TY - JFULL AU - Jung-in Yoon and Seung-taek Oh and Seung-moon Baek and Jun-hyuk Choi and Jong-yeong Byun and Seok-kwon Jeong and Choon-guen Moon PY - 2009/12/ TI - Temperature Control of Industrial Water Cooler using Hot-gas Bypass T2 - International Journal of Mechanical and Mechatronics Engineering SP - 1436 EP - 1441 VL - 3 SN - 1307-6892 UR - https://publications.waset.org/pdf/309 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 35, 2009 N2 - In this study, we experiment on precise control outlet temperature of water from the water cooler with hot-gas bypass method based on PI control logic for machine tool. Recently, technical trend for machine tools is focused on enhancement of speed and accuracy. High speedy processing causes thermal and structural deformation of objects from the machine tools. Water cooler has to be applied to machine tools to reduce the thermal negative influence with accurate temperature controlling system. The goal of this study is to minimize temperature error in steady state. In addition, control period of an electronic expansion valve were considered to increment of lifetime of the machine tools and quality of product with a water cooler. ER -