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Dates are shown as yymmdd; year, month, day Return to http://my.fit.edu/wx_fit/fitroofdata.php
Wind/Solar System Synopsis: 050726, Tuesday: I was way behind in updating this page. The Air-X wind turbine has been replaced with a Mallard 800G from Mike's Windmill Shop, Show Low AZ. This is an experimenter's special rated at 800W. THe Roberts Hall installation is working well. I have been modifying some of the circuits and changing the outputs; see www.fit.edu/wx_fit/roberts/RH.htm. 031120, Thursday: Status of Data Instrumentation for Meteorological MFP project on "Wind/Solar Energy under Sea Breeze Conditions": 11/20/2003 The dataloggers are not responding to the serial link queries. The WT second brake switch was on over the weekend. I set the switch at /1202EST today, and then set the WT regulator to 27V, but the PV is keeping the battery up to voltage with 1.6A, so the WT is still in regulate mode. Mike uploaded my new multipliers for PV and WT based upon the shunt calibrations of Friday. The PV current is very close to what the controller read this morning. My laptop A: drive has failed, so I couldn't upload directly on Friday. I modified the last program to set hi-res output for the wind speed. The granularity should be reduced. Requires looking at the one-second data directly. The load resistor is still drawing about 1A. The load bank for
this station should draw about 10A to keep up with the current of the charger
sections. Roberts Hall installation and FS-2 tripod mount system was not ready to support for comparison data collection. Time limited due to conflict with ongoing FS-1 operation. Tripod system (FS-2) is still under construction (95% complete). Work on remaining wiring deferred to concentrate on Roberts Hall system. ________________________________________ Accomplishments: The anemometer has been mounted and is working. Problems: To Be Done: A boat winch for hoisting the turbine mast is to be installed to provide a safe method to control the mast raising and lowering. The winch can also pretension a hold-down pipe if mast is stowed in anticipation of a major storm. I've now developed a relay-controlled load to discharge the battery and ensure that the charging current reflects the available wind/solar energy. This must be used judiciously while monitoring battery voltage. The battery must be discharged enough that the turbine and PV charge current is significant; otherwise, they charge the battery to float level and then don't charge much further. (This design will be replicated for the other systems as well.) Complete panel wiring and set datalogger multipliers (requires variant of trailer program with shunts or wire-drop voltage sources). ________________________________________ Developing a relay-controlled load to discharge the battery and ensure that the charging current reflects the available energy. This must be used sparingly while monitoring battery voltage. Battery must be discharged somewhat so turbine and PV charge current is significant; otherwise, they charge the battery to float level and then don't charge much further. The datalogger is not responding to the serial link queries. To Be Done: Install weather radio for field safety (needs 9V regulator or battery). ________________________________________ To Be Done: The Link Air-X wind turbine will be used for the tripod system, We would use both the wind turbine and the existing batteries. This design is for piecewise, hand-carry equipment boxes with interconnecting cables. Mount Air-X turbine to mast (no blades). Complete wiring and signal conditioning. Test datalogger downloads. Compute and upload datalogger multiplier values for calibration. |
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