DESIGN AND IMPLEMENTATION OF INDUCTION HEATING ELEMENTS WATER HEATERS AS THE DISPENSER SYSTEM WITH MONITORING

• Main Author: Effendi, Rizal
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/46961
• Institution: Institut Teknologi Bandung

Heating system is an important part of household appliances such as water dispenser. Most water dispensers use resistance heating element made of certain metal alloys such as nichrome or nickel – chromium in form of wire. When electric current flows through this heating element, the electrical energy is dissipated by its electrical resistance and converted into heat. In this way, significant amount of energy will lose and the efficiency will be reduced. Induction heating has been used in household appliances in form of induction stoves. The application of this type of heating for water dispenser is, however, still very rare. In this work which is part of an undergraduate final project, an induction heating module is designed and implemented to replace the existing resistive-element heater of a standard household water dispenser. A ZVS (Zero-Voltage Switching) converter based on Mazzilli’s flyback-driver circuit is used to generate oscillating currents to produce heat for the heating container inside the dispenser through induction heating. With electric power of about 274W this heating module is able to heat the water from room temperature to about 90OC in about 15 minutes. The energy consumed is 40% higher than conventional heater. However, this could be improved by adding thermal insulation for the hot water container. For a comparison purpose, the effects of adding insulating materials surrounding the wall of the cold-water container were measured and are able to maintain the water temperature in longer time. As part of developing a smart water dispenser, the above heating module is integrated with an Internet of Things (IoT) based monitoring system whose data including water temperature and volume can be remotely monitored using Android mobile devices.