Difference between revisions of "Altherma Direct to Radiant Floor"
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==== Participants ==== | ==== Participants ==== | ||
− | * | + | * Labs |
==== Collaboration ==== | ==== Collaboration ==== | ||
− | * | + | * Expert/Cochrane to get sensors re-calibrated and for trending histories |
==== Help Wanted ==== | ==== Help Wanted ==== | ||
− | * | + | * Temperature readers to watch gauges and record manually at manifolds |
==== Scheduling & Sequencing ==== | ==== Scheduling & Sequencing ==== | ||
− | * | + | * Need cold outside air temperature |
=== References === | === References === |
Revision as of 17:03, 19 October 2012
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Contents
Altherma Direct to Radiant Floor
Goals of Experiment
- Determine to what extent the Altherma is able to heat the Historical building directly.
- Analyze data to extrapolate what results would be on a 0 degree day.
- Check for leaks in radiant floor loops.
- Collect more data on energy impact of 3-way mixing valve being limited to 70%.
Decisions to be made from Experiment
- What should our minimum storage tank temperature be before the Altherma comes on when solar is lacking?
- Reconcile temperatures between our DDC loop supply and return sensors and the manifold gauges.
- Do we have any leaks?
- Do our DDC loop temp sensors need to be re-calibrated?
- Is 3-way valve limit okay as permanent solution to limit flow through heat exchanger, or is there some benefit from reconfiguring this part of the distribution system?
Expected Outcomes
- Strategy for operation of the Altherma in heating season.
- Knowledge on Altherma's capabilities as emergency heating backup.
- Confidence in our DDC temperature sensors.
- Recommendation on keeping 3-way mixing valve limited or revising piping.
Methodology
General
- Update flow system diagram with measured flows for each zone/pump; impact of taking Annex off loop.
- Re-calibrate T-6, T-7, and manifold temperature gauges.
- Thermal image floor for leaks or inactive sections during heating test.
- Open up manifold and see temperature of zone in and out, temperature of floor, determine how much heat is going to floor.
- Run heating with Altherma only direct to loop.
- Take temperatures throughout process until "steady state" is reached.
- Periodically repeat test at various points in season vs. OA temperature to understand heat loss of building better in relation to outside air temperatures.
- Extrapolate results to 0-degree F outside day.
- Determine/confirm impact of 3-way mixing valve being limited on temperatures and operation.
Process Measurements
- Check calibration of T-6, T-7, selected manifold gauges using handheld meters.
- Install thermocouples with data loggers in selected locations; loops in and out, manifolds in and out, around 3-way valve, on selected floor(s).
- Read and record system temps, outside air temp, thermal image floor temps.
- Record flows in each loop available to read.
Resources Required
- Flow Test Kit (tackle box) - currently not working
- Fluke w/thermocouple sensor, heat tape, insulation
- Thermal imaging camera
- Data Loggers with thermocouple sensors
- Data Logger with current sensors on Altherma
Planning
Participants
- Labs
Collaboration
- Expert/Cochrane to get sensors re-calibrated and for trending histories
Help Wanted
- Temperature readers to watch gauges and record manually at manifolds
Scheduling & Sequencing
- Need cold outside air temperature
References
- Experiment Tracker - summary of all experiments & experiment project management
- Experiment Workbook Template - report template for actual conducting of experiment
Questions
TO DO
- Plan / Do / Study / Act / Repeat