การจัดการพลังงานไฟฟ้าในสถาบันเทคโนโลยีพระจอมเกล้าธนบุรี

Electrical energy management in KMITT

Name: เกษร เพ็ชราช

Organization : มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Name: Kesorn Pechrach

keyword: การประหยัดไฟฟ้าในอาคาร

; การจัดการพลังงานไฟฟ้า

Abstract: This thesis aims to investigate electrical energy use characteristics and energyconservation opportunities in KMITT. The study focuses on 4 buildings, namely,Common Building II, Social Science Building, The School of Energy and MaterialsBuilding, and The Library Building. Data on each building, such as buildingmaterials, layout, single line diagram etc. were collected. Surveys were made onoccupants’ behavior and equipments installation, together with measurements onpower connection, consumptions in lighting system, air conditioning system andother electric equipments. Calculations were subsequently made to estimate theconsumption indices in each building, in lighting system, in air conditioning systemand the electric energy losses.All the building studied have concrete structures and wall panels with glasswindows. For the CB II, Language, Energy and Library buildings, the usable areasapproximate 75.64%, 77.09%, 69.52% and 87.60% of the total floor areasrespectively. For air conditioned areas, the percentage values are approximately25.66%, 42.03%, 35.45% and 86.52% of the total floor areas respectively. Theinstalled capacity of air conditioners are 1,042.82 Btu/m2, 950.00 Btu/m2, 805.0Btu/m*, 777.00 Btu/m*, respectively. The total power use in each buildingapproximates 226.18 kW ., 181.54 kW., 344.82 kW., and 185.60 kW. respectively, ;making consumption per unit area per year 270.04 kWh/m2/yr., 185.84 kWh/m*/yr.,530.20 kWhlmLfyr. and 458.46 kWhlmLlyr. respectively. The operating capacity oftransformer in each building was estimated to be 35.34%, 22.69%, 43.10% and67.00% respectively. The main distribution boards (MDB) are made of galvanizedsteel, with main circuit breaker (MCB) either in molded case or of air circuitbreaker (ACB) type. The peak average current of the MCB were found to be41.30%, 38.72%, 53.30% and 17.13% of the capacities respectively. The lightingsystem consumes approximately 31.17 kW., 42.47 kW., 63.92 kW. and 30.10 kW.in each building which are 17.22%, 29.24%, 40.00% and 20.27% of the totalbuilding power respectively. The amount of power used in air conditioning systemapproximates 98.40 kW., 86.40 kW., 69.36 kW. and 100.40 kW. respectively, whichare approximately 54.38%, 59.48%, 27.48% and 67.62% of the building total powerrespectively. The installed capacity of the air conditioning system was 39.52 kWfm2,26.3 1 kW/m2 , 46.74 kW/m2 and 41.09 kW/m2 for the 4 buildings respectively. Otherelectric equipment were found to be somewhat different in each building due tovariable objectives. The CB II Building, which houses the computer center andmeeting rooms mainly, has electrical power connection for computer work 25.5 kW.,lift 16.2 kW. and other equipment 9.8 kW. which are approximately 14.08%, 8.89%and 5.41%.of the building total power respectively. For the Language Building,electrical power use for sound laboratories equipment amounts to 14.OkW. and 2 setsof lifts consuming 2.2 kW, which are approximately 7.56% and 1.48%. of thebuilding total power respectively. The Energy Building has a variety of laboratoryequipment which consume 61.7 kW, or 24.10% of the total electric power. Nextcomes the consumption in lift which is about 20.6 kW, or 7.63% of the totalelectric power. The electrical equipment used in the library Building is of officetype which constitutes about 18.09 kW, or 12.08% of the total power.The major weakness in consumption is mainly due to occupants’ operatingbehaviour. As a consequence, saving strategy is proposed through the use of timerswitch, sensor switch, photo switch and movement sensor switch for the lightingsystem. In the air-conditioning system installation of thermostat is suggested, whereas \,separate on-off switches are proposed for the ventilating fans. As for the watercooler, 7-day timer switch is proposed, together with sensor switch for computersand printers. Electric equipment losses can be reduced by changing to more efficientsystem, for example in lighting system, more efficient type of reflector may beused to increase illuminaire so that some lighting bulbs can be removed. A changefrom split type to central system for air-conditioning system is also suggested inarea when constant cooling demand is required.These suggested measures are expected to reduce consumption in CB IIBuilding by 73,096.56 kWh/yr., or 120,444.52 Baht/yr. with an investment of293,400.OO Baht. A saving of 61,769.75 kWh/yr., or 101,920.18 Baht/yr. is alsoexpected in the Language Building, with an investment of 263,000 Baht. In theEnergy Building, 25,966.20 kWh/yr., or 42,844.29 Bahtiyr. could possibly be savedwith an investment of 61,400.OO Baht, and lastly, a saving of 481,023.32 kWh/yr.,or 793,688.15 Baht/yr. is also anticipated in the Library Building with an investmentof 2,579,200.00 Baht. For all 4 buildings, a total of energy saving of 641,855.85kWh/yr., or 1,058,896.90 Baht/yr. is estimated, which is about 11.54% of the totalelectricity cost in the campus in 1995.

มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Address: กรุงเทพมหานคร

Email: info.lib@mail.kmutt.ac.th

Name: จุลละพงษ์ จุลละโพธิ

Role: อาจารย์ที่ปรึกษา

Name: วารุณี เตีย

Role: อาจารย์ที่ปรึกษา

Created: 2539

Issued: 2005-04-18

Modified: 2554-02-04

วิทยานิพนธ์/Thesis

ISBN: 9746218689

CallNumber: ET314

tha

DegreeName: วิศวกรรมศาสตรมหาบัณฑิต

Level: ปริญญาโท

Descipline: เทคโนโลยีพลังงาน

Grantor: มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

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