Date of download: 10/11/2017 Copyright © ASME. All rights reserved. From: Effects of Heat Loss/Gain on the Transient Testing of Heat Wheels J. Thermal Sci. Eng. Appl. 2016;8(3):031003-031003-12. doi:10.1115/1.4032762 Figure Legend: The small-scale heat exchanger geometry with the supporting frame

Date of download: 10/11/2017 Copyright © ASME. All rights reserved. From: Effects of Heat Loss/Gain on the Transient Testing of Heat Wheels J. Thermal Sci. Eng. Appl. 2016;8(3):031003-031003-12. doi:10.1115/1.4032762 Figure Legend: Schematic of the testing facility with the airflow lines, small-scale exchanger, and the test section

Date of download: 10/11/2017 Copyright © ASME. All rights reserved. From: Effects of Heat Loss/Gain on the Transient Testing of Heat Wheels J. Thermal Sci. Eng. Appl. 2016;8(3):031003-031003-12. doi:10.1115/1.4032762 Figure Legend: Test section, sliding and supporting plates, and air ducts

Date of download: 10/11/2017 Copyright © ASME. All rights reserved. From: Effects of Heat Loss/Gain on the Transient Testing of Heat Wheels J. Thermal Sci. Eng. Appl. 2016;8(3):031003-031003-12. doi:10.1115/1.4032762 Figure Legend: Sensible effectiveness versus angle ratio (ψw) for (a) parallel-flow and (b) counterflow heat wheel with the equal supply and exhaust airflow rates

Date of download: 10/11/2017 Copyright © ASME. All rights reserved. From: Effects of Heat Loss/Gain on the Transient Testing of Heat Wheels J. Thermal Sci. Eng. Appl. 2016;8(3):031003-031003-12. doi:10.1115/1.4032762 Figure Legend: Normalized temperature for a parallel-flow heat wheel with the equal supply and exhaust airflow rate at different angle ratios

Date of download: 10/11/2017 Copyright © ASME. All rights reserved. From: Effects of Heat Loss/Gain on the Transient Testing of Heat Wheels J. Thermal Sci. Eng. Appl. 2016;8(3):031003-031003-12. doi:10.1115/1.4032762 Figure Legend: Normalized temperature profile (θ) of a parallel-flow heat wheel with the equal supply and exhaust airflow rate for different values of loss weighting factors: (a) γ′ = 0.1 and (b) γ′ = 0.4

Date of download: 10/11/2017 Copyright © ASME. All rights reserved. From: Effects of Heat Loss/Gain on the Transient Testing of Heat Wheels J. Thermal Sci. Eng. Appl. 2016;8(3):031003-031003-12. doi:10.1115/1.4032762 Figure Legend: The upper and lower limits for the sensible effectiveness of a counterflow heat wheel with the equal supply and exhaust airflow rate with respect to the wheel time constant for different weighting factors and wheel angle ratio ψw

Date of download: 10/11/2017 Copyright © ASME. All rights reserved. From: Effects of Heat Loss/Gain on the Transient Testing of Heat Wheels J. Thermal Sci. Eng. Appl. 2016;8(3):031003-031003-12. doi:10.1115/1.4032762 Figure Legend: The critical ratio of wheel to heat loss/gain time constant (τw/τ′), above which less than 2% uncertainty is expected in the sensible effectiveness

Date of download: 10/11/2017 Copyright © ASME. All rights reserved. From: Effects of Heat Loss/Gain on the Transient Testing of Heat Wheels J. Thermal Sci. Eng. Appl. 2016;8(3):031003-031003-12. doi:10.1115/1.4032762 Figure Legend: Normalized temperature profile with respect to time obtained through the transient testing of the small-scale heat exchanger at different step change amplitudes (Vf = 0.34 m/s): (a) ΔTst = 4.8 °C, (b) ΔTst = 15.8 °C, (c) ΔTst = 20.1 °C, and (d) ΔTst = 37.5 °C

Date of download: 10/11/2017 Copyright © ASME. All rights reserved. From: Effects of Heat Loss/Gain on the Transient Testing of Heat Wheels J. Thermal Sci. Eng. Appl. 2016;8(3):031003-031003-12. doi:10.1115/1.4032762 Figure Legend: The difference in the sensible effectiveness with respect to the wheel angular speed obtained through transient testing of the small-scale heat exchanger (Vf = 0.34 m/s, Redh = 174)

Date of download: 10/11/2017 Copyright © ASME. All rights reserved. From: Effects of Heat Loss/Gain on the Transient Testing of Heat Wheels J. Thermal Sci. Eng. Appl. 2016;8(3):031003-031003-12. doi:10.1115/1.4032762 Figure Legend: Normalized temperature profile with respect to time for different flow rates obtained through transient testing of the small-scale heat exchanger (ΔTst = 7.0 °C): (a) Redh = 26, (b) Redh = 87, (c) Redh = 261, and (d) Redh = 608

Date of download: 10/11/2017 Copyright © ASME. All rights reserved. From: Effects of Heat Loss/Gain on the Transient Testing of Heat Wheels J. Thermal Sci. Eng. Appl. 2016;8(3):031003-031003-12. doi:10.1115/1.4032762 Figure Legend: Sensible effectiveness with respect to Reynolds number for different values of wheel angular speeds obtained through transient testing of the small-scale heat exchanger (ΔTst = 7.0 °C): (a) ω  = 1.00 rpm, (b) ω  = 0.50 rpm, (c) ω  = 0.25 rpm, and (d) 0.10 rpm

Date of download: 10/11/2017 Copyright © ASME. All rights reserved. From: Effects of Heat Loss/Gain on the Transient Testing of Heat Wheels J. Thermal Sci. Eng. Appl. 2016;8(3):031003-031003-12. doi:10.1115/1.4032762 Figure Legend: Comparison between the sensible effectiveness of a heat wheel calculated from the proposed correlation (obtained by SEM and DEM) and the correlations in literature for (a) Ntu0 = 13.1 and (b) Ntu0 = 2.3

Date of download: 10/11/2017 Copyright © ASME. All rights reserved. From: Effects of Heat Loss/Gain on the Transient Testing of Heat Wheels J. Thermal Sci. Eng. Appl. 2016;8(3):031003-031003-12. doi:10.1115/1.4032762 Figure Legend: The difference between the sensible effectiveness of a heat wheel obtained through literature correlations and the proposed correlation according to (a) SEM (b) DEM