| Title |
Simple Modeling of Floor Heating Systems based on Optimal Parameter Settings |
| Authors |
Seung Hoon Park ; Yong Sung Jang ; Eui-Jong Kim |
| DOI |
https://doi.org/10.6110/KJACR.2017.29.9.472 |
| Keywords |
바닥 난방 ; 최적화 ; RC모델 ; 트랜시스 Floor heating ; Optimization ; RC model ; TRNSYS |
| Abstract |
Radiant floor heating systems have been used as common heating supply systems in most residential buildings in Korea. Since the system uses a floor as thermal storage, proper control strategy should be adopted to avoid over- or under-heating problems. So far, studies related to control of the floor heating system have been conducted based on computer simulations. The active layer in TRNSYS is known for its usability as a floor heating system model and is integrated with the TRNSYS building model (Type 56). However, floor heating system simulations with the active layer are operated only if pre-defined minimum mass flow rate is ensured. This study proposes a simple RC (Resistance-Capacitance) model for radiant floor heating systems. Model parameters such as Rs and Cs are defined by optimization. The active layer, in this study, is used as the target system to search for optimal values. A TRNOPT optimization tool was used to conduct optimization under given simulation conditions. The RC model with optimal parameters are tested in other mass flow rates that were not used during optimization. Results reveal the RC model describes the active layer with successfully optimized model parameters. The RC model has fewer model limitations, and is expected to be used for various target systems, e.g. experimental data of a real radiant heating system. |