packed-bed thermal energy storage device

PDF Publication Title:

packed-bed thermal energy storage device ( packed-bed-thermal-energy-storage-device )

Previous Page View | Next Page View | Return to Search List

Text from PDF Page: 007

1H hSs W Uc(1)R2 A method of characteristics given by Van Lew[7] is adopted in this study to solve the dimensionless energy balance equations for heat transfer between air and ceramic balls. Equation (11) and (12) can be reduced along the characteristic zz  tt  const and zz  const respectively, and then be led to the solutions as Equation (16) and (17) via integral-discretization and trapezoidal rule: [1tt(11)]f2,2(1 tt)s2,2[1tt(11)]f1,1(tt)s1,1(tt) (16) 2XY2X2XY2XY (1 tt)s2,2 (tt)f 2,2 (1 tt)s2,1 (tt)f 2,1 (17) 2W 2W 2W 2W Equations (16) and (17) can be reposed as a group of algebraic equations for two unknowns of f 2,2 ands2,2 , whilef ands atgridpointf1,1ands2,1areknown. tttt tt tt  ,1 s2,2 (1 ) ( )  (18)    s2,1 2W2W  2W 2W  Since Equation (18) is only for two equations, Cramer’s rule can be applied to obtain the solution, which contributes to the numerical computation with the minimum computing time. Fig.7 shows the solution matrix by using method of characteristics, where M is the spatial grid number, zz is the dimensionless spatial step length, N is the time grid number, and tt is the dimensionless time step length. FIGURE 7 Solution matrix by using method of characteristics In the solution matrix, shown as Fig.7, since the conditions at1,1 ,1,2 , and 2,1 are known for both phases based on the actual experiment conditions, the temperatures of ceramic balls and air at 2,2 will be easily calculated from Equation (18). Then extending the above sample calculation to all points in the  grid of time and space for both phases, the entire matrix of solutions in time and space for both ceramic balls and air can be obtained eventually.   (15) 1tt(1 1),tt [1tt(1 1)]  2 X Y 2Xf2,2  2 X Y f1,1 (tt) 2X s1,1 f2,1 (tt)  Y  ss 080027-6

PDF Image | packed-bed thermal energy storage device

PDF Search Title:

packed-bed thermal energy storage device

Original File Name Searched:

packed-bed-tes.pdf

DIY PDF Search: Google It | Yahoo | Bing

Turbine and System Plans CAD CAM: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. More Info

Waste Heat Power Technology: Organic Rankine Cycle uses waste heat to make electricity, shaft horsepower and cooling. More Info

All Turbine and System Products: Infinity Turbine ORD systems, turbine generator sets, build plans and more to use your waste heat from 30C to 100C. More Info

CO2 Phase Change Demonstrator: CO2 goes supercritical at 30 C. This is a experimental platform which you can use to demonstrate phase change with low heat. Includes integration area for small CO2 turbine, static generator, and more. This can also be used for a GTL Gas to Liquids experimental platform. More Info

Introducing the Infinity Turbine Products Infinity Turbine develops and builds systems for making power from waste heat. It also is working on innovative strategies for storing, making, and deploying energy. More Info

Need Strategy? Use our Consulting and analyst services Infinity Turbine LLC is pleased to announce its consulting and analyst services. We have worked in the renewable energy industry as a researcher, developing sales and markets, along with may inventions and innovations. More Info

Made in USA with Global Energy Millennial Web Engine These pages were made with the Global Energy Web PDF Engine using Filemaker (Claris) software.

Sand Battery Sand and Paraffin for TES Thermo Energy Storage More Info

CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP