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Title: Thermal Comfort Measurement Of Outdoor Air Based On A Microcontroller
Author: Tang-Jen Liu, Ming-Shing Young
Source: 2001 Measurement Science Conference
Year Published: 2001
Abstract: Enthalpy is a result of combining thermodynamic properties. The enthalpy of a given air sample stand for its total energy possessed per unit mass. We will use this index to estimate the heat in the air and discuss the relation between its enthalpy and thermal comfort to the occupants. However, it is a complex process to calculate the enthalpy by using a microcontroller. To make it practical, a simplified equation to approximate the complex original one for calculating the enthalpy of the air was derived. Least Squares Theory provides us a good curve fitting method to find the simplified equation. Finally, a hardware based on a Microchips PIC16C7X family microcontroller, a SMT160-30-18 temperature sensor and a SMTHS10 relative humidity sensor is constructed for measuring relative air conditions and evaluating the enthalpy of the air. We also propose the application of the measuring module in residential ventilation control and thermal comfort distribution measurement.

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