Scientific Journal of KubSAU

The article deals with the system, providing automatic control of the solar water heating system with the abilities to store in internal memory and to transmit by the cellular network the information about the conditions of the plant and the occurring failure conditions. The common principles of the building the automatic system with the modular principles are shown. The article solves the issue about the quality of the water supply through the quality parameters which provided by the considered system. The methods of the active and passive loss minimizing of the heat of the water in the tank are shown. The usage of the active loss minimizing system was considered. The block-scheme of the implementation of the automatic system with described abilities are shown. The compulsory and auxiliary blocks of the automatic system are shown. The algorithm of the checking of the water supply quality parameters was presented. The study considers methods of the storing of the parameters of the working conditions of the plant and the occurring failure modes as well as the remote information of the attending personnel by the cellular networks. The advantages of the conducting of the system log are shown. The preliminary calculation of the memory capacity for storing the system log was completed. The advantages of the described automatic system with relation to the constructing, controlling, service and research of the described solar water heating systems are shown

The article deals with the necessity of the uninterrupted control of the work quality of the solar heating system. The advantages of the microcontroller systems, which gave their evolution in the last years, are shown. The possibilities of the usage of the microcontroller systems for carrying the work quality control are shown. The electrical principal scheme of the system of the automatic control of the solar water heating which allow to control the work quality control are shown. The system was divided into interconnected parts. The methods of the temperature control by the electronic temperature sensors 18B20, water control by the optical pair with open channel and water quantity meter with the optical wheel, water level in the tank by the ultrasonic sensor of the distance and level of the solar radiation by the pyranometer are shown. The necessarily calculation of the geometric tank sizes and water velocity in the solar collector are carried out. The corresponding hardware resources of the PIC microcontrollers like hardware counters, timer with the ability to allow counting by the external signal (Gate Control), analog-digital converter and fixed voltage reference module are described. The algorithms of the control of the water temperature in the tank and the control of the filling the tank with the hot water from the solar collector are described. The methods of the transmitting information to the operator are shown. The advantages of the microcontroller control are described