This work was funded by the U.S. Department of Energy under the SunShot Program Award # DE-EE0005800 Frank Rivera, San Diego State University Professor George Mansfield, San Diego State University 1. Fredrickson, L. “Carbon Particle Generation and Small Particle Heat Exchange Receiver Lab Scale Testing.” Department of Mechanical Engineering, San Diego State University. Juan Barragan, Germán Verduzco, Jonathan Zander Sponsor: Dr. Fletcher Miller PROJECT BACKGROUND DESIGN PROTOTYPE FABRICATION ACKNOWLEDGMENTS REFERENCES ABSTRACT The Carbon Particle Disperser is a lab-scale device that mixes air and carbon nanoparticles that absorb concentrated solar energy and are used to generate electricity in a Brayton Cycle. Figure 1. Concentrated Solar Power Station. DOE Modern solar power stations come in two varieties: Photovoltaic (PV) and Concentrated Solar Power (CSP). CSP stations use mirrors to concentrate solar radiation from a large area into a small beam that is then utilized by a solar receiver as a heat source for a conventional power plant. Figure 1 below shows a CSP station. Although current CSP technology uses the Rankine cycle to generate power, new receivers are in development that make use of the more efficient Brayton Cycle. These receivers utilize carbon nanoparticles to absorb solar energy and transform it into useful thermal energy. The Carbon Particle Disperser (CPD) mixes air and prefabricated carbon nanoparticles, producing a continuous and consistent cloud for the receiver. As seen below in Figure 2, the current design of the CPD is based off a jet mill, which uses compressed air fed through angled inlets to create a vortex effect. For this application, unlike a conventional jet mill that grinds particles, the CPD will only be responsible for mixing prefabricated particles with compressed air. The major design challenge in this project is creating a CPD that disperses a carbon cloud at up to 6 atm, and thus may operate up to 10 atm. A cross-sectional view of the CPD is pictured below in Figure 3. Figure 2. Carbon Particle Disperser Design Figure 3. Carbon Particle Disperser Cross-section View Figure 4 below shows the first manufactured CPD prototype. It features three distinct parts: Top Cover, Bottom Lid, and Vortex Ring, each machined from separate pieces of aluminum at the San Diego State University machine shop by CNC process. FUTURE WORK • Testing the density of the carbon black cloud • Development of a carbon feeding system • Designing an automatic control system Figure 4. Carbon Particle Disperser Prototype

Juan Barragan, Germán Verduzco, Jonathan Zander Sponsor ... · mill that grinds particles, the CPD will only be responsible for mixing prefabricated particles with compressed air

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Page 1: Juan Barragan, Germán Verduzco, Jonathan Zander Sponsor ... · mill that grinds particles, the CPD will only be responsible for mixing prefabricated particles with compressed air

This work was funded by the U.S. Department of Energy under the SunShot Program Award # DE-EE0005800 Frank Rivera, San Diego State University Professor George Mansfield, San Diego State University

1. Fredrickson, L. “Carbon Particle Generation and Small Particle Heat Exchange Receiver Lab Scale Testing.” Department of Mechanical Engineering, San Diego State University.

Juan Barragan, Germán Verduzco, Jonathan Zander Sponsor: Dr. Fletcher Miller

PROJECT BACKGROUND

DESIGN PROTOTYPE FABRICATION

ACKNOWLEDGMENTS

REFERENCES

ABSTRACT

The Carbon Particle Disperser is a lab-scale device that mixes air and carbon nanoparticles that absorb concentrated solar energy and are used to generate electricity in a Brayton Cycle.

Figure 1. Concentrated Solar Power Station. DOE

Modern solar power stations come in two varieties: Photovoltaic (PV) and Concentrated Solar Power (CSP). CSP stations use mirrors to concentrate solar radiation from a large area into a small beam that is then utilized by a solar receiver as a heat source for a conventional power plant. Figure 1 below shows a CSP station.

Although current CSP technology uses the Rankine cycle to generate power, new receivers are in development that make use of the more efficient Brayton Cycle. These receivers utilize carbon nanoparticles to absorb solar energy and transform it into useful thermal energy. The Carbon Particle Disperser (CPD) mixes air and prefabricated carbon nanoparticles, producing a continuous and consistent cloud for the receiver.

As seen below in Figure 2, the current design of the CPD is based off a jet mill, which uses compressed air fed through angled inlets to create a vortex effect. For this application, unlike a conventional jet mill that grinds particles, the CPD will only be responsible for mixing prefabricated particles with compressed air.

The major design challenge in this project is creating a CPD that disperses a carbon cloud at up to 6 atm, and thus may operate up to 10 atm. A cross-sectional view of the CPD is pictured below in Figure 3.

Figure 2. Carbon Particle Disperser Design

Figure 3. Carbon Particle Disperser Cross-section View

Figure 4 below shows the first manufactured CPD prototype. It features three distinct parts: Top Cover, Bottom Lid, and Vortex Ring, each machined from separate pieces of aluminum at the San Diego State University machine shop by CNC process.

FUTURE WORK

• Testing the density of the carbon black cloud • Development of a carbon feeding system • Designing an automatic control system

Figure 4. Carbon Particle Disperser Prototype