SLIDE 1
Outline
- Introduction
- Experiment
- Results and Discussion
- Conclusions
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Application of Oil Flooded Compression with Regeneration to a - - PowerPoint PPT Presentation
Application of Oil Flooded Compression with Regeneration to a - - PowerPoint PPT Presentation
Application of Oil Flooded Compression with Regeneration to a Packaged Heat Pump System RAs: Bin YANG, Timothy BLATCHLEY, Christian BACH PIs: Jim E. BRAUN, Travis HORTON, Eckhard GROLL Outline Introduction Experiment Results and
SLIDE 2
SLIDE 3
Introduction
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Figure 1: Energy consumption in residential sectors in U.S. (http://www.eia.gov/consumption/resident ial/index.cfm) Figure 2: System performance of the air source heat pump at different ambient temperatures (Ramaraj, 2012)
SLIDE 4
Introduction
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(Bell, 2011)
Figure 4: Schematic of the typical heat pump system using oil flooded compression with regeneration technology
SLIDE 5
Introduction
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Hugenroth et al. (2006)
- Studied on the effect of liquid flooding in the
Ericsson cycle;
- Experimentally investigated the oil flooding effect
- n a heat pump system performance.
Bell et al. (2011, 2012)
- Developed a detailed scroll compressor model
with oil flooded technology;
- Investigated the effect of oil flooded compression
technology combined with regeneration on an air source heat pump.
Ramaraj (2012)
- Experimentally tested an oil flooded compressor
prototype. Table 1: Research on the oil flooded compression technology at Herrick Labs
SLIDE 6
Experiment
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Figure 4: Schematic of the packaged heat pump system using oil flooded compression with regeneration technology
SLIDE 7
Experiment
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Figure 5: Experimental setup (a) Overview (b) Oil flooded compressor prototype
SLIDE 8
Experiment
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Test Name Indoor Unit [ºF ] Outdoor Unit [ºF ] Indoor Air Flow rate EDB EWB EDB EWB [CFM] H1 70 <=60 47 43 1750 H2 17 15 H3* minimum
Table 2: Test matrix for oil flooded system
SLIDE 9
Results and Discussion
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5 10 15 20 25 30 35 40 2 4 6 8 10 Oil mass fraction [%] COP improvement [%]
47F(8.33C), 25SH 47F(8.33C), 25SH 47F(8.33C), 50SH 47F(8.33C), 50SH 17F(-8.33C), 40SH 17F(-8.33C), 40SH 5F(-15C), 50SH 5F(-15C), 50SH
5 10 15 20 25 30 35 40
- 10
- 8
- 6
- 4
- 2
2 4 Oil mass fraction [%] Capacity improvement [%]
47F(8.33C), 25SH 47F(8.33C), 25SH 47F(8.33C), 50SH 47F(8.33C), 50SH 17F(-8.33C), 40SH 17F(-8.33C), 40SH 5F(-15C), 50SH 5F(-15C), 50SH
Figure 6: COP improvement for oil flooded system combined with regeneration technology Figure 7: Heating capacity improvement for oil flooded system combined with regeneration technology
SLIDE 10
Results and Discussion
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1 1.2 1.4 1.6 1.8 2 Seasonal efficiency in heating Seasonal efficiency [Btu/(W-h)]
Seasonal efficiency Seasonal efficiency Baseline system Oil flooded system
Seasonal COP [-]
Seasonal COP Seasonal COP
- 30
- 20
- 10
10 20 5 10 15 20 25 30 35 Ambient temperature [C] Heating rate [kW]
Heating load for application 1 Heating load for application 1 Heating load for application 2 Heating load for application 2 Heating capacity of oil flooded system Heating capacity of oil flooded system Heating capacity of single stage system Heating capacity of single stage system
Figure 8: Heating seasonal efficiency and COP improvement of oil flooded system Figure 9: Heating load and heat capacity for different ambient temperatures
SLIDE 11
Results and Discussion
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- 30
- 20
- 10
10 1 2 3 4 Ambient temperature [C] System COP [-]
- 3.43
HPBP Oil flooding system COP for application 1 Oil flooding system COP for application 1 Single stage COP Single stage COP
- 30
- 20
- 10
10 1 2 3 4 Ambient temperature [C] System COP [-]
- 3.43
HPBP Oil flooding system COP for application 2 Oil flooding system COP for application 2 Single stage COP Single stage COP
Figure 10: Oil flooded system COP at different ambient temperatures for application 1 and 2 (a) Application 1 (b) Application 2
SLIDE 12
Conclusions
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- The tested prototype system demonstrates promising application of the oil
flooded compression combined with regeneration technology into the low ambient heat pump;
- One circuit of the indoor coil was used as the oil cooler, leading to a smaller
condenser heating transfer area and potential maldistribution inside the indoor coil;
- A new oil flooded system using a new prototype compressor and oil cooler