technical information

MoistAirTab™ Technical Information

Design

MoistAirTab uses an equation of state to compute all of the thermodynamic properties. MoistAirTab uses formulations that are approved by the American Society of Heating, Refrigeration and Air-Conditioning Engineers, Inc. (ASHRAE) as documented in the 1997 ASHRAE Handbook: Fundamentals. The equation-of-state used to compute the moist air properties are given in:

Implementation

The core routines in MoistAirTab are written in C++ and compiled using Microsoft's Visual C++ into a stand-alone dynamic link library (DLL). All of the routines use double precision arithmetic (8 byte real). In addition to using standard compiler optimization techniques to speed-up calculations, MoistAirTab employs an innovative and proprietary "caching" strategy to minimize repetitive calculations. Our internal benchmarks indicate that these optimizations give a performance boost of 2 to 5 times over the un-optimized and "un-cached" versions.