Comparative study on dual-source direct-expansion heat pumps based on different composite concentrating photovoltaic/fin evaporators

2022 ◽  
Vol 306 ◽  
pp. 118073
Author(s):  
Zhiying Song ◽  
Jie Ji ◽  
Yuzhe Zhang ◽  
Jingyong Cai ◽  
Zhaomeng Li
Keyword(s):  
Comparative Study ◽  
Heat Pumps ◽  
Direct Expansion ◽  
Dual Source

Studies of Heat Pumps Using Direct Expansion Type Solar Collectors

Solar Energy ◽  
2003 ◽  
Author(s):  
Sadasuke Ito ◽  
Naokatsu Miura ◽  
Yasushi Takano
Keyword(s):  
Heat Pump ◽  
Thermal Performance ◽  
Pressure Loss ◽  
Heat Pumps ◽  
Hot Water ◽  
Photovoltaic Module ◽  
Direct Expansion ◽  
Reduced Pressure ◽  
In Series ◽  
Hot Water Supply

A photovoltaic and thermal hybrid panel which was made of an aluminum roll -bond panel with a photovoltaic module on the surface was developed recently for use as an evaporator of a heat pump for residential hot water supply and room heating.1) Pressure loss of the refrigerant at the evaporator was large. Therefore, in the present study, shapes of the inlet and the outlet of the panel were modified to reduce pressure loss; also, thermal performance of the heat pump which adopted three evaporator panels connected in series was examined. Total area of the panels was about 1.9 m2 and the rated capacity of the compressor was 250 W. These modifications reduced pressure loss and improved thermal performance. The effect of the location of the feeler bulb on performance of the heat pump was also examined. It was inferred that the feeler bulb fixed on the tube at the outlet of the evaporator should be as close as possible to the evaporator outlet.

Acquisition time, radiation dose, subjective and objective image quality of dual-source CT scanners in acute pulmonary embolism: a comparative study

2020 ◽  
Vol 30 (5) ◽  
pp. 2712-2721 ◽  
Author(s):  
Waleed Abdellatif ◽  
Eric Esslinger ◽  
Kevin Kobes ◽  
Amanda Wong ◽  
Jennifer Powell ◽  
...  
Keyword(s):  
Pulmonary Embolism ◽  
Image Quality ◽  
Radiation Dose ◽  
Comparative Study ◽  
Acute Pulmonary Embolism ◽  
Acquisition Time ◽  
Dual Source Ct ◽  
Dual Source ◽  
Ct Scanners

Studies of Heat Pumps Using Direct Expansion Solar Collectors

2002 ◽  
Vol 2002.12 (0) ◽  
pp. 493-496
Author(s):  
Sadasuke ITO ◽  
Naokatsu MIURA ◽  
Yasushi TAKANO
Keyword(s):  
Heat Pumps ◽  
Solar Collectors ◽  
Direct Expansion
Sign in / Sign up

Export Citation Format

Share Document