hvac systems 基本例句 空调系统 Analyses the characteristics of energy consumption of HVAC systems, and presents the status of the controller auto- tuning, set- point optimization and energy management for HVAC systems. 分析了暖通空调优化能量消耗的特点，介绍了暖通空调控制系统基础控制器参数整定、工作点优化和能量管理的现状。 cnki