PDF Publication Title:
Text from PDF Page: 004
- !IIll s-~•• TP-27,27 Thermal Condu~ii~ftyc (Wm K ) 1. 0 0.51 0.36 0.34 0.25 0.21 ~~ Name/Formula Tempera- t u r e (OC) E n t h a l p y (kJ/kg) Melting Tempera- t u r e (oC) 260 198 126 219 Specific H e a t a D e n s i t { (kJ/kg K) (kg/m- ) 2.84 1333 1218 2.75 1193 1118 2.76 1046 984 TME + graphite (10%) (weight basis) Solid/Liquid PCHs Calcium chloride cac12 6H2o Paraffin wax mixed commercial Conventional Materials Concrete Gypsum board 81 198 * 27 2.10 47 2.4 (a) Specific (CHtOH)tCH2CH3; ava lab e. 2 . MECHANISMS heat (c) of the low temperature temperature Table 1. Typical Properties of Thermal Storage Materials Transition Solid State PCMs Pentaerythritol 188 323 PE (CH 0H) c 24 Trimethylolethane 81 193 TME (CH 0H) CCH 233 Neopentyl glycol 43 NPG (CH 0H) C(CH ) 2232 T ris (hydroxymethyl) 2 126 acetic acid (CH 20H) 3CCOOH Composite SS PCMs NPG (60%) + TME (40%) 26 (molar basis) NPG (67%) + TMPb (33%) 24 (molar basis 131 204 76 61 174 191 128 polymorph; (b) TMP = Trimethylolpropane, polymorph and high temperature polymorph; * = data not high The SS PCMs listed in Table 1 derive their unusual behavior from their tetra- hedral molecular shape and the hydrogen resonant bonding that occurs between neighboring molecules in the crystalline solid. At low temperatures, the intermolecular hydrogen bonding restricts molecular movement. At the solid- state transformation temperature, the intermolecular hydrogen bonds break, allowing the molecules to rotate and vibrate more freely in their lattice sites (1). It is the energy absorbed by this increased molecular motion that imparts the heat storage capacity to these materials. Hhen the material is cooled, the reverse transformation occurs at the same temperature. The prevalence of intermolecular hydrogen bonds largely controls the amount of energy absorbed at the solid-state transition. By selecting the molecular structure or by mixing molecules of different structure in the same crystal- 2 140 2.64 1071 0.23 ** 1257 0.64 1196 0.43 1802 1.09 1562 0.54 770 0.12 0.19 102 ir *** 1. 82 1.085 755 0.11 0.92 2450PDF Image | New Phase-Change Thermal Energy Storage Materials for Buildings
PDF Search Title:
New Phase-Change Thermal Energy Storage Materials for BuildingsOriginal File Name Searched:
2727.pdfDIY 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 (Standard Web Page)