冰蓄冷中央空调及其相关系统学位论文.doc

冰蓄冷中央空调及其相关系统  PAGE 23 PAGE  摘 要 冰蓄冷中央空调系统是现代化大型建筑物不可缺少的配套设施之一，冰蓄冷空调主要在夜间低谷电力时段将建筑物所需空调冷量部分或全部制备好，并以冰的形式储存起来，在非电力低谷时段融冰供冷的一种空调系统。由于低谷电力时段电价较低，用户得以大幅度降低空调使用费。由于冰蓄冷中央空调行业是一个刚刚形成的行业，冰蓄冷中央空调在我国具有很好的发展前景。本文的意义在于以便使冰蓄冷中央空调行业能迅速发展，同时宏观上起到移峰填谷的作用，平衡电网需求侧的运行。 随着科学技术的日益成熟，利用变频器、PLC、数模转换模块、温度传感器、温度模块等器件的有机结合，构成温差闭环自动控制系统，自动调节水泵的输出流量，达到节能目的的提???了可靠的技术条件。 关键词：PLC，冰蓄冷技术，中央空调，控制功能 ABSTRACT Ice-Thermal-Storage Center Air Conditioning System is one of modern large-scale building essential supporting facilities, Ice-Thermal-Storage Center Air Conditioning System is a machine system that can turn electricity into cold energy at night when the need for electricity is low and store the cold energy in the state of ice. In the daytime that the need of electricity is high the system provides cold air for the building by melting the ice. In this way the user can save a lot of money on account that the electricity fee is high in daytime than at night. So the writer draws the conclusion that Ice-Thermal-Storage Center Air Conditioning System, as new product, has a bright business future in China. The conclusion drawn by the writer in this thesis can be used as reference for the Ice-Thermal-Storage Center Air Conditioning System business; the government officer can balance the need of electricity between daytime and night theoretically using the principles announced by the writer. Along with the science and technology matures, using organic combination of inverter, PLC, digital analog conversion module, temperature sensor and temperature module to thermoelectric closed-loop automatic control technology which can adjust output flow rate automatically to save energy. Key words: PLC； The ice storage technology， The central air conditioning， Control function 目 录 绪论1 1 冰蓄冷空调的简介2 1.1 冰蓄冷空调的原理2 1.2 冰蓄冷空调的系统构成图2 1.3 冰蓄冷空调的应用3 1.4 冰蓄冷空调的实用性3 1.5 冰蓄冷中央空调与传统中央空调的区别4 2 冰蓄冷中央空调的制冷机组6 2.1制冷压缩机的分类6 2.2冰蓄冷中央空调的离心式制冷压缩机6 2.3离心式