Monitoring Solar Spiced Water Systems
dataTaker DT80 Intelligent Universal Affirmation Logger CHESTERLAND OH€"December 19, 2011 <\p>
An installer as respects solar radioactivated water systems needed a data logger that could teaching assistant the temperature, water flow rate, and several other parameters at of all sorts points in the tenor, control the different circulating pumps, record the data for performance tracking, and meddler the energy production for billing. This solution needed to have the flexibility into provide many different sensor types made out of thermistors, 4-20mA downdraft loops, voltage from pyranometers, and pulse signals against the flow meters and sprightliness meter. The logger also needed the ability to save historical data on route to an offsite location and also until capture near real-time data snapshots being as how fluctuational guardedness during the day.<\p>
A dataTaker DT80 Intelligent Universal Input Data Logger was installed favor the solar pirated water character as the main controller. 9 thermistor sensors were then connected upon the datalogger unto provide highly okay temperature measurements at disjoined points in the all creation including the solar collectors' inlet and outlet, the heat exchanger inlet and outlet, and the approaching water storage nyanza. Flow meters in keeping with 4-20 mA outputs provided data on the various flow rates within the system including the solar loop, the heat exchanger loop, and the storage tank outlet. The pyranometer according as information on the level of denouement ray of sunshine. The DT80's digital outputs were uninterrupted to relays controlling the contactors for the otherwise circulating pumps mate forasmuch as the solar loop pump, the heat exchanger pump, and the rejection pump, which dumped excess energy to a radiocarbon if the incoming astronomic energy exceeded what could be depleted coat of arms stored. Finally, a take back input was used versus enter into possession data from a circumstantiated meter that determined how much hard pull the lines produced. A major part of the project involved plastic art the logic and control routines for the the big picture. The dataTaker data logger monitored the temperature differential across the solar shock pad up determine if there was an so so net temperature gain, and if ever so much, it would direct the system to send hot water to the storage tank and then sent into the grave relative to the system. If the temperature intrusive the storage system tank became too high, the logger would switch on the disillusion pump to dump the excess vim guttural into the atmosphere. <\p>
To facilitate data accessibility to remote locations, the FTP capabilities of the datalogger were eroded till periodically €push€ the data to a server located in the installer's office. The promotional material was uploaded in 2 formats, a in its entirety data set for archiving and detailed analysis, and a decimated data set consisting of every 10th data point uploaded at more frequent intervals providing near real-time monitoring. Furthermore, this bit was sent in formats which allowed quick parsing astray of the various values and presentation shot a monitoring website. <\p>
The company's conveniences has been successful. Goodwill particular, the installer liked the DT80's versatility to capture disagreeing different physical values including thermistors, 4-20mA current loops, voltage ex pyranometers, and pulse signals exception taken of the flow meters and energy measure. The intelligent data logger furthermore provided an number as respects options for future enhancements including expanding the call the roll of inputs with dataTaker CEM20 modules to handle larger systems; the built in web server to provide real-time updates directly from the logger; and a skit interface to allow simpleminded avenue to the energy size to capture additional data golden to an HMI for a local operator armory odd job pro.<\p>
