BTU Calculator for Solar Thermal Water Heater

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SUMMARY

The discussion focuses on developing a BTU calculator for a solar thermal water heater using LabVIEW for data acquisition. The user, Chris, seeks to calculate BTU by utilizing the internal heat exchanger's temperature readings and flow meter data. The correct formula involves multiplying the flow rate in pounds per hour by the temperature difference between the inlet and outlet of the heat exchanger. This approach provides a clear method for calculating thermal energy transfer in the system.

PREREQUISITES
  • Understanding of BTU calculations in thermal systems
  • Familiarity with LabVIEW for data acquisition
  • Knowledge of heat exchanger operation and efficiency
  • Experience with flow meter technology and pulse output signals
NEXT STEPS
  • Research the specific equations for BTU calculations in thermal systems
  • Learn how to implement LabVIEW for real-time data acquisition
  • Explore the principles of heat exchanger design and performance
  • Investigate flow meter calibration and data interpretation techniques
USEFUL FOR

Engineers, technicians, and hobbyists involved in solar thermal energy systems, particularly those looking to optimize heat transfer calculations and data acquisition methods.

cwetteland
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I am trying to develop a btu calculator for my solar thermal water heater. I would eventually like to use labview to do the acquisition. I have an internal heat exchanger and know the temperature before and after it enters the exchanger. I have a flow meter w/ a pulse output. What would the equation look like to do the calculation? Can I use the volume of the exchanger (approx 2 gallons) multiplied by the gallon to pound conversion, then multiplied by the flow rate over the period of the exchange?

Thanks


Chris
 
Engineering news on Phys.org
Welcome to PF.

It's flow rate in lb/hr times the temperature difference between the in and out of the heat exchanger.
 

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