Development of Automatic Sunlight Tracking System

Development of Automatic Sunlight Tracking System Creations Automatic System of Tracking for Independent Concentrators of Sunlight J.Z.Akhadov1,*, A.A.Abdurahmanov1, M.S.Payzullaxanov1, A.A.Kuchkà Ã‚ °rov1, M.A.Mamatqosimov1, I.M.Saydumarov2, F.A.Giyasova2, T.S.Saidvaliev1 Abstract The new type of the solar gauge working by means of photo diodes SV-256 is developed. Thus accuracy of management of solar concentrators reception processes heated pair for development electricity and heat, and also hydrogen in a focal zone of concentrating systems completely provides. It was shown, that the system of tracking developed by us heliostat for trajectory the Sun has high accuracy. Linear changes of the center of a stain in dynamics makes only 2 mm that corresponds 30-80 angle to seconds. Such accuracy of tracking allows carrying out high-temperature researches in a focal zone of the concentrator. Keywords SolarPower Installation, Automatic System of Tracking, Solar Energy, the Solar Independent Combined Installation 1. Mirror Concentrating Systems One of problems of creation of concentrators of sunlight this maintenance of their orientation after visible movement of the Sun. Generally the problem of orientation of mirror concentrating systems (MCS) consists in maintenance of its such spatial position at which reflected from MCS beams constantly move on the receiver (see fig. 1). Figure 1. The Basic Scheme System of Tracking of Independent Solar Installations (The Sun- The Concentrator The Receiver) 1.1. Tracking Systems Till now are practically investigated accuracy of tracking MCS by means of optical gauges, including the size tolerance zones or a dead zone, together with accuracy the tracking’s provided with optical gauges, and also as a whole is investigated dynamics of change of corners of orientation MCS (including heliostat) within day and year, especially in the presence of overcast [1]. The problem consists that such solar gauges already grows old and not where in the world is not issued such gauges. Proceeding from it we developed new systems of tracking for solar installations with accuracy 1 angle/min. Such system of tracking copes very conveniently and easily. There are the following primary goals of orientation connected with two basic operating modes of system MCS the receiver. In the first scheme the receiver is established on MCS and moves together with it the mode of direct tracking and the second scheme the receiver is not connected with MCS and is usually motionless so-called heliostat operating mode MCS/1/. The literature analysis [2-3] shows, that generally for creation of control systems by orientation (tracking systems) both on the first and on the second following data are necessary for schemes: The equation of movement of object (in this case the equation of visible movement of the Sun); A range kinematic, dynamic, mechanical and accuracy characteristics of the rotary devices depending on their constructive scheme; Actually knowledge demanded accuracy and dynamic characteristics of control system MCS. Thus tracking systems can be divided on automatic and the programs the operated. The automated control system of tracking to classify to various signs: to destination, accuracy, a scope, an action principle etc. The basic problem consists that for individual using of independent solar installations is necessary simple system of tracking of the concentrator for the sun that not knowing what automatics and the computer any person operated system. For this purpose, the automated control systems of tracking of independent solar concentrators have developed the new scheme system of tracking by means of photo diodes SV-256 (fig. 2). Figure 2. Developed the Block of Management of Orientations MCS and Developed Solar the Gauge on the Basis of Photo Diodes SV-256 For maintenance specified above functions of management by orientation MCS should include following subsystems: the solar gauge, the executive mechanism providing turns MCS and including a reducer, a drive (electric motor); a control system including the block actually of management and the converter of signals, carrying out transformation and giving of signals on intensifying and executive mechanisms. 2. Solar Gauge The primary goal which the solar gauge as it has been specified above should carry out is binding MCS and its axes of rotation to local geographical to ordinates concerning which the law of movement of object of tracking (in our case of the Sun) can be usually certain. Developed by us the solar gauge consists of 4 photo diodes which is established one plate and divided into 4 blocks. 2.1. Solar Installations The developed automatic system of tracking of concentrators about accuracy 1 angle/min. also it is conducted tests in 1500 and 5000 W them solar installations. In further the developed system will be used in parabolic cylinder the concentrator the size 10ц¦10à Ã‚ ¼ (fig.3). Figure 3. A photo of the Developed Concentrator in diameter of 6 m The offered automated control system of tracking of independent solar concentrators with the new scheme of systems of tracking by means of photo diodes SV-256 has accuracy 30-80 angle. To seconds, tests are spent to 1,5 and 5 kW solar installations. 2.2. Models The solar power plant thermal capacity 1500 W consists from heliostatsand the sunlight concentrator. Heliostat directs solar beams on the concentrator in parallel in horizontal an axis. The parabolic concentrator reflects solar beams in focus. The tracking system is necessary for maintenance in focus of the concentrator of a stable power stream of a solar energy heliostat for the sun with high accuracy. Power light exposure of a focal zone of the concentrator it is possible allows to synthesize materials, and also to receive overheated steam for reception electric and thermal energy [4]. If the receiver has rather big thermal inertia its thermal mode will be close to stationary and development of energy or converter efficiency will be defined by an average for the period arrival of energy [5]. In a dynamic mode an average for the period Ï„ value of density of energy à Ã¢â‚¬ ¢efin a focal point A on an element of surface N, equally (1) where, à Ã¢â‚¬ ¢ÃŽ ² density of a direct solar stream. With certain degree of approach the average for the period in a dynamic mode can be considered a system condition as some static condition in aim position, but with the seeming, effective parameter of accuracy heft. In effect, almost in all cases of natural research of solar power plants their power parameters resulted frequently without references to accuracy of tracking and considered as objective (that is received at exact by adjust on a source), carry actually effective (dynamic) character. On fig. 4. a, b are shown experimental works a deviation of the center of a stain from a focal point Ain working conditions of system of tracking heliostat on a day trajectory of the Sun. As shows the analysis at such accuracy of tracking heliostat on the Sun trajectory, the deviation of the center of a stain from a focal point essentially does not change (fig. 5). a) b) Figure 4. Changes of a Stain in a Focal Zone 1,5 à Ã… ¡W the Solar Furnace. Figure 5. Dependence of an Angular Deviation of a Stain on a Corner of Disclosing of The Concentrator at Various Linear Deviations 3. Conclusions Experimental and settlement works have shown that the system of tracking developed by us heliostat for trajectory the Sun has high accuracy (figs 4 and 5). Linear changes of the center of a stain in dynamics makes only 2 mm that corresponds 30 80 angle to seconds. Such accuracy of tracking allows carrying out high-temperature researches in a focal zone of the concentrator.

7-Eleven Casestudy

INTRODUCTION The ability to respond quickly to the ever-changing marketplace is paramount to the success of most businesses. The convenience-store industry is a highly competitive one and 7-Eleven’s ability to become a leader market leader appears to be based on the company’s ability to quickly respond to the rapidly changing tastes and needs of the market. 7-Eleven has not always enjoyed success, especially in the 1980s when things got really bad for the company. Helped, however, arrived in the form of Ito-Yokado (the company’s Japanese Licensee).Ito-Yokado revamped the entire retailing approach of the company by introducing an innovative approach to retailing which, along with the aid of technologically advanced systems, significantly impacted 7-Eleven’s success. ANALYSIS Ito-Yokado’s innovative approach to retailing is known as â€Å"tanpin kanri† or â€Å"item-by-item management†, a business approach that revolves around the follow ing: 1. Carefully tracking and paying attention to the fine details of the buying preferences of customers 2. Allowing the customers tastes and shopping habits to dictate the products that are carried in 7-eleven stores. -Eleven has been able to simplify the process of tracking and paying very close attention to the shopping habits of their shoppers by using the information systems installed in all of their stores. USING TECHNOLOGY TO IMPACT SUPPLY CHAIN VISIBILITY, VARIABILITY AND UNCERTAINTY Technology plays a vital role in 7-Eleven’s supply chain. The company’s state-of-the-art information systems appear to have reduced the company’s supply chain risks by increasing visibility, while reducing variability and uncertainty. Supply Chain Visibility Supply Chain visibility is the ability to access relevant supply chain information.Thanks to cutting-edge technology, like the Mobile Operations terminal or MOT, 7-Eleven knows the exact amount of individual items that are sold in each of its 5,800 North American stores on a daily basis. Another technology: the MC3000 handheld scanner lets the company collect data on items as they come off delivery trucks- increasing the company’s visibility on a real-time basis. 7-Eleven’s supply chain visibility has been greatly impacted by technology as it allows the company to better predict, with great accuracy, the number of individual SKUs that each store will sell. Supply Chain VariabilitySupply chain variability involves volatility in the flow of goods and services in a supply chain. By having the right systems in place, 7-Eleven’s supply chain variability appears to have significantly decreased. The MOT system at 7-Eleven, for example, allows stores to better forecast the number of individual SKUs, resulting in decreased storage and spoilage costs; and the elimination of potential bullwhip or snowball effects. MOT has also slashed the amount of time and labour that it takes to count inventory and to order new products, causing an improvement in company efficiency and a decrease in variability.Supply chain uncertainty Supply chain uncertainty occurs when decision makers do not know what to base their decisions on (due to a lack of proper information). 7-Eleven store managers used to color code information manually physically keep track of frozen sandwiches by their written expiration dates and would sometimes make sandwiches on the premise when instructed by corporate management. Information systems now allow stores to accurately forecast the number of stock/items that need to be replenished, resulting in significantly reduced uncertainty. THE BENEFITS OF TECHNOLOGY AT 7-ELEVENTechnology has played a crucial role in increasing 7-Elevens profitability and market share. The hundreds of millions of dollars that the company has invested in technology in the past decade appear to be paying dividends in the following ways: †¢Increased profitability: Last year, t he store reported $12. 2 billion in revenues †¢Increased share prices: Company stocks have soared above $30, since trading for less than $6 in early 2003. †¢Consecutive sales increases: The company boasts 35 consecutive quarters of same-store sales increases Technology plays a crucial role in the gathering, analyzing and distribution of information at 7-eleven.While other convenience stores chains have just gotten around to POS scanning, 7-Eleven has item-by-item information gathering systems that assist in day-to-day decision making. 7-Eleven’s retail information system or RIS provides timely sales data that enables stores to tailor their product assortments to meet the demands of their customers, reducing the risks involved in introducing new products ( due to the availability of sales data within 24 hours of a product’s introduction). The 7-exchange data system for category management, which suppliers access online, provides insights that can lead to new p roducts or product packaging.The information on this system can even alert suppliers to a potential or missed opportunity. 7-Eleven’s has opened its doors to small suppliers through its Web Vendor terminal. Suppliers who cannot afford EDI use this to communicate with the company and accept orders for very specific items like ethnic items or the self-serve espresso in a Manhattan store 7-ELEVEN’S BUSINESS STRATEGY The driving force behind 7-Eleven’s success appears to be the company’s ability to execute a Customer Intimacy strategy.Customer intimacy involves targeting specific market segments, then tailoring offerings that meet the demands of these segments. Companies that excel at this are known to: 1. combine detailed customer knowledge with operational flexibility (so they can respond quickly to fulfil the needs of their customers) 2. Continuously tailor and shape their products and services (in order to fit their customers). According to Keith Morrows, 7-Eleven’s CIO and VP of information systems, â€Å"decisions about what should be in the store are best made at the store, at the moment of truth, by people in the store, on a real-time basis†.This allows the company to shape their stores around the customer’s day-to-day habits, instead of basing company decisions on focus groups, marketing research or non-scientific guesses. Pursuing a Customer Intimacy strategy can be expensive: 7-Eleven spent $93 million on technology as the company installed new HP servers, wireless LAN, computer-based training software and new ordering system for fresh foods. Customer intimate companies, however, are willing to spend in order to build long-term customer loyalty that provides lifetime value to the company.

Apprising Employees at the San Diego Zoo

Reed Nevers Chapter 8 Case study Case study 2 November 10,2012 Online Employee performance 1. The San Diego Zoological Society finally came to the realization that they needed more from their employees even though the society was nonprofit. After further research the society decided to go with a new appraisal system to evaluate their employees. They concluded it would be an online appraisal system. The strategy behind this system was to come up with a collaboration that would coincide with the organizational goals, and give the ability of the employee to set their own goals.This idea would help prevent breakdown within the system, which allows the employees to communicate on a personal basis. This system eventually lead to a merit based platform to help pay the employees' salaries. Not only did the system reach its goals it allowed those who were slightly computer illiterate to be able to add input and it allowed the employees to record their achievements. 2. Is it worth it for the s ociety to go with an online system? There are the pros and cons.For example by changing to an online system the society will be able to streamline their efforts of recruiting, reduce paperwork, while increasing a subjective base of individuals, furthermore it allows the managers to design a process that fits their needs and ideals based upon the organization's mission. On the flipside the employees have concerns about the outcome of the sample that is generated by the software. They feel that it could be biased based upon the organizational needs instead of the employee's needs. 3.I feel that the new appraisal system will allow the employee to have the opportunity to track their performance achievements throughout the year in a simple way, this process will be beneficial to them when it comes to the annual appraisal with their managers. The managers on the other hand will have the ability to track and maintain a centralized data base of information of measures to help establish a ba seline on the employee for the annual appraisal. The online system will benefit both the employee and the manager.

Taking a Look at Gun Control - 554 Words

The government has become lazy! This is very important because if anyone is allowed to buy a gun nowhere would be safe. People would not like leaving there home because they would feel unsafe and scared. The government needs to make sure the laws are being followed, that they have proper enforcement, and think about the effects on the people if they are too leaniant with the gun control laws. Gun laws are slowly getting less strict the effects of that are being shown today, gun laws should stay the same. If the laws are less strict more criminals will be able to buy guns which is bad. If the laws are even more strict then some people might not be able to buy guns to protect themselves and their homes. The government denied 126,000 people out of the 7,831,000 people who applied for them.(Longely) This shows that the government itself is becoming more lenient with gun control. The amount of people that werent able to get guns were only â€Å"about 1.6 percent â€Å" of the total amount.(Longely) The quote shows how the government is slowly denying less and less people so they are eventually going to stop denying altogether! The government needs to make their laws on gun control stay the same as the past, not let it drop more each year. The government has failed to pay attention to the fact that many states are not following the laws around gun purchasing. If more criminal s are allowed to buy guns that could cause a lot more violence in the United States. The Associated PressShow MoreRelatedTaking a Look at Gun Control1263 Words   |  5 PagesGun control is one of the most controversial topics in our country. There are two main views. The first is the view as it is said in the United States Constitution, they guns should be legal for civilian ownership. 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