報告書番号

EY90002

タイトル（和文）

COMMERCIAL CUSTOMER RESPONSE TO TIME-OF-USE RATES:CASE STUDY OF HOTEL WITH COGENERATION SYSTEMS

タイトル（英文）

COMMERCIAL CUSTOMER RESPONSE TO TIME-OF-USE RATES:CASE STUDY OF HOTEL WITH COGENERATION SYSTEMS

概要 （図表や脚注は「報告書全文」に掲載しております）

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概要 （英文）

THIS RESEARCH PROJECT INVESTIGAETES THE INFLUENCE OF THE UTILITY RATE STRUCTURE ON THE OPTIMAL OPERATION AND CAPACITY DECISION FOR A COGENERATION SYSTEM (CGS). WE HAVE DEVELOPED COMMERCIAL-PROCESS MODELS TO ASSESS CUSTOMER RESPONSE TO TIME-OF-USE (TOU) RATES. FOR COMMERCIAL CUSTOMERS WITH COGENERATING SYSTEMS,A MIXED-INTEGEGERPROGRAMMING MODEL WAS USED TO EXAMINE THE EFFECTS OF TOU RATES ON OPTIMAL OPERATION OF THE SYSTEM AS WELL AS OPTIMAL CAPACITY. A CASE STUDY WAS PERFORMED FOR A GAS ENGINE-DRIVEN CGS FOR A LARGE HOTEL (20,000 M2 TOTAL FLOOR SPACE). THE OPTIMAL CAPACITY FOR THE GAS ENGINE-DRIVEN GENERATOR UNDER THE FLAT RATE IS APPROXIMATELY HALF OF THE PEAK POWER DEMAND. THE EFFECTS OF THE TOU RATE ARE SATURATED AT A RATIO OF 5. ENERGY DEMAND IN WINTER IS MOST SENSITIVE TO THE PEAK/OFF-PEAK ENERGY CHARGE RATIO. IT IS NOT UNTIL THE ENERGY CHARGE RATIO IS BETWEEN 2 AND 5 THAT PURCHASE OF OFF-PEAK POWER IS INCREASED IN SUMMER WHEN THE REDUCED RATE IS APPLIED TO CITY GAS. AS THE ENERGY CHARGE RATIO IS RAISED,CHEAPER OFF-PEAK POWER SUBSTITUTES FOR CITY GAS AND THE SUM OF ELECTRICITY ENERGY CHARGE AND GAS ENERGY CHARGE DECREASES. THE SIMULATION INDICATES THAT PROPERLY-DESIGNED TOU RATES MAY PROVIDE COMMERCIAL CUSTOMERS WITH AN INCENTIVE TO OPERATE A COGENERATION SYSTEM WITH AN APPROPRIATE MIX OF SELF-GENERATION AND COMMERCIAL POWER.

報告者

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