Electric Energy Saving in Building HVAC and Domestic...
Transcript of Electric Energy Saving in Building HVAC and Domestic...
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Leila Chennaoui, Giovanni Cerri*, S. Benyamin Alavi
DEPARTEMENT OF ENGINEERING
Electric Energy Saving in Building HVAC and Domestic Refrigerators by Vapor Compression Power Regeneration Cycles
[email protected] 13-15, 2017
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IRVINE, CALIFORNIA, USA
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COLD
LOW TEMPERATURES
ARTIFICIAL COOLING
IMPROVES THE QUALITY OF THE LIFE OF HUMAN
BEINGS
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HOUSES, SHOPS, RESTORANTS & MORE ...
URBAN BUILDINGS
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INDUSTRIAL BUILDINGS
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ELECTRIC WORK CONSUMED FOR COOLING POWER PRODUCTION
• WORLDWIDE 17%• INDUSTRIALIZED COUNTRIES 22%• DEVELOPING HOT COUNTRIES UP TO 40%• WORLDWIDE CO2 LINKED EMISSIONS 4.5%• + MILLIONS OF GASOLINE AND DIESEL FUEL LITRES: CARS, TRUCKS, SHIPS, etc.
WORLD 3061CHINA 1029ITALY 75USA 949JAPAN 231
COOLING POWER PRODUCTION [GkWh]
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SIMPLE CYCLE
CP=m*efscPel=m*WMCscCOP=efcs/WMCsc
HERMETIC OR SEMIHERMETIC COMPRESSORS
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SIMPLE CYCLE
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THERMAL REGENERATION CYCLE
HEEFF= (T1-T8)/(T5-T8)
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THERMAL REGENERATION CYCLE
Thermal Regeneration VCRC Performance for a given compressor
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POWER REGENERATION CYCLES
Bottom Power Regeneration CyclesTop Power Regeneration Cycle
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Condenser TQ chart
Evaporator TQ chart
Bleed Vapor Generator TQ chart
VBGEFF= (T5j-T6j)/(T5j-Tbj)
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Compressor and Expander Processes
SELECTION AND SIZING OF THE VPA
Compressor and Expander through Flow Section
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OPTIMIZATION RESULTSTop Power Regeneration Cycle Bottom Power Regeneration Cycles
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Compressor Expander
Application of the 1D MLM leads to provide
the profiles of compressor and
expander impellers
SELECTION AND SIZING OF THE VPA
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THE VPA SET UP AND TEST BENCH
Volute, Stator Vanes and Variable Nozzle Geometry Test Bench
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POWER SAVING
2𝐵𝐵𝐵𝐵𝐵 𝑇𝑇𝑘𝑘 = +40 °𝐶𝐶 𝑇𝑇𝑒𝑒𝑒𝑒 = −40 °𝐶𝐶 𝑅𝑅𝑅𝑅𝑅𝑅𝑅
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1. THE BOTTOM POWER REGENERATED VAPOR COMPRESSION REFRIGERATION PLANTS HAVE BEEN PROVEN
TO BE THE BEST PRESENT ENERGY SAVING SOLUTIONS;
2. THE IMPLEMENTATION OF CAR ENGINE TURBOCHARGER TECHNOLOGY IS CHEAP, RELIABLE AND EFFICIENT;
3. TESTS HAVE SHOWN THAT THE BOTTOM POWER REGENERATED REFRIGERATION PLANTS EQUIPPED WITH
TURBOMACHINERY BASED VAPOR PRESSURE AMPLIFIERS IS A MATURE TECHNOLOGY TO BE APPLIED;
4. IN PUBLIC ADMINISTRATION BUILDINGS, EQUIPPED WITH AIR CONDITIONING PLANTS, ABOUT 9-12%
AVERAGE ENERGY SAVING IS EXPECTED.
5. IN AIR CONDITIONED BUILDINGS THAT INCLUDE COMMERCIAL & INDUSTRIAL ACTIVITIES, AN AVERAGE
POWER SAVING OF ABOUT 20% CAN BE ACHIEVED.
CONCLUSIONS
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