การเลือกใช้ชนิดมาตรวัดน้ำของการประปานครหลวง / สุนทร องสุพันธ์กุล = Type selection of water meters for the Metropolitan Waterworks Authority / Soontorn Ongsupankul
This research has been conducted on the Type Selection of Water Meters for The Metropolitan Waterworks Authority. The research objectives are : to study the basic operation of a rotary piston water meter and a turbine water meter; to study and analyse by comparative method the operational difference of a rotary piston water meter and a turbine water; to study and analyse an appropriate guidelines in selecting the water meter; to present useful information for decision making on future service. In accuracy examination, there are two variables involved: velocity and terbidity. The date on working age of water meters were gathered by testing some 8-year water meters about their accuracy according to ISO. (International Standard Organization). Moreover, an interview approach was applied in order to collect data on relevant factors: the price of water meters, maintenance, equipment, convenience in checking values and the price of spare parts. The value engineering techniques were used in analysing the 7 mentioned factors. The research outcomes indentify that 1) the rotary piston water meter maintains the highest accuracy, is easily equipped and provides correct details; 2) the turbine water meter Type A is low in price; 3) the turbine water meter Type B has a long working age. From the analysis based on the value engineering techniques, the rotary piston water meter gives the best result at present situation.
