Paper Conference

Proceedings of SimBuild Conference 2006: 2nd conference of IBPSA-USA


Validation of a Multi-Zone Model with Integrated Energy Equation and Impact of Thermal Mass Modeling Methodology

Jinchao Yuan, Leon R. Glicksman
Building Technology Program, Massachusetts Institute of Technology, 5-418, 77 Massachusetts Ave, Cambridge, MA 02139

Abstract: In this paper, the issue of thermal mass modeling is investigated in the process of validating an integrated multi-zone program that couples energy equation solving for air and thermal mass temperatures. The predicted air temperatures in different spaces are preliminarily compared with the field measurement data to validate the program. The discrepancies are analyzed and explained by the direct radiation absorption of the thermal mass. Sensitivity analysis of the radiation absorption ratio on the air and thermal mass temperature predictions are conducted. The validation is conducted again based on the sensitivity analysis. A simple radiation module is developed to estimate the portion of direct radiation to the thermal mass. The agreement between simulation and measurement data shows overall improvements with proper consideration of the radiation absorption.
Pages: 220 - 230