Abstract
In this study, experimental and simulation studies were performed in a building equipped with an UFAD system in order to investigate the applicability of a new approach designed for prediction of the energy consumption of a residential building with an UFAD system. In this approach, a zonal model, Pressurized zOnal Model with the Air diffuser (POMA), was coupled with a thermal jet model and integrated into a traditional multizone thermal model. The coupled model was verified experimentally. This integrated model has the ability to take into account the characteristics of an UFAD system and thus accurately simulate its energy consumption. A case study was carried out using both approaches: Multi-zone approach and the new developed integrated zonal/jet/multizone model. A quantitative comparison, in terms of energy demand of a building with an UFAD system, shows that the difference can reach 14% and thus indicates that the traditional multizone modeling approach is not appropriate to use for UFAD system in the building energy prediction.
Highlights
Into two spaces, an occupied room space and a floor plenum space, by a raised floor
This figure indicates a difference of 14% in term of heating energy for a single dwelling house equipped with an UnderFloor Air Distribution (UFAD) system
The zonal model Pressurized zOnal Model with the Air diffuser (POMA) has been coupled with a thermal jet model to predict single dwelling house air thermal behavior under an UFAD heating system
Summary
Into two spaces, an occupied room space and a floor plenum space, by a raised floor. Conditioned airflow. The existing building energy simulation programs, such as (eQUEST, 2010; Trace700, 2010; EnergyPlus, 2011; Klein, 2000), have been proved to be appropriate to predict energy demands of overhead ventilation systems They are not really suitable to be used for buildings associated with particular Heating, Ventilation and Air Conditioning (HVAC) systems, such as UnderFloor Air Distribution (UFAD) systems and displacement ventilation systems. Ahmed Cherif Megri and Yao Yu / American Journal of Engineering and Applied Sciences 7 (1): 23-35, 2014 with the Air diffuser (POMA) (Haghighat et al, 2001; Lin et al, 1999; Megri and Yu, 2010), was coupled with a thermal jet model (Vialle and Blay, 1996) This coupled zonal model was verified experimentally and integrated with a traditional multizone thermal model (ASHRAE Fundamentals, 2005), in order to improve the heating energy prediction of a building equipped with an UFAD system and to take into account the characteristics of the UFAD systems and the thermostat location. A case study was carried out on a building associated with an UFAD system to demonstrate the importance of the new developed approach compared to the existing multizone thermal models through a comparative study
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