การประหยัดพลังงานในโรงงานอุตสาหกรรมประเภทโลหะ

Energy Saving in Metal Industry

Name: อมรรัตน์ แก้วประดับ

Organization : มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Name: Amornrat Kaewpradap

keyword: Energy Saving

; Specific Energy Consumption

; Metal Industry

; Management

Abstract: The objectives of this research are to study the energy saving on the energy analysis, to determine the specific energy consumption (SEC) and to find the method for energy saving of the metal industry. The results show that the energy used for this industry can be separated on the electrical and thermal energy. First, the percentages of electrical energy used for lighting system, air-conditioning system, production process and the others are 3.36, 14.41, 81.74 and 0.48 %, respectively. It showed that maximum electrical energy was used for production process. Second, for heat, from studying and analyzing the energy balance in the furnace, it was found that the thermal efficiency of furnace is 25.46%. Before improvement, the specific energy consumption of this industry is 38.97 GJ/TonAl and after improvement, it was decreased to 31.61 GJ/TonAl. There are many types of products that are produced by this industry such as Bush, Superload, T-55, FranfeKD, LG-7, LG-4, and Finnew. The results showed that the specific energy consumption of Bush, Superload, T-55, FranfeKD, LG-7, LG-4, and Finnew are 27.02, 28.10, 28.92, 29.42, 32.67, 34.97, and 48.50 GJ/TonAl, respectively. In this study, the two important methods for the energy saving in this factory are invented with and without investment. One, the methods with no investment in this industry are to move the air compressor to the suitable location, decrease the pressure of air compressor, adjust the tension of motor belt, control peak demand that can be saved for 2,349 kWh/year (5,684.58 baht/year), 3,780 kWh/year (9,147.60 baht/year), 2,502.58 kWh/year (6,056.23 baht/year), and 95 kW/year (18,644.70 baht/year), respectively. Two, the methods with investment are to use waste heat recovery, low loss ballasts, air-condition maintenances, power factor improvement that can be saved for 923.74 liters of crude oil per year (4,849.62 baht/year), 1,944 kWh/year (4,704.48 baht/year), 6,832.63 kWh/year (16,534.97 baht/year), and 568.29 kWh/year (1,375.25 baht/year), respectively. The investment are 10,000, 6,000, 2,500, and 12,000 baht, respectively. The results show that the internal rate of return and pay back period are 21.37% and 2.06 years for having waste heat recovery, 78.39% and 1.28 years for having low loss ballast, 561% and 0.15 year for using air-condition maintenances, as well as 7.69% and 8.73 years for addition of capacitors.

มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Address: กรุงเทพมหานคร

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

Name: พิชัย นามประกาย

Role: อาจารย์ที่ปรึกษา

Created: 2546

Issued: 2005-08-24

Modified: 2554-03-05

วิทยานิพนธ์/Thesis

ISBN: 9744562528

CallNumber: ET537

tha

DegreeName: วิศวกรรมศาสตรมหาบัณฑิต

Level: ปริญญาโท

Descipline: เทคโนโลยีการจัดการพลังงาน

Grantor: มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

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