Design, development and demonstration of environmental measuring stations with photovoltaic energy supply

Abstract

The development aim is to limit the energy requirement for continuous operation of the environmental measuring station. The gas analyzers used in the stations were modified for 24 volt direct current operation. A gas analyzer which functions on the principle of UV absorption is used to measure ozone. For NO2 measurement, an instrument was developed by the Dashibi corporation/USA. Its basic features correspond to those of the ozone photometer. If permitted by the concentration level, measuring operation is reduced when the energy reserves are low. Furthermore, the relevant meteorological data is recorded. A low-power data acquisition system with data storage on buffered RAM storage is used for data acquisition and control of the analyzers. The data are called up via radio-telephone. The plant has been in operation for one year. Though the charging control of the battery set has to be improved the energy management concept has essentially been confirmed.