Development of Teaching Materials on the Energy Education Using Hot-water Appliances : comparison of heat efficiency and carbon dioxide exhaust between an electric pot and a kettle on a gas range when water is boiled in them

摘要

To show a guide to energy-saving promotion activities for household use, demonstration experiments were carried out. The consumpion rates of electricity and fuel were measured when 2 liters of water was boiled in an electric pot and in a kettle on a butane gas range. Net heat efficiency and carbon dioxide (C0_2) exhaust factor were calculated from the experimental and related electric power plants' data. The results are as follows;Net heat efficiency ; 30% (an electric pot), 61% (a kettle on a butane gas range)C0_2 exhaust factor; 179g (0.94kg-C02_/kWh) (an electric pot)71g (O.26kg-C0_2/kWh) (a kettle on a butane gas range)When we need hot water, therefore a kettle on a butane gas range is about two times more energy saving and 60% less CO_2 emission compared with an electric pot.