การจัดการใช้ไฟฟ้าในกลุ่มตัวอย่างศึกษาสำหรับโรงสีข้าว โรงแรม และโรงน้ำแข็ง

บทคัดย่อ

This research aims to study a potential of electricity cost saving by power consumption management of the medium enterprises according to the grid at the voltage level of 22–33 kV. The study is conducted by considering for the 2016 tariff rate. To demonstrate the potential of bill saving, the electricity bills of 36 medium enterprises, which are 12 hotels, 12 ice factories, and 12 rice mill factories, in the north of Thailand are analyzed and provided as the management guideline. From the study of the electricity tariff, the results show that any medium enterprise with the electricity energy ratio (kWhP/kWhTotal) lower than 0.4 or the load factor lower than 0.09 always give the electricity bill under TOU rate lower than that under Two-part-tariff. In order to the enterprises using tariff structure based on TOU rate can reduce the energy cost up to a maximum of 0.25 baht/unit, the electric energy ratio (kWhP/kWhTotal) has been decreased by 20%. The appropriate load factor for controlling the demand charge is directly proportional to power ratio (PPeak/P). Then, the appropriate load factor of PPeak should be over 0.6. According to the analysis of those electricity bill samples, the enterprises that use Two-part-tariff show a significant potential to reduce the electricity cost by changing the electricity rate to TOU rate. Furthermore, all samples also provide a high potential to reduce the electricity cost by increasing load factor.