การพัฒนาระบบตรวจติดตามผลการอนุรักษ์พลังงานจากมาตรการอนุรักษ์พลังงานในโรงงานควบคุม / เบญจวรรณ นิรมิตวสุ = Development of monitoring system for energy conservative savings in designated factories / Benjawan Niramitwasu
The objective of this paper is to show how to apply statistic tools for monitoring energy used, represent energy savings from energy conservation plan and evaluate energy performance in designated factories. The statistic tools that used in this paper are scatter diagram and cumulative sum control chart (CUSUM control chart). After analyzed electric energy and production from 34 factories found that there are 21 factories or 61.76 percent that CUSUM control charts have negative slopes which mean they have energy-saving. The others 13 factories or 38.42 percent have positive slopes on CUSUM control charts which mean they lack energy-saving. The amounts of 21 factories that have energy-saving, have average percentage of savings 7.52. When considering specific factories that have percentage of saving five or more, there are three conservation plans mostly used 1) determination of proper opening – closing times 2) using switch to control opening – closing times 3) using electronic ballast with fluorescent lamp. More over, the approach in this paper also can be used for targeting energy use in designated factories. Good energy management by energy monitoring and targeting is one of techniques to reduce energy cost in factories.
