Abstract
Fixed-bed regenerators (FBRs) are energy recovery exchangers that can significantly reduce the energy required to condition outdoor ventilation air in HVAC systems. FBRs have high sensible effectiveness but produce an outlet air temperature that varies with time. In this paper, a numerical model is developed to evaluate the performance of FBRs, and more specifically, the transient nature of their operation. This transient nature poses difficulties for experimental testing; thus, the developed model consists of an exchanger (FBR) model and a sensor model to differentiate the actual exchanger performance from the performance that would be measured in an experiment. The developed numerical model is validated with experimental data and correlations from the literature. The numerical model is capable of capturing the transient behavior of FBRs and temperature sensors to accurately predict the measurement errors that can occur due to the transient response characteristics of FBRs and sensors at different operating conditions in HVAC applications.
| Original language | English |
|---|---|
| Article number | 121550 |
| Journal | International Journal of Heat and Mass Transfer |
| Volume | 177 |
| DOIs | |
| State | Published - Oct 2021 |
Funding
Financial support from the College of Engineering and the College of Graduate and Postdoctoral Studies of the University of Saskatchewan, National Science and Engineering Research Council (NSERC), Canada and Tempeff North America Inc., Winnipeg, Canada (Project No: 533225-18 ) are much appreciated. The first author also would like to acknwoledge the support from ASHRAE through ASHRAE Graduate-in-Aid award.
Keywords
- Heat recovery
- Performance testing
- Sensible effectiveness
- Sensor transient response
- Temperature measurement
- Test standards (Ashrae standard 84 and CSA C439–18 standard)
- Transient numerical model