目前,世界各国都对能源,特别是热能的节约工作非常重视。许多国家对热能的消耗采用直接显示和计量的办法加以监视,取得了十分明显的节能效果。我国也正进行这方面的工作。清华大学自动化系与国家能源管理部门和上海大华仪表厂密切配合开展了对热水热 At present, all countries in the world attach great importance to the conservation of energy, especially heat energy. Many countries monitor the consumption of heat energy by direct display and measurement, and have achieved very obvious energy-saving effects. Our country is also carrying out this work. The Automation Department of Tsinghua University closely cooperated with the National Energy Management Department and Shanghai Dahua Instrument Factory to carry out hot water heating