scholarly journals Small-Particle Solar Receiver for High-Temperature Brayton Power Cycles (Fact Sheet)

2012 ◽  
Author(s):  
Keyword(s):  
High Temperature ◽  
Small Particle ◽  
Power Cycles ◽  
Fact Sheet ◽  
Solar Receiver

Theoretical analysis of a high-temperature small-particle solar receiver

1991 ◽  
Vol 24 (1-4) ◽  
pp. 210-221 ◽  
Author(s):  
Fletcher Miller ◽  
Roland Koenigsdorff
Keyword(s):  
High Temperature ◽  
Theoretical Analysis ◽  
Small Particle ◽  
Solar Receiver

scholarly journals High-Temperature Receiver Designs for Supercritical CO2 Closed-Loop Brayton Cycles

2014 ◽  
Author(s):  
C. K. Ho ◽  
T. Conboy ◽  
J. Ortega ◽  
S. Afrin ◽  
A. Gray ◽  
...  
Keyword(s):  
High Temperature ◽  
Supercritical Co2 ◽  
Closed Loop ◽  
High Efficiency ◽  
Power Cycles ◽  
Advantages And Disadvantages ◽  
Solar Powered ◽  
Solar Receiver ◽  
Alternative Designs ◽  
Indirect Heating

High-temperature receiver designs for solar powered supercritical CO2 Brayton cycles that can produce ∼1 MW of electricity are being investigated. Advantages of a supercritical CO2 closed-loop Brayton cycle with recuperation include high efficiency (∼50%) and a small footprint relative to equivalent systems employing steam Rankine power cycles. Heating for the supercritical CO2 system occurs in a high-temperature solar receiver that can produce temperatures of at least 700 °C. Depending on whether the CO2 is heated directly or indirectly, the receiver may need to withstand pressures up to 20 MPa (200 bar). This paper reviews several high-temperature receiver designs that have been investigated as part of the SERIIUS program. Designs for direct heating of CO2 include volumetric receivers and tubular receivers, while designs for indirect heating include volumetric air receivers, molten-salt and liquid-metal tubular receivers, and falling particle receivers. Indirect receiver designs also allow storage of thermal energy for dispatchable electricity generation. Advantages and disadvantages of alternative designs are presented. Current results show that the most viable options include tubular receiver designs for direct and indirect heating of CO2 and falling particle receiver designs for indirect heating and storage.

scholarly journals Fluidized-bed Technology Enabling the Integration of High Temperature Solar Receiver CSP Systems with Steam and Advanced Power Cycles

2015 ◽  
Vol 69 ◽  
pp. 1404-1411 ◽  
Author(s):  
B. Sakadjian ◽  
S. Hu ◽  
M. Maryamchik ◽  
T. Flynn ◽  
K. Santelmann ◽  
...  
Keyword(s):  
High Temperature ◽  
Fluidized Bed ◽  
Power Cycles ◽  
Solar Receiver

Cyclic Methylsiloxanes as Working Fluids for Space Power Cycles

1993 ◽  
Vol 115 (3) ◽  
pp. 130-137 ◽  
Author(s):  
G. Angelino ◽  
C. Invernizzi
Keyword(s):  
High Temperature ◽  
Full Potential ◽  
Working Fluids ◽  
Power Cycles ◽  
Thermodynamic Performance ◽  
High Level ◽  
Organic Fluids ◽  
Large Wheel ◽  
Turbine Exhaust ◽  
Fast Rotating

The potential merits of cyclic polymethylsiloxanes, particularly those conventionally denominated D4 and D5, as working fluids for space power cycles are discussed. The attractive technical characteristics of these substances which are fully nontoxic, moderately flammable, and stable at high temperature are presented. Some experimental results on vapor pressure and on thermal stability are reported. A maximum operating temperature of about 400°C appears achievable. A comprehensive thermodynamic analysis comparing siloxanes with other classes of high temperature fluids is performed. The peculiar characters of siloxane cycles are found to be: a good overall efficiency achieved through a massive regeneration, a moderate expansion work, and an abundant volume flow at turbine exhaust. A number of two-stage turbines for two power levels (i.e., 30 and 5 kW) were designed using an appropriate optimization program. The resulting main features of such expanders were a satisfactory efficiency, a low rotating and peripheral speed, and a comparatively large wheel diameter. These characteristics seem of particular interest for low capacity systems where, with other fluids, turbines tend to be impractically small and fast rotating and where a high level of regeneration becomes more acceptable. In considering for the sake of comparison the thermodynamic performance of many classes of organic fluids, it becomes apparent that the full potential of organic power cycles in view of the variety of future needs has not yet been thoroughly investigated.

Computation of Thermodynamic Properties of Carbon Dioxide in the Range 0–750 Deg C

1970 ◽  
Vol 92 (3) ◽  
pp. 301-309 ◽  
Author(s):  
G. Angelino ◽  
E. Macchi
Keyword(s):  
Carbon Dioxide ◽  
Thermal Properties ◽  
High Temperature ◽  
Thermodynamic Properties ◽  
Thermodynamic Functions ◽  
Critical Region ◽  
Density Measurement ◽  
Working Fluid ◽  
Power Cycles ◽  
Wide Range

The computation of power cycles employing carbon dioxide as working fluid and extending down to the critical region requires the knowledge of the thermodynamic properties of CO2 within a wide range of pressures and temperatures. Available data are recognized to be insufficient or insufficiently accurate chiefly in the vicinity of the critical dome. Newly published density and specific heat measurements are employed to compute thermodynamic functions at temperatures between 0 and 50 deg C, where the need of better data is more urgent. Methods for the computation of thermal properties from density measurement in the low and in the high temperature range are presented and discussed. Results are reported of the computation of entropy and enthalpy of CO2 in the range 150–750 deg C and 40–600 atm. The probable precision of the tables is inferred from an error analysis based on the generation, by means of a computer program of a set of pseudoexperimental points which, treated as actual measurements, yield useful information about the accuracy of the calculation procedure.

On-Sun Testing of a High Temperature Solar Receiver's Flux Distribution

2021 ◽  
pp. 1-24
Author(s):  
Samia Afrin ◽  
Nazmul Hossain ◽  
Zhiwen Ma ◽  
V M Krushnarao Kotteda ◽  
Antara Badhan ◽  
...  
Keyword(s):  
Renewable Energy ◽  
High Temperature ◽  
Flux Distribution ◽  
Receiver Design ◽  
The Novel ◽  
Ansys Fluent ◽  
Power Cycles ◽  
Cost Of Energy ◽  
Hexagonal Shape ◽  
Testing Facility

Abstract Concentrated solar power (CSP) is a promising technology in transitioning to renewable energy because of its abundance in nature and thermal energy storage capability. Among the four types of available CSP technology, including parabolic trough, linear Fresnel, power tower, and parabolic dishes, a power tower using a central receiver has more potential to generate high-temperature heat in a scale supporting power cycles efficiency and achieve low levelized cost of energy (LCOE). Other than the conventional type of receiver design, the high-absorptive receiver concept developed and presented in this paper is novel in its design approach. The novel receiver design originated from National Renewable Energy Laboratory (NREL) consists of an array of solar flux absorb tubes. The solar absorb tubes require uniform flux distribution and in-depth flux penetration through the three different reflective sections of tubes in a hexagonal shape. To evaluate this unique receiver design and thermal performance, the flux distribution, flux uniformity, and intensity were numerically simulated using ANSYS FLUENT and SolTrace modeling program. On-sun testing has been done at NREL high flux solar testing facility, based on the computational analysis.

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