文档介绍：2011届毕业生
毕业论文
题目: 基于太阳能的微型制冷控制系统研究
院系名称: 电气工程学院专业班级: 电气0702
学生姓名: XXX 学号: XXXXXXXXXX
指导教师: XXXXXXX 教师职称: 教授
2011年 5 月 26 日
摘要
低温储粮是保证粮食长期储藏品质的重要方法,已经成为粮食储藏技术的一个发展方向。但是低温储粮需要消耗大量的能源,对于附加值很低的粮食储藏企业来说是难以接受的。另外,随着人类社会的日益发展,人类对能源需求的急剧增加,世界能源危机日渐突出,太阳能作为一种主要的清洁能源已经受到世界各国的普遍重视。本文设计了一种基于太阳能的低温制冷系统,以满足粮食储藏企业投入成本低、运行成本低的要求。
本设计以太阳能光伏电池板提供能量来源,以低成本半导体制冷片TEC1-12706作为制冷单元,系统通过开关制冷片个数来达到控制制冷量的目的。系统以STC12C5A08S2单片机为核心,采用温度传感器DS18B20来检测粮库的温度,单片机读取温度值后与设定值比较,并采用PID 算法,控制多个电子制冷片的通断,进而控制粮库的温度。外围电路主要有数码管显示电路,电子制冷片的驱动与开关控制电路等。系统具有体积小、重量轻,价格低等优点。
关键词: 太阳能;单片机;半导体制冷
Title Solar-based control System of micro-cooling
Abstract
Low-temperature grain storage is to ensure the long-term storage quality of food, an important method of grain storage technology has e a development direction. But the low-temperature grain storage requires large amounts of energy, food storage for the low value-added businesses, is eptable. In addition, with the increasing development of human society, human beings sharp increase in demand for energy, highlighting the growing world energy crisis, solar energy as a major clean energy has been widespread attention around the world. This paper presents a low-temperature refrigeration system based on solar energy to meet the grain storage businesses to invest in low cost, low operating cost requirements.
The design of solar photovoltaic panels to provide energy sources to low-cost semiconductor cooling piece TEC1-12706 as a refrigeration unit, cooling system piece by the number switch to the purpose of cooling capacity to control. STC12C5A08S2 microcontroller as the core system, using the temperature sensor to detect the grain depots DS18B20 temperature, the microcontroller reads the temperature pared with the set value, and using PID algorithms, control multiple pieces of electronic cooling off, then control the grain depots in the Temperature. Peripheral circuits are digital display circuits, electronic chip cooling the drive and switch control circuit.