A Novel Design for a Cheap High Temperature Solar Collector: The Rotating Solar Boiler

2009 ◽  
Vol 131 (2) ◽  
Author(s):  
Jeroen P. H. van Luijtelaer ◽  
Maaike C. Kroon
Keyword(s):  
High Temperature ◽  
Ambient Temperature ◽  
Solar Collector ◽  
High Performance ◽  
Rotation Speed ◽  
Economical Analysis ◽  
Evacuated Tube Collectors ◽  
Evacuated Tube ◽  
Novel Design ◽  
Transparent Tube

In this work a novel type of high temperature solar collector is designed: the rotating solar boiler. This rotating solar boiler consists of two concentric tubes. The inner tube, called absorber, absorbs sunlight and boils water. The outer transparent tube, called cover, is filled with air. The boiler rotates to completely prevent convection in the insulating air layer in between the tubes. In this way, the heat loss is reduced considerably resulting in a solar collector that is more efficient than conventional flat plate solar collectors. The prototype built measured 1.20 m length and 0.50 m diameter (illuminated area is 0.60 m2) for the copper absorber with high performance sputtered coating. The cover with a diameter of 0.90 m was made of transparent polyvinylchloride film. The rotation speed was 60 rpm. The efficiency was 61% and the boiler delivered 0.34 kW of 100°C steam at an ambient temperature of 7°C. A model was developed to predict the performance of the prototype. The model predicts an efficiency of 62%, which is in agreement with the measured experimental efficiency. An economical analysis was performed as well. The rotating solar boiler is much cheaper than conventional evacuated tube collectors, especially because the rotating solar boiler is lightweight.

scholarly journals Comparative Analysis of Exergy and Efficiency for Stratified Thermal Storage Tank with Solar Flat Plate and Evacuated Tube Collectors

2016 ◽  
Vol 855 ◽  
pp. 114-118 ◽  
Author(s):  
Sukruedee Sukchai ◽  
Yodthong Mensin ◽  
Wikarn Wansungnern
Keyword(s):  
Flat Plate ◽  
Solar Collector ◽  
Storage Tank ◽  
Water Heating ◽  
Water Heater ◽  
Solar Water ◽  
Water Heaters ◽  
Evacuated Tube Solar Collector ◽  
Evacuated Tube Collectors ◽  
Evacuated Tube

In recent years, solar water heating technology has got the major importance in water heating applications. For the efficient and effective working of solar water heaters, storage of the hot water is the main issue in this water heating technologies. This paper mainly presents the exergy and efficiency comparison between the solar flat plate water heater and evacuated tube water heater. A five level stratified thermal storage tank is designed and developed for this analysis. At each level of the tank, temperature of the water is collected for each one hour interval from 9:00 to 16:00 hours in both cases and the overall exergy and efficiency of the two water heaters were calculated. The average efficiency of all the levels for flat plate and evacuated tube collectors are 7.91% and 8.20% respectively. The overall system efficiency is obtained as 39.54% for flat plate and 41.00% for evacuated tube solar collector. At each level exergy is calculate for both systems and the average exergy of all the levels for flat plate collector is 4.243 kW and for evacuated tube solar collector is 4.371 kW.

scholarly journals Exergy Analysis of Two Kinds of Solar-Driven Cogeneration Systems in Lhasa, Tibet, China

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Haofei Zhang ◽  
Bo Lei ◽  
Tao Yu ◽  
Zhida Zhao
Keyword(s):  
Solar Collector ◽  
Exergy Analysis ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Solar Collectors ◽  
Heating Water ◽  
Different Temperatures ◽  
Parallel Mode ◽  
Evacuated Tube Collectors ◽  
Evacuated Tube

In this study, an exergy analysis of two kinds of solar-driven cogeneration systems consisting of solar collectors and an organic Rankine cycle (ORC) is presented for series mode and parallel mode. Three kinds of solar collectors are considered: flat-plate collectors (FPC), evacuated tube collectors (ETC), and parabolic trough collectors (PTC). This study mainly compares the exergy output of the two kinds of solar cogeneration systems under different temperatures of the return heating water and different inlet temperatures of the solar collectors. This study shows that, from the perspective of Wnet or E̲n, the parallel mode is superior to the series mode. From the perspective of Ez, the parallel mode is superior to the series mode when the solar collector is FPC; however, the series mode is superior to the parallel mode when the solar collector is PTC. When the solar collector is ETC, the result depends on the temperature of the return heating water. When the temperature of the return heating water is low (below 46°C), the series mode is better, and when the temperature of the return heating water is high (above 46°C), the parallel mode is better.

Parametric Study of a Flat Plate Wick Assisted Heat Pipe Solar Collector

2013 ◽  
Vol 135 (3) ◽  
Author(s):  
Brahim Taoufik ◽  
Mhiri Foued ◽  
Jemni Abdelmajid
Keyword(s):  
Flat Plate ◽  
Heat Pipe ◽  
Solar Collector ◽  
Solar Collectors ◽  
Absorber Plate ◽  
Steady State Condition ◽  
Collector Efficiency ◽  
Evacuated Tube Collectors ◽  
Gap Spacing ◽  
Evacuated Tube

The use of heat pipes in solar collectors offers several advantages regarding flexibility in operation and application, as they are very efficient in transporting heat even under a small temperature difference. Compared with other systems powered by evacuated tube collectors or flat plate solar collectors using a wickless heat pipe, little attention has been paid to a flat plate solar collectors wick assisted heat pipe. In this paper an analytical model based on energy balance equations assuming a steady state condition was developed to evaluate the thermal efficiency of a flat plate wick assisted heat pipe solar collector. Parameters which affect the collector efficiency are identified, such as tube spacing distance, gap spacing between the absorber plate and the glazing cover, and the emissivity of the absorber plate. The results reflect the contribution and significance of each of these parameters to the collector overall heat loss coefficients. Three heat pipe working fluids are examined and results show that acetone performs better than methanol and ethanol.

scholarly journals “The Contactless Badge" designed IR - Thermometer Evaluating Temperature & Social/Physical Distancing by Fabricating the MLX90614 Thermal Sensor during Covid- 19 Global Emergency

2021 ◽  
Author(s):  
Abhijeet Kumar ◽  
Arpit Kumar
Keyword(s):  
High Temperature ◽  
Surface Temperature ◽  
Ambient Temperature ◽  
Primary Healthcare ◽  
Thermal Sensor ◽  
Ir Radiation ◽  
Thermal Change ◽  
Novel Design ◽  
Distance Measuring

Abstract The study ameliorates the feasibility of IR thermometer, and to introduce a novel design with upgraded applications & functions. The custom compact device (shape illustrates a “Badge”) measures the surface temperature of a body and received data processed through a microcontroller (AtMega328P). The device functions in a way that if there is any thermal change from ambient temperature (D-1 m), the mode is activated and triggers a pre-defined alert. For distance measuring, it measures the intensity of IR radiation emitted by a body from a particular direction. It also reads the temperature when it comes across a body. It will provide an optimum way in the primary healthcare instrumentation and helpful for noncontact, quick, and accurate measurement of moving and high temperature body.

scholarly journals “The Contactless Badge” designed IR Thermometer Evaluating Temperature & Social Physical Distancing Fabricating the MLX90614 during Covid 19

2021 ◽  
Author(s):  
Abhijeet Kumar ◽  
Arpit Kumar
Keyword(s):  
High Temperature ◽  
Surface Temperature ◽  
Ambient Temperature ◽  
Primary Healthcare ◽  
Ir Radiation ◽  
Thermal Change ◽  
Novel Design ◽  
Distance Measuring

<p></p><p>The study ameliorates the feasibility of IR thermometer, and to introduce a novel design with upgraded applications & functions. The custom compact device (shape illustrates a “Badge”) measures the surface temperature of a body and received data processed through a microcontroller (AtMega328P). The device functions in a way that if there is any thermal change from ambient temperature (D-1 m), the mode is activated and triggers a pre-defined alert. For distance measuring, it measures the intensity of IR radiation emitted by a body from a particular direction. It also reads the temperature when it comes across a body. It will provide an optimum way in the primary healthcare instrumentation and helpful for noncontact, quick, and accurate measurement of moving and high temperature body.</p><br><p></p>

ARMCO PH 13-8Mo

Alloy Digest ◽  
1990 ◽  
Vol 39 (2) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Stress Corrosion ◽  
Tensile Properties ◽  
High Performance ◽  
High Strength ◽  
Heat Treating ◽  
Temperature Performance

Abstract ARMCO PH 13-8Mo is designed for high-performance applications requiring high strength coupled with excellent resistance to corrosion and stress corrosion. It has excellent toughness, good transverse properties and excellent forgeability. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-224. Producer or source: Baltimore Specialty Steels Corporation. Originally published May 1969, revised February 1990.

INCOLOY ALLOY 864

Alloy Digest ◽  
1998 ◽  
Vol 47 (2) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Mechanical Strength ◽  
High Performance ◽  
Exhaust System ◽  
Good Combination ◽  
Fatigue Properties ◽  
Temperature Performance ◽  
Incoloy Alloy ◽  
Oxidation And Corrosion

Abstract Incoloy Alloy 864 is a high performance alloy developed specifically for automotive exhaust system flexible couplings and other exhaust applications. The alloy has a good combination of oxidation and corrosion resistance, with good mechanical strength, stability, and fatigue properties. This datasheet provides information on composition, physical properties, and elasticity. It also includes information on high temperature performance and corrosion resistance as well as joining. Filing Code: SS-708. Producer or source: Inco Alloys International Inc.

HITACHI METALS SLD-MAGIC

Alloy Digest ◽  
2020 ◽  
Vol 69 (10) ◽  
Keyword(s):  
High Temperature ◽  
Physical Properties ◽  
Tool Steel ◽  
High Performance ◽  
Cold Work ◽  
Heat Treating ◽  
Temperature Performance ◽  
Mold Fabrication ◽  
Cold Work Tool Steel

Abstract Hitachi Metals SLD-Magic is a high-performance alloy cold-work tool steel that is characterized by improved mold lifespan and easy mold fabrication. This datasheet provides information on composition, physical properties, hardness, elasticity as well as fatigue. It also includes information on low and high temperature performance as well as heat treating, machining, and joining. Filing Code: TS-802. Producer or source: Hitachi Metals Ltd.

Use of activated carbon to remove undesirable residual amylase from refinery streams

2017 ◽  
pp. 96-103 ◽  
Author(s):  
Gillian Eggleston ◽  
Isabel Lima ◽  
Emmanuel Sarir ◽  
Jack Thompson ◽  
John Zatlokovicz ◽  
...  
Keyword(s):  
Activated Carbon ◽  
High Temperature ◽  
High Performance ◽  
Activated Carbons ◽  
Amylase Activity ◽  
Sugar Industry ◽  
End User ◽  
Customer Complaints ◽  
Carry Over ◽  
Very High

In recent years, there has been increased world-wide concern over residual (carry-over) activity of mostly high temperature (HT) and very high temperature (VHT) stable amylases in white, refined sugars from refineries to various food and end-user industries. HT and VHT stable amylases were developed for much larger markets than the sugar industry with harsher processing conditions. There is an urgent need in the sugar industry to be able to remove or inactivate residual, active amylases either in factory or refinery streams or both. A survey of refineries that used amylase and had activated carbon systems for decolorizing, revealed they did not have any customer complaints for residual amylase. The use of high performance activated carbons to remove residual amylase activity was investigated using a Phadebas® method created for the sugar industry to measure residual amylase in syrups. Ability to remove residual amylase protein was dependent on the surface area of the powdered activated carbons as well as mixing (retention) time. The activated carbon also had the additional benefit of removing color and insoluble starch.

Mechanism-Based Design for High-Temperature, High-Performance Composites. Book 1

1997 ◽  
Author(s):  
Anthony G. Evans ◽  
Frederick A. Leckie ◽  
J. W. Hutchinson
Keyword(s):  
High Temperature ◽  
High Performance
Sign in / Sign up

Export Citation Format

Share Document