Advanced Solar Dynamic Space Power Systems, Part I: Efficiency and Surface Optimization

1995 ◽  
Vol 117 (4) ◽  
pp. 265-273 ◽  
Author(s):  
A. Agazzani ◽  
A. Massardo
Keyword(s):  
Power Generation ◽  
Power Systems ◽  
Space Station ◽  
Optimization Procedure ◽  
Combined Cycle ◽  
Maximum Efficiency ◽  
Brayton Cycle ◽  
Surface Conditions ◽  
Cycle Systems ◽  
Space Power Systems

The aim of this work is the proposal and the analysis of advanced solar dynamic space power systems for electrical space power generation. The detailed thermodynamic analysis of SDCC (Solar Dynamic Combined Cycle) and SDBC (Solar Dynamic Bynary Cycle) systems is carried out. The analysis is completed with an optimization procedure that allows the maximum efficiency and minimum surface conditions to be obtained. The calculation is carried out for the orbital conditions of the NASA-Freedom Space Station. The results are presented, compared with the data already published for a reference CBC (Closed Brayton Cycle) plant (Massardo, 1993b), and discussed in depth.

scholarly journals Benefits of Solar/Fossil Hybrid Gas Turbine Systems

1979 ◽  
Author(s):  
H. S. Bloomfield
Keyword(s):  
Power Systems ◽  
Gas Turbine ◽  
Combined Cycle ◽  
Brayton Cycle ◽  
Fuel Saving ◽  
Operational Mode ◽  
Fuel Savings ◽  
Cycle Systems ◽  
Potential Benefits ◽  
Near Term

The potential benefits of solar/fossil hybrid gas turbine power systems were assessed. Both retrofit and new systems were considered from the aspects of: cost of electricity, fuel conservation, operational mode, technology requirements, and fuels flexibility. Hybrid retrofit (repowering) of existing combustion (simple Brayton cycle) turbines can provide near-term fuel savings and solar experience, while new and advanced recuperated or combined-cycle systems may be an attractive fuel saving and economically competitive vehicle to transition from today’s gas- and oil-fired powerplants to other more abundant fuels.

High-Efficiency Solar Dynamic Space Power Generation System

1991 ◽  
Vol 113 (3) ◽  
pp. 131-137 ◽  
Author(s):  
Aristide Massardo
Keyword(s):  
Power Generation ◽  
Power Systems ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Combined Cycle ◽  
Working Fluid ◽  
Brayton Cycle ◽  
Generation System ◽  
Dynamic Power ◽  
Power Generation System

Space power technologies have undergone significant advances over the past few years, and great emphasis is being placed on the development of dynamic power systems at this time. A design study has been conducted to evaluate the applicability of a combined cycle concept—closed Brayton cycle and organic Rankine cycle coupling—for solar dynamic space power generation systems. In the concept presented here (solar dynamic combined cycle), the waste heat rejected by the closed Brayton cycle working fluid is utilized to heat the organic working fluid of an organic Rankine cycle system. This allows the solar dynamic combined cycle efficiency to be increased compared to the efficiencies of two subsystems (closed Brayton cycle and organic fluid cycle). Also, for small-size space power systems (up to 50 kW), the efficiency of the solar dynamic combined cycle can be comparable with Stirling engine performance. The closed Brayton cycle and organic Rankine cycle designs are based on a great deal of maturity assessed in much previous work on terrestrial and solar dynamic power systems. This is not yet true for the Stirling cycles. The purpose of this paper is to analyze the performance of the new space power generation system (solar dynamic combined cycle). The significant benefits of the solar dynamic combined cycle concept such as efficiency increase, mass reduction, specific area—collector and radiator—reduction, are presented and discussed for a low earth orbit space station application.

Advanced Solar Dynamic Space Power Systems, Part II: Detailed Design and Specific Parameters Optimization

1995 ◽  
Vol 117 (4) ◽  
pp. 274-281 ◽  
Author(s):  
A. Agazzani ◽  
A. Massardo
Keyword(s):  
Power Systems ◽  
Performance Optimization ◽  
Optimization Procedure ◽  
Specific Area ◽  
Combined Cycle ◽  
Parameters Optimization ◽  
Space Applications ◽  
Detailed Design ◽  
Binary Cycle ◽  
Space Power Systems

The aim of this work is the proposal and the analysis of advanced solar dynamic space power systems for electrical space power generation. In the first part of this work (Agazzani and Massardo, 1995) a performance optimization procedure for a SDCC (Solar Dynamic Combined Cycle) and a SDBC (Solar Dynamic Binary Cycle) was presented. Results have pointed out improvements obtainable in terms of conversion efficiency and specific area (m2/kWe), this last estimated in a simplified way. Nevertheless, before drawing conclusions about the superiority of these advanced systems, it is necessary to verify the constructive possibility of the single components of the systems, estimating weights and surfaces, the most significant parameters in space applications. In this second part the design procedures of some components will be discussed in detail; a complete optimization procedure (thermodynamic analysis and detailed design) will be presented with the purpose of minimizing specific area (m2/kWe) and specific mass (kg/kWe). The results obtained are presented, discussed, and compared with the data of a reference optimized CBC system (Massardo, 1993b).

scholarly journals Turbomachinery Characteristics of Brayton-Cycle Space-Power-Generation Systems

1964 ◽  
Author(s):  
Milton G. Kofskey ◽  
Arthur J. Glassman
Keyword(s):  
Power Systems ◽  
Analytical Study ◽  
Design Parameters ◽  
Working Fluid ◽  
Brayton Cycle ◽  
Cycle Space ◽  
And Performance ◽  
Power Outputs ◽  
Power Generation Systems ◽  
Space Power Systems

This paper presents the results of an analytical study of turbomachinery requirements and configurations for Brayton-cycle space-power systems. Basic turbomachinery requirements are defined and typical effects of such system design parameters as power, temperature, pressure and working fluid on turbomachinery geometry and performance are explored. Typical turbomachinery configurations are then presented for systems with power outputs of 10, 100 and 1000 kw.

Model Fidelity Requirements for Closed-Brayton-Cycle Space Power Systems

2007 ◽  
Vol 23 (3) ◽  
pp. 637-640 ◽  
Author(s):  
Michael J. Barrett ◽  
Paul K. Johnson
Keyword(s):  
Power Systems ◽  
Brayton Cycle ◽  
Cycle Space ◽  
Model Fidelity ◽  
Space Power Systems

scholarly journals Carbon-Carbon Recuperators in Closed-Brayton-Cycle Space Power Systems.

2008 ◽  
Vol 24 (3) ◽  
pp. 609-613
Author(s):  
Michael J. Barrett ◽  
Paul K. Johnson
Keyword(s):  
Power Systems ◽  
Brayton Cycle ◽  
Cycle Space ◽  
Space Power Systems

Silicon Carbide Solar Receiver for Residential Scale Concentrated Solar Power

2012 ◽  
Author(s):  
Matthew Neber ◽  
Hohyun Lee
Keyword(s):  
Power Generation ◽  
Silicon Carbide ◽  
Power Systems ◽  
Solar Power ◽  
Low Cost ◽  
Combined Cycle ◽  
Hot Water ◽  
Single Family ◽  
Concentrated Solar Power ◽  
Process Heating

The benefits of Concentrated Solar Power (CSP) systems include the ability to use them in combined cycles such as Combined Cooling Heat and Power (CCHP), and direct AC power generation. While this is done with success for utility scale power production, there are currently no systems offering this for residential scale, distributable power systems. In prior research, a low-cost high-temperature cavity receiver for a wide variety of applications was developed by employing silicon carbide [1]. The proposed design takes advantage of exclusive manufacturing techniques for ceramics such as machining in the green state and sintering multiple simple parts together to form a single complex part. Serious consideration has gone into designing a receiver that will be universally compatible with a number of applications. Some applications include using the receiver in a combined cycle power generation, as a chemical reactor, or for combined heat and power. The focus of this research is to analyze system metrics for a CCHP dish-Brayton system that is feasible for residential scale use. Preliminary research shows that an adequately sized system could provide a single family home with 2.5 kW of electricity and another 7 kW of process heating that could be used for absorption chilling or hot water and space heating. Cost analysis on the system will be performed to quantify its economic viability. Results on the analysis for multiple process heating applications will be presented along with the proposed design.

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