| Summary: | 碩士 === 中原大學 === 電機工程研究所 === 97 === Most of heaters use fuel, gas or electricity to produce heat. However, these methods are expensive and generate amount of CO2. In order to protect the environment and save the energy, the solar energy heaters are applied. But solar energy heater can not provide the same performance in both winter and summer. Especially in a rainy day, the solar heater is equal to out of order. At the same time, its transform efficiency is still bad. But we can get heat energy from nature by heat pump through compression, expansion and heat exchange to generate hot water. Comparing with conventional solar energy type of equipments and the other heaters, the heat pump conserves energy and protects environment efficiently.
Traditionally, the heat pump is controlled by Programmable logic controller (PLC). But, PLC has disadvantages of expensive price and huge size. Here, we use MCS-51 to control heat pump instead of PLC. This controller can detect each sensor which is normal or not in order to protect the compressor and prevent fault action. When any sensor is break down, system will detect each fault number and provide the information to user or repairer. This method improves the maintenance of traditional heat pump.
Experimental results through several temperature control measurements show that this work provides a cheap and effective way to control heat pumps. At the same time, we combine single chip and fuzzy control, and we use PT100 circuit and SCR phase adjust module for designing a self-tuning fuzzy controller. This controller can adjust output power of heater slightly and automatically according to environmental changes. In this way, we have better control effects.
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