การศึกษาการประหยัดพลังงานในโรงงานย้อมผ้า

Energy Conservation in a Dyeing Factory

Name: ประยูร สตารัตน์

Organization : มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Name: Prayoon Starat

keyword: การอนุรักษ์พลังงาน

; โรงงานย้อมผ้า

Abstract: The main thermal equipment of this factory are boilers,drying drums, tentering machine and dyeing machines. It wcas foundthat the lst and Znd law efficiencies and percent of irreversibilityof each equipments are as follows:-Specific steam energy consumption of the tentering machineand dyeing machines were 338.5 kJ/kg product and 2,430 kJ/kgproduct, respectivelyEfficiency improvement of the two boilers can be performedby changing grade of fuel oil used. and reducing percents of excessair. When the grade A of fuel oil is replaced by using grade C oilwith an investment of an electric oil heater of 70,000 baht, moneyamounts of 396,200 and 187,600 baht/year can be saved. Paybackperiods and internal rates of return are 0.26 years and 482% for theboiler #l. In case of reducing the excess air, the lSt law the Zndlaw efficiencies of the boiler #l, when the excess air was reducesfrom 56.6 to 20% were increased to be 74.2 and 18.3% respectively.The fuel expenses of each boiler can be saved 225,600 and 55,900baht respectively. Since the lSt law efficiency of the boiler #lrather low, it should be replaced by a new one. It is found thatthe payback period is 3.56 years with an internal rate of return 39%.Energy losses from the drying drums can be reduced bycoating ceramic insulation on both end of each cylinder drum, thes t 1 and Znd law efficiencies of the #l and #2 drums will beincreased to be 65.9, 45.4% and 49.4, 38.3%, respectively. Theamount of steam used can be saved 25.52 and 8.87% (319,500 and93,000 baht/year) with payback periods of 0.05 and 0.12 years aninternal rates of return of 2,152 and 910% respectively.Performance of the tentering machine can be improved byinsulating back surface of the heating element of the machine. When56% of heat loss is reduced, the lSt law and the 2nd lawefficiencies of the machine are increased to be 35.4 and 4.54%,respectively with 10.84% of steam used can be saved. When 75% ofthe heat loss is reduced, the lst and the Znd law efficiencies are36.4 and 4.58%, respectively with 16.2% of steam used can be saved.Payback periods of each case, when a glasswool insulator sheet isused, are 0.5 and 0.3 years respectively with rates of return of 248and 372%. Condensate from the drying drums and tentering machineshould be mixed up water fed to each boiler. The lst and the Zndlaw efficiencies of the #l and #2 boilers will be 62.4 and 16% and72.9, 19% with saving of 10.58 and 8.4% of the fuel oil,respectively. The payback period of this improvement is very shortwith high internal rate of return.Steam consumption at the drying drums can be reduced byusing individual steam trap at each drum instead of group trapping.With this technique, 10.97% of steam used which costs 136,500 bahtper year and 15.93% of steam used which costs 166,900 baht per yearcan be saved for the #l and the #2 drying drums, respectively. Thepayback period and the internal rate of return will be 3.1 years,43% and 0.9 years, 130% respectively.Condensate from the main equipments can generate 5 tons ofrefrigeration with LiBr-water absorption machine. However, thistechnique is not suitable because of long payback period which is 12.9 years.

มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Address: กรุงเทพมหานคร

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

Name: ทนงเกียรติ เกียรติศิริโรจน์

Role: อาจารย์ที่ปรึกษา

Name: วารุณี เตีย

Role: อาจารย์ที่ปรึกษา

Created: 2534

Issued: 2005-04-15

Modified: 2554-01-21

วิทยานิพนธ์/Thesis

ISBN: 9748155986

CallNumber: ET182

tha

DegreeName: วิศวกรรมศาสตรมหาบัณฑิต

Level: ปริญญาโท

Descipline: เทคโนโลยีพลังงาน

Grantor: มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

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