"Implementation of a new CTF method stability algorithm into EnergyPlus" by Junghyon Mun and Moncef Krarti

Building Simulation: An International Journal

Article Title

Implementation of a new CTF method stability algorithm into EnergyPlus

Authors

Junghyon Mun, Civil, Environmental, and Architectural, Engineering Department, CB 428, University of Colorado, Boulder, CO 80309, USA
Moncef Krarti, Civil, Environmental, and Architectural, Engineering Department, CB 428, University of Colorado, Boulder, CO 80309, USA

Keywords

conduction transfer function, stability condition, EnergyPlus

Abstract

This paper presents an application of a new stability condition for the conduction transfer function (CTF) method suitable for calculating thermal load attributed to heat conduction through building envelope surfaces. The stability condition is implemented and evaluated into to EnergyPlus, a whole-building energy simulation tool. In particular, the performance of the new stability condition is compared against the stability algorithm currently utilized in EnergyPlus for various wall construction configurations. The results of the comparative analysis indicate that the new stability condition is easier to implement, reduces the computational time, and expands the application range of the CTF method to heavy weight constructions when compared to the current stability algorithm of EnergyPlus.