PDF Publication Title:
Text from PDF Page: 003
exceeds the exhaust output of the gas turbines, duct burners installed in the HRSG are used. Steam from the HRSG is passed through two backpressure turbines (7.5 MWe total). It is then fed into the district heating network at temperatures between 160°C and 246°C (320-475°F) and pressures from 75 to 90 psia (5.2-6.2 bar). Lastly, an old, currently not used 58 MWth coal boiler can be used in case of high heating demand. Figure 2: Schematic of the Cornell University CHP combined cycle power plant and district heating system. The existing power plant has an electrical efficiency of 34.5% and a thermal efficiency of 41.4%. This yields a very high combined energetic efficiency of 75.9%. The current system is capable of covering 90% of the peak heat demand at Cornell, and 70% of its total electricity demand. The heat deficit is covered by peaking boilers and remaining electricity is purchased from the grid. District heat is delivered to the substations in campus buildings as a superheated steam. Approximately 18% of distributed heat is lost from the 46 km (28.5 mi) long piping network (CU Facilities Services, 2013). In substations, heat exchangers transfer the heat to secondary hydronic loops, which supply energy needed for space heating, domestic hot water, and other uses. As district heating steam passes through the heat exchangers, it condenses and is eventually returned to the CHP plant. The building heating systems are designed to operate at 82.2°C (180°F) secondary supply temperature and 72°C (165°F) secondary return temperature during the coldest days in a year. High space heating (secondary) temperatures impose a requirement of a relatively high district heating (primary) distribution temperature. PROPOSED HYBRID EGS-BIOMASS ENERGY SYSTEM AT CORNELL Our objective in this study was to design an efficient heat production and distribution system which uses only geothermal and biomass resources to cover demand of a fraction of the Cornell campus. We proposed retrofitting a section of the existing heat distribution system and converting it from steam to hot water. We isolated an area of the campus, in which district heating piping will require considerable replacements within the next few years. The chosen area of North Campus and the Veterinary (Vet) School has a heat load corresponding to 26% of the whole campus demand, which is presented in Figure 1. This area is also adjacent to the greenhouses, which can provide substantial demand for low-temperature heat. The configuration of the proposed hybrid energy system is presented in Figure 3. The specified EGS reservoir is hydronically separated from the district heating (DH) network utilizing a heat exchanger. Although this solution introduces additional exergy (availability) loss, it prevents scaling and corrosion in the surface infrastructure, allows for easier control of the DH water temperature and flow rate, and facilitates system expansion in the future. To further enhance reliability of the proposed design, we included a backup steam-to-water heat exchanger. It allows the existing CHP plant to cover heat demand of the North Campus and the Vet School during a shutdown or maintenance of the geothermal system. Two possible design scenarios were considered: 1. ‘DH’: Geothermal energy was used only for district heating. Design does not include an Organic Rankine Cycle (ORC) power plant. 2. ‘DH-ORC’: Geothermal energy was used for both district heating and generation of electricity using an Organic Rankine Cycle power plant. The ORC unit operates during low heat demand using the excess heat from EGS. In both cases, a torrefied biomass boiler was used to boost the temperature of DH supply water during peak heat demand. The DH supply water is pumped to building substations providing the heat required for space heating and domestic hot water needs. Approximately 30% of return DH water from building substations is cascaded through greenhouses substations. The return stream is then pumped to the central heat exchanger, which closes the cycle.PDF Image | PROPOSED HYBRID GEOTHERMAL - NATURAL GAS - BIOMASS ENERGY SYSTEM
PDF Search Title:
PROPOSED HYBRID GEOTHERMAL - NATURAL GAS - BIOMASS ENERGY SYSTEMOriginal File Name Searched:
SGP_TR_198_Lukawski.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: 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. May pay by Bitcoin or other Crypto. Products Page... More Info
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |