Development and validation of quasi-steady-state heat pump water heater model having stratified water tank and wrapped-tank condenser
| Autor: | Van D Baxter, Ahmed Elatar, Bo Shen, Kashif Nawaz |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
020209 energy
Mechanical Engineering Nuclear engineering Design tool 02 engineering and technology Building and Construction Energy factor 021001 nanoscience & nanotechnology Storage water heater law.invention System model law Heat exchanger 0202 electrical engineering electronic engineering information engineering Environmental science Vapor-compression refrigeration 0210 nano-technology Condenser (heat transfer) Heat pump |
| Zdroj: | International Journal of Refrigeration. 87:78-90 |
| ISSN: | 0140-7007 |
| DOI: | 10.1016/j.ijrefrig.2017.10.023 |
| Popis: | Heat pump water heater systems (HPWH) introduce new challenges for design and modeling tools, because they require vapor compression system balanced with a water storage tank. In addition, a wrapped-tank condenser coil has strong coupling with a stratified water tank, which leads HPWH simulation to a transient process. To tackle these challenges and deliver an effective, hardware-based HPWH equipment design tool, a quasi-steady-state HPWH model was developed based on the DOE/ORNL Heat Pump Design Model (HPDM). Two new component models were added via this study. One is a one-dimensional stratified water tank model, an improvement to the open-source EnergyPlus water tank model, by introducing a calibration factor to account for bulk mixing effect due to water draws, circulations, etc. The other is a wrapped-tank condenser coil model, using a segment-to-segment modeling approach. The HPWH system model was validated against available experimental data. After that, the model was used for parametric simulations to determine the effects of various design factors. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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