scholarly journals On the Development of a Low Cost Pyrheliometer

2010 ◽  
Author(s):  
Michael Gnos ◽  
Brenton Greska ◽  
Anjaneyulu Krothapalli
Keyword(s):  
Low Cost ◽  
Normal Incidence ◽  
Manufacturing Cost ◽  
Florida State University ◽  
State University ◽  
Autonomous Operation ◽  
Solar Tracker ◽  
Tracking Device ◽  
The Cost ◽  
Better Than

A low cost pyrheliometer, based on a thermoelectric sensor, was developed at the Energy and Sustainability Center at the Florida State University. In addition, an inexpensive double-axis tracking device, capable of autonomous operation, enables the pyrheliometer to operate as a stand-alone system. Widely available off-the-shelf components were used and compromises in accuracy and time responsiveness were made in order to keep the cost low. The obtained data was compared with an Eppley Normal Incidence Pyrheliometer (NIP) using model ST-1 solar tracker. Steady state values of irradiance were measured with an accuracy better than ±2%. Transient measurements are time delayed by a thermal lag of about two minutes, which leads to a high error for instantaneous measured values. However, the integrated irradiance over the course of any given day yields irradiation values with accuracy better than ±2%, even on days when the sun and clouds quickly alternate. Based on a manufacturing cost analysis, the prototype pyrheliometer is anticipated to cost less than $500 if mass-produced.

scholarly journals On the Development of a Low Cost Pyrheliometer

2011 ◽  
Vol 133 (3) ◽  
Author(s):  
Michael Gnos ◽  
Brenton Greska ◽  
Anjaneyulu Krothapalli
Keyword(s):  
Low Cost ◽  
Normal Incidence ◽  
Manufacturing Cost ◽  
State University ◽  
Autonomous Operation ◽  
Order Of Magnitude ◽  
Solar Tracker ◽  
Tracking Device ◽  
The Cost ◽  
Better Than

A low cost pyrheliometer, based on a thermoelectric sensor, was developed at the Energy and Sustainability Center at the Florida State University. In addition, an inexpensive double-axis tracking device, capable of autonomous operation, enables the pyrheliometer to operate as a stand-alone system. Widely available off-the-shelf components were used and compromises in accuracy and time responsiveness were made in order to keep the cost low. The obtained data was compared with an Eppley Normal Incidence Pyrheliometer (NIP) using model ST-1 solar tracker. Steady state values of irradiance were measured with an accuracy better than ±2%. Transient measurements are time delayed by a thermal lag of about 2 min, which leads to a high error for instantaneous measured values. However, the integrated irradiance over the course of any given day yields irradiation values with accuracy better than ±2%, even on days when the sun and clouds quickly alternate. Based on a manufacturing cost analysis, the prototype pyrheliometer system is anticipated to cost an order of magnitude less than commercially available products if mass-produced.

From a Seed to a Need: the Growth of Shape Memory Applications in Europe.

1991 ◽  
Vol 246 ◽  
Author(s):  
Ir. J. Van Humbeeck
Keyword(s):  
Shape Memory ◽  
Low Cost ◽  
Marketing Research ◽  
Research Approach ◽  
Manufacturing Cost ◽  
Product Price ◽  
Key Factor ◽  
Place Promotion ◽  
Memory Applications ◽  
The Cost

AbstractA more systematic marketing research approach has finally revealed good ideas anticipating a market need for the use of shape memory alloys. The success of those new ideas, prototypes and applications are analysed in terms of “the value of the function”, defined as the importance of the function divided by the cost of providing the function. A high importance and/or a low cost of the function are thus the basic requirements for the successful introduction of shape memory applications. Attention is also paid to the way how the 4 P's, product, price, place, promotion (the marketing mix) are applied by the European companies. Those different items will be illustrated on the basis of some small-, medium- and largescale applications, used in different markets. “to the point research”, fundamental and applied, on material properties as well as on manufacturing (cost reduction) is being discussed as the key factor to increase the function value.

scholarly journals Sensorless dual axis solar tracker using improved sun position algorithm

2020 ◽  
Vol 11 (3) ◽  
pp. 1305
Author(s):  
Chan Men Loon ◽  
Muhamad Zalani Daud
Keyword(s):  
Low Cost ◽  
Percentage Error ◽  
Total Output ◽  
Solar Pv ◽  
Pv Systems ◽  
Measured Angle ◽  
Solar Tracker ◽  
Fixed Panel ◽  
Fixed System ◽  
Better Than

This paper presents development of a prototype sensorless dual axis solar tracker for maximum extraction of solar energy. To prove the concept and evaluate the proposed algorithm, a low cost widely availabe materials were used which was programmed based on Arduino microcontroller. The porposed algorithm works based on two search methods namely the global search that approximates the best point location in a region, and local search that further determines the actual sun’s position. Experimental results showed that the proposed algorithm gives better performance compared to the existing sun position algorithm (SPA) - based method as well as the fixed panel system. In terms of total output power, the proposed algorithm gives 17.96% more efficient than the fixed system and 6.38% better than the SPA-based system. Furthermore, the percentage error of the experimental measured angle to the actual sun azimuth angle was relatively minimal (less than 3%) during clear day operation. The system was proven to be effective in tracking the sun for improved energy production of solar PV panels and the proposed algorithm also can be used for designing the tracker with larger size of solar PV systems.

Concurrent Tolerance Design Based on Manufacturing Cost and Quality Loss

2014 ◽  
Vol 687-691 ◽  
pp. 4996-4999
Author(s):  
Zhang Rong
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Engineering Application ◽  
Manufacturing Cost ◽  
Tolerance Design ◽  
Quality Loss ◽  
Product Loss ◽  
Parameterized Model ◽  
The Cost ◽  
Design And Manufacture

With the constraints on manufacturing capacity, the satisfaction of product performance and the cost of manufacture are contradictory, the problem between high-performance and low-cost must be solved at the period of design and manufacture for product. To solve this problem, the product loss model has been analyzed, the parameterized and non-parameterized model of anticipant losses has been researched, with concurrent design, in connection with the product with multiple correlated assembly functional dimensions, the relation function between quality loss and process dimension tolerance has been provided, the concurrent tolerance design mathematical model based on lowest-cost and quality loss has been established. The applied case shows that this method has important guiding significance for engineering application.

There is Low Cost Titanium Componentry Today

2013 ◽  
Vol 551 ◽  
pp. 11-15 ◽  
Author(s):  
J.C. Withers ◽  
V. Shapovalov ◽  
R. Storm ◽  
R.O. Loutfy
Keyword(s):  
Mechanical Properties ◽  
Low Cost ◽  
Cost Component ◽  
Automotive Components ◽  
One Step ◽  
Near Net Shape ◽  
Mechanical Properties And Corrosion ◽  
The Cost ◽  
Processing Steps ◽  
Better Than

In spite of titanium’s excellent combinations of lightweight, mechanical properties, and corrosion resistance it has been excluded from many applications because of its high cost in fabricated componentry. The major cost to produce a titanium alloy component is the processing of the sponge into alloy plus the several processing steps for fabricating the final finished component. If low cost titanium is to become a reality, the cost of post sponge processing to final finished components must be dramatically reduced. Processing to convert sponge directly in one step to an alloyed near net shape low cost component has been demonstrated. The mechanical properties are equivalent to better than standard processed wrought titanium. Example, automotive components and other applications that confirm titanium componentry at substantially lower cost than standard processing will be provided.

Some Directions of Present and Future Computer-Managed Instruction Systems — Why the Differences?

1979 ◽  
Vol 7 (3) ◽  
pp. 209-220
Author(s):  
Stanley J. Kalisch
Keyword(s):  
Human Resources ◽  
Air Force ◽  
Cost Savings ◽  
Present Form ◽  
Florida State University ◽  
State University ◽  
Control Data ◽  
Brigham Young University ◽  
On Line ◽  
The Cost

Computer-managed instruction (CMI) systems exist in various forms. Their origins appear to be due in part to existing resources and funding. Changes to these systems have not necessarily been made with regard to existing resources, but more often with regard to cost considerations. Brigham Young University has maintained an off-line testing component within CMI. Florida State University has abandoned on-line testing. Control Data Corporation has implemented a CMI System, on-line for both authors and students via PLATO computer terminals. The Air Force Human Resources Laboratory has been employing off-line testing, but is confident that an inexpensive “microterminal” will provide adaptive testing capabilities for less than the present form of testing. The opposing directions of CMI for these organizations is partially a function of available funding, but also a function of differing views as to the cost savings technology can bring.

scholarly journals Low-Cost, Low-Energy, Wireless Hydrological Monitoring Platform: Design, Deployment, and Evaluation

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Qasem Abdelal ◽  
Ahmad Al-Hmoud
Keyword(s):  
Data Acquisition ◽  
Modular Design ◽  
Low Cost ◽  
Energy Performance ◽  
High Temporal Resolution ◽  
Local Data ◽  
Autonomous Operation ◽  
The Cost ◽  
Hydrological Monitoring ◽  
Monitoring Platform

Climate change has increasingly been considered responsible for irregular weather patterns leading to many environmental hazards and catastrophes. Coping with these conditions and providing effective solutions require monitoring and collecting data of various hydrological parameters and events in high spatial and temporal resolutions, which is generally limited by the cost and energy requirements of the monitoring devices. In this work, we push the limit of the current low-cost data acquisition capabilities by developing the HydroMon3: a hydrological monitoring platform that collects, stores, and transmits high temporal resolution data reliably and accurately, and capable of interfacing different types of sensors. The modular design is driven by utilizing the recent burst in commercially available IoT-related electronics modules to minimize the cost and maximize flexibility, while applying various hardware and software techniques to ensure reliability and energy performance. Stream stage and tipping bucket monitoring units based on the HydroMon3 platform were deployed to more than 20 locations in two different watersheds, and their performance over a 6-month season was evaluated. Collected data for a number of storms provided important insights for linking hydrological events and showed substantial variability in the monitored parameters both spatially and temporally, which were compared with local data records and confirmed that conventional hydrological data acquisition methods are under representative of the actual events. Field-proven results demonstrate the units’ ability to maintain autonomous operation from several months for the stream stage monitors to years for the rainfall gauges using of-the-shelf AA batteries.

Development of Low-Cost Anode Material for Solid Oxide Fuel Cells

2008 ◽  
Author(s):  
Sophie Menzer ◽  
Grover Coors ◽  
Dustin Beeaff ◽  
Dan Storjohann
Keyword(s):  
Low Cost ◽  
Solid Oxide ◽  
Raw Material ◽  
Cubic Phase ◽  
Manufacturing Cost ◽  
High Porosity ◽  
Oxide Fuel ◽  
Mole Percent ◽  
A Cell ◽  
The Cost

Manufacturing cost remains one of the major issues facing the solid oxide fuel cell (SOFC) industry. In the anode supported SOFC design, the cermet anode constitutes around 90% of the total material required to build a cell, making the technology very sensitive to anode raw material price. A new patent-pending process called “nickel yttria reaction-sintered zirconia (NiYRSZ)” has been developed for manufacturing SOFC anodes at a fraction of the cost. Typically, the solid component of the anode consists of about 50/50 volume percent nickel and 8 mole percent yttria stabilized zirconia, the latter being a rather costly material. It was discovered that zirconia and yttria powders sintered in the presence of nickel oxide readily form the cubic phase at moderate temperature. Cells manufactured using this process show excellent microstructures for anode supports: a strong bond between the electrolyte and the anode, and a high porosity without addition of pore formers. The strength of the anode was 100 MPa making the material equivalent or slightly superior to an anode fabricated with the traditional NiO/8YSZ material of similar porosity. The resistivity of the material was measured at 850°C and found to be less than 2 mΩ·cm. Cell performance was also compared to cells manufactured with traditional material. Every indication is that SOFC anodes fabricated with this new method perform as well as anodes made with the conventional material set.

Characterization of Rh/Si multilayer structure by HREM and HAADF

1992 ◽  
Vol 50 (1) ◽  
pp. 122-123
Author(s):  
Y. Cheng ◽  
J. Liu ◽  
M.B. Stearns ◽  
D.G. Steams
Keyword(s):  
Normal Incidence ◽  
High Resolution Electron Microscopy ◽  
X Rays ◽  
Beam Direction ◽  
Cross Sectional ◽  
Optical Elements ◽  
Resolution Electron ◽  
Point To Point ◽  
Better Than

The Rh/Si multilayer (ML) thin films are promising optical elements for soft x-rays since they have a calculated normal incidence reflectivity of ∼60% at a x-ray wavelength of ∼13 nm. However, a reflectivity of only 28% has been attained to date for ML fabricated by dc magnetron sputtering. In order to determine the cause of this degraded reflectivity the microstructure of this ML was examined on cross-sectional specimens with two high-resolution electron microscopy (HREM and HAADF) techniques.Cross-sectional specimens were made from an as-prepared ML sample and from the same ML annealed at 298 °C for 1 and 100 hours. The specimens were imaged using a JEM-4000EX TEM operating at 400 kV with a point-to-point resolution of better than 0.17 nm. The specimens were viewed along Si [110] projection of the substrate, with the (001) Si surface plane parallel to the beam direction.

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