the joint authors’ respective companies. Initially planned for gas pipelines and process applications, a line of load compressors has been integrated into the single package design. Options include indoor or outdoor models and geared or direct mechanical output for applications not served by the integral compressor models. A variable area load turbine nozzle assures maximum efficiency over a wide range of load, speed, and amibient conditions.

Regenerative processes in the infinite mean cycle case

2001 ◽  
Vol 38 (01) ◽  
pp. 165-179 ◽  
Author(s):  
K. V. Mitov ◽  
N. M. Yanev
Keyword(s):  
Renewal Process ◽  
Limit Theorems ◽  
Domain Of Attraction ◽  
Regenerative Process ◽  
Distribution Functions ◽  
Regenerative Processes ◽  
Alternating Renewal Process ◽  
Different Types ◽  
Mean Cycle ◽  
Regenerative Cycle

A class of non-negative alternating regenerative processes is considered, where the process stays at zero random time (waiting period), then it jumps to a random positive level and hits zero after some random period (life period), depending on the evolution of the process. It is assumed that the waiting time and the lifetime belong to the domain of attraction of stable laws with parameters in the interval (½,1]. An integral representation for the distribution functions of the regenerative process is obtained, using the spent time distributions of the corresponding alternating renewal process. Given the asymptotic behaviour of the process in the regenerative cycle, different types of limiting distributions are proved, applying some new results for the corresponding renewal process and two limit theorems for the convergence in distribution.

A New Performance Criterion for Steam-Turbine Regenerative Cycles

1959 ◽  
Vol 81 (4) ◽  
pp. 389-399 ◽  
Author(s):  
J. Kenneth Salisbury
Keyword(s):  
Thermal Cycle ◽  
Performance Monitoring ◽  
Weighted Average ◽  
Heat Rate ◽  
Performance Criterion ◽  
Single Variable ◽  
Simple Criterion ◽  
And Performance ◽  
Extraction Enthalpy ◽  
Regenerative Cycle

This paper presents an explanation and discussion of a heretofore unexploited criterion of the performance of the regenerative cycle. It is demonstrated that this simple criterion, the flow-weighted average extraction enthalpy, embodies in a single variable all of the effects of extracting steam for feedwater heating, and permits quick and direct estimation of the effect of any cycle change on heat rate. Thus the new variable is useful in both design and performance monitoring of the thermal cycle, as well as in estimating the improvement that is realized by regeneration.

The Design and Development of the Orenda OT-4 Gas Turbine

1966 ◽  
Vol 88 (2) ◽  
pp. 117-126 ◽  
Author(s):  
D. Quan
Keyword(s):  
Diesel Engine ◽  
Gas Turbine ◽  
Development Program ◽  
Lessons Learned ◽  
Emergency Unit ◽  
Design And Development ◽  
Regenerative Cycle

The Orenda OT-4 is a gas turbine which uses a simple regenerative cycle and is being developed as a multipurpose, continuous or emergency unit which will be competitive with the diesel engine and will retain the inherent advantages of the gas turbine. This development program is now in its fourth year. The design and development philosophies used in this engine are discussed briefly. The problems still facing the engine are indicated. Some of the experience and lessons learned from this program are discussed.

Sign in / Sign up

Export Citation Format

Share Document