Building Management Systems Essay Example

Building Management Systems Essay A BMS consists of software and hardware; the software program, usually configured in a hierarchical manner, can be proprietary, using such protocols as C-bus, Profibus, and so on. Vendors are also producing BMSs that integrate using Internet protocols and open standards such as DeviceNet, SOAP, XML, BACnet and Modbus. A BMS is most common in a large building. Its core function is to manage the environment within the building and may control temperature, carbon dioxide levels and humidity within a building. As a core function in most BMS systems, it controls heating and cooling, manages the systems that distribute this air throughout the building (for example by operating fans or opening/closing dampers), and then locally controls the mixture of heating and cooling to achieve the desired room temperature. A secondary function sometimes is to monitor the level of human-generated CO2, mixing in outside air with waste air to increase the amount of oxygen while also minimising heat/cooling losses. Systems linked to a BMS typically represent 40% of a buildings energy usage; if lighting is included, this number approaches 70%. BMS systems are a critical component to managing energy demand. Improperly configured BMS systems are believed to account for 20% of building energy usage, or approximately 8% of total energy usage in the United States. As well as controlling the buildings internal environment, BMS systems are sometimes linked to access control (turnstiles and access doors controlling who is allowed access and egress to the building) or other security systems such as closed-circuit television (CCTV) and motion detectors. We will write a custom essay sample on Building Management Systems specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Building Management Systems specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Building Management Systems specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Fire alarm systems and elevators are also sometimes linked to a BMS, for example, if a fire is detected then the system could shut off dampers in the ventilation system to stop smoke spreading and send all the elevators to the ground floor and park them to prevent people from using them in the event of a fire. In this report it is discussed the building management system (BMS) implemented in Administration Building of Trelleborg Lanka (Pvt) Ltd. It is a distributed control system with a computerized network of electronic devices. The BMS was setup is to control, monitor and optimize building service such as Lighting, Air conditioning, Fire security, CCTV system, etc. Main objectives were as follows. ? Good control of internal comfort conditions ? Zonal control ? Increased staff productivity ? Effective monitoring and targeting of energy consumption ? Effective response to HVAC-related complaints ? Flexibility on change of building use ? Central control and monitoring of building ? Time saving ? Low operating cost ? Efficient use of building resources and services Rapid alarm indication and fault diagnosis Systems linked to the BMS represent 80% of a buildings energy usage. Fire alarm systems and elevators are also linked to the BMS, for example, if a fire is detected then the system could shut off dampers in the ventilation system to stop smoke spreading and send all the elevators to the ground floor and park them to prevent people from using them in the event of a fire. The BMS comprises: ? Power system ? Li ghting system ? Heating, Ventilation and Air-conditioning system ? Security system Fire alarm system ? Elevators etc. 2. 0 SENSOR AND ACTUATORS USED ? Temperature Transducers [pic] [pic] ? Pressure sensors [pic] [pic] ? Humidity Sensor ? Differential Pressure sensors [pic] [pic] [pic] [pic] ? Humidity Transducers [pic] [pic] [pic] [pic] ? Level sensors ? CO2 sensor ? Flow Meter ? CCTV Cameras ? Light sensors ? Occupancy sensors ? Water Pumps ? Valve actuators ? Fans 3. 0 DETAILS OF CONTROLLERS/DDC USED Inputs allow the controller to read temperatures, humidity, pressure, air flow, and other essential factors. The outputs allow the controller to send command and control signals to slave devices, and to other parts of the system. Inputs and outputs are digital or analog. The BMS is facilitated with a System/Network controller as this is a Supermarket/Office building. System controllers provide general purpose feedback loops, as well as digital circuits. System/Network controllers are applied to control more mechanical systems such as an Air Handler Unit (AHU), boiler, chiller, etc. Terminal Unit controller is used for control of lighting. |POINT SCHEDULE -BUILDING AUTOMATION SYSTEM (TRELLEBORG LANKA (PVT) LTD |   |   |   |   |   |   | | | | | |DIGITA|DIGITA|ANALOG |ANALOG| | | | | | |L |L |INPUT |OUTPUT| | | | | | |INPUT |OUTPUT| | | | | | | | |DI |DO |AI | |   |   |   |   |   |   |   | |   |   |   |   |   |   |   | |   |   |   |   |   |   |   | |   |   |   |   |   |   |   | | | | | | | | | [pic] 4. 0 SOFTWARE, GUI AND COMM UNICATION PROTOCOLS USED Open protocols were used. ? DeviceNet ? XML ? simple graphical interface 5. 0 DRAWBACKS OF THE SYSTEM ? Confusion is higher about responsibility of errors and faulty point identification when things go wrong since the open protocols were used. ? More than one points of contacts for any problem with BMS. ? Software and hardware was provided by different manufactures according to the requirements indicated in the point schedule. 6. 0 DISCUSSION The BMS implemented in Administration Building of Trelleborg Lanka (Pvt) Ltd comprises above mentioned mechanical and electrical services in order to provide the facilities necessary for maintaining a comfortable working environment. Basic controls took the form of manual switching, time clocks or temperature switches that provide the on and off signals for enabling pumps, fans or valves etc. The purpose of the Building Management System (BMS) was to automate and take control of these operations in the most efficient way possible for the occupiers, within the constraints of the installed plant. The BMS is a â€Å"stand alone† computer system that calculates the pre-set requirements of the building and control the connected plant to meet those needs. Its inputs, such as temperature sensors and outputs, such as on/off signals are connected into outstations around the building. Programmes within these outstations use this information to decide the necessary level of applied control. The level of control via the BMS is dependent upon the information received from its sensors and the way in which its programmes tell it to respond to that information. As well as offering a precise degree of control to its environment, it can be made to alarm on conditions that can’t meet specification or warn of individual items of plant failure. Occupancy times for different areas are programmed into the Building Management System such that the plant is brought on and off to meet the occupier requirements. These times are often under optimum start control. This means that the chilled water pumps, AHU, etc are enabled, at a varying predetermined time, to ensure that the cooled space is at the set desired temperature for the start of the day. The Building Automation System therefore, based on the outside air temperature the space temperature and the building structure, determines the AC plant start time. Occupied, Unoccupied are the two operating modes for the building automation system. Occupancy is usually based on time of day schedules. In Occupancy mode, the BMS aims to provide a comfortable climate and adequate lighting, often with zone-based control so that users on one side of a building have a different thermostat than users on the opposite side. A temperature sensor in the zone provides feedback to the controller, so it can deliver cooling as needed. Lighting can be turned on and off with the building automation system based on time of day by occupancy sensors and timers. One typical example is to turn the lights in a space on for a half hour since the last motion was sensed. A photocell placed outside a building can sense darkness, and the time of day, and modulate lights in outer offices and the parking lot. Air handlers mix return and outside air so less temperature change is needed. This can save money by using less chilled water. Some external air is needed to keep the buildings air healthy. Analog temperature sensors have been placed in the space, the return and supply air ducts. Actuators are placed on chilled water valves, the outside air and return air dampers. The supply fan is started and stopped based on temperatures and building pressures combination. The constant volume air handling unit, are used. CAVs open and close dampers and water-supply valves to maintain temperatures in the buildings spaces. They cool the spaces by opening or closing chilled water valves that feed their internal heat exchangers. Generally one CAV serves several spaces. Chilled water is used to cool a buildings air and equipment. The chilled water system has two chillers and pumps. Analog temperature sensors measure the chilled water supply and return lines. The chillers are sequenced on and off to chill the chilled water supply. Two cooling towers and pumps are used to supply cool condenser water to the chillers. The condenser water supply to the chillers has to be constant so, speed drives are used on the cooling tower fans to control temperature. Proper cooling tower temperature assures the proper refrigerant head pressure in the chiller. Analog temperature sensors measure the condenser water supply and return lines. The building automation system has alarm capabilities. If an alarm is detected, it is programmed to notify someone. Notification is through a computer and audible alarm. Fire and smoke alarm systems are hard-wired to override building automation. The hot water system supplies heat to hot water heating coils. The hot water system has a boiler and pumps. Analog temperature sensors are placed in the hot water supply. The boiler and pumps are sequenced on and off to maintain supply. Name : A. P. W. Jayasekara(09/8660) P. G. C. Karunathilake(09/8663) W. M. A. S. Wijethunga(09/8678) T. N. Walpita(09/8676) Course : MSc in Electrical Engineering-Department of Electrical Engineering, University Of Moratuwa. Lec. By : Prof. Lanka Udawatta. Date : 2010-08-14 ASSIGNMENT Building Management System – EE5118

Essay Sample on Sports Celebrity Advertising

Essay Sample on Sports Celebrity Advertising Advertisers often spend heavy amount of dollars yearly on celebrity endorsers, with the aim of pressuring consumers insights and purchase objectives.  Ã‚   Celebrities around the world prepare advertisements believable and aid in the recognition of brands, increase message, generate a constructive attitude on the way to the product and construct a separate character for the authorized brand.  Ã‚   Eventually, celebrities backing are supposed to cause a greater chance of customers preferring the endorsed item, and memorandums conveyed by eminent personalities reach a high scale of interest and recall for various customers.  Ã‚   The impact of the proclamations of celebrity endorsement agreements on stock income is encouraging and urged that personality endorsement deals are usually viewed as a meaningful savings in marketing.   Providing this fact, one can securely deviate that personality endorsements are here to live. The escalating use of celebrity supporters, on the other hand, has produced an additional fact, that of using a celebrity in several promotion movements to support various items. The perfect numerous product promoter is Michael Jordan who, has approved products for about 14 corporations.  Ã‚   Jordan was called the wealthiest sportsperson for 1997 by Forbes publication, with mainly of his earnings, $47 million from product exposures.  Ã‚   The number of publicities to the celebrity has an impression on behaviour toward the commercial and purchase objectives, even though the amount of products backed by the star and the amount of disclosures to the celebrity drive separately on customers’ manners. There are, nevertheless, a number of questions concerning product approvals that hang about unanswered and deserve consideration. The aim in this research is to work up the study on several product approvals. This is predominantly imperative, given the prevalence of ads characterizing celebrities, particularly from the world of games; the ruining of the representation of sports celebrities as a result of current public cases relating recognized sports stars for example, Allen Iverson, Mike Tyson, Latrell Sprewell, and the substantial advertising finances that are generally assigned to this venture. I will start by presenting a comprehensive survey on celebrity endorsements and by discovering appropriate theories. I will then focus my assumptions to experimental analysis. Furthermore I will present the effects and examine their inferences for marketing executives and examiners in advertising, as well as try considering possible upcoming research trends. This study observes whether customers understand that celebrity endorsers are fond of the commodities they approve, and presents a form using these and other features of the endorser to foresee thoughts toward the endorsed creation.   Way of feelings towards the advertisement the endorser and the good were also considered. The model specified that product attitudes were forecasted by conjectures about the endorsers liking for the creation and by approaches toward the one who endorse. This research was performed at university and Harrow town centre of UK using a variety of searching techniques incorporating focus crowds and an analysis of males whose ages were between 18 to 24 years. It was intended to address a chain of research queries associated to the connection between 18-24 years young men and icon-person advertisement.

World war one BOOK REVIEW Essay Example | Topics and Well Written Essays - 750 words

World war one BOOK REVIEW - Essay Example Despite the economic focus of the book, it is written in a surprisingly easy to read style, and offers a deep thoughtful insight into the economic underpinning of the peace established in the aftermath of World War I. The book consists of several chapters describing the situation in Europe before and after the war, the peace conference and the Treaty, reparations, and remedial actions suggested by the author. One of the key points emphasized by Keynes throughout the book is the need for a non-vindictive peace treaty. The essence of this suggestion is that the victorious Allied states should minimize the burden of reparations and repayments borne by Germany. Keynes believes that settlement of frontiers and confiscation of property owned by the German governments would be a better solution because huge reparations envisaged by the Peace Treaty would discourage German domestic production and entrepreneurship. The result would be production of only subsistence minimum and eventual economic failure of Germany and its inability to pay the imposed reparations. Keynes claims that the negotiating parties were predominantly concerned by the political aspects of future peace and had almost no vision of the economic outcomes of the peace. The Big Three leaders balanced between the long-term political benefits of their countries, varying interests of their partners, and the public opinions of their nations. Thus, French Prime Minister Clemenceau perceived Germany as a potential threat to stability and peace in Europe, and a threat to security of his country. Therefore, France tried to make economic conditions of the Treaty as harsh as possible for Germany arguing that light economic penalties would result in rapid recovering and further strengthening of Germany. Keynes' position can probably be explained by the interest of his own country that was extremely concerned with the revival and further development of international trade which constituted the cornerstone of the country's economic potency. Lloyd George understood that Germany ruined by excessively hard economic claims of France and other Allies would seriously undermine marketability of British goods in the European market. The British representatives also viewed Germany as a potential barrier against Russia and reasonably considered that only country with healthy economy tied by strongly trade-based relationships could effectively fulfil such mission. No wonder Keynes labels Versailles as 'the triumph of political passion over economic reason' (p.16). Bringing forth a number of serious arguments, Keynes also predicts impoverishment of Central Europe and growth of radical nationalism. He brilliantly predicted not only failure of Germany to pay the imposed reparations, but also the process of hyperinflation that occurred in Germany after the war and the political victory of reactionist parties in the country. The prediction made by the author relies on comprehensive analysis of Germany's exports, imports, and other aspects of economic life.On the other hand, the death of millions Germans from starvation also predicted by Keynes never occurred. The list of remedies suggest by Keynes to avoid or mitigate the negative

English Composition Coursework Example | Topics and Well Written Essays - 250 words - 1

English Composition - Coursework Example On the other, human memory differs from computer memory. The computer memory requires hardware and software in order for information processing to take place. Human memory does not require any hardware or software. The computer memory stores information in a hard disk which can be affected by virus and have all information corrupted. The human brain is not affected, and it is difficulty to have the information stored in the human brain erased (Ullman, 2003). From the ideas generated from different texts and construction of outlines, it is simple to write a standard thesis. I will utilise the use of different information from different authors to come up with constructive ideas about the problem of study (Gundersheimer, 2011). I will also use the texts to contract a literature review which will help readers to understand other author’s ideas about the problem or study. From the material research, I will emerge with a conclusion of the thesis (Turkle,

Learning Preferences Essay Example for Free

Learning Preferences Essay Describe your strongest dimension on the personality spectrum. My strongest dimension on the personality spectrum is a giver (32). Every word on the list of giver describes me. My honesty is probably one my strongest. As I get older and being the mother of two terrific boys, I just feel at this exact moment in my life there is no need to lie. Honesty is the key, but sometimes I feel I am a little too honest and may hurt someone’s feelings, but not intentionally. I just feel â€Å"it is what it is†. I love promoting peace whether it’s a world issue or family. I just think that everyone would be a lot happier in their lives if we can be honest with one another and promote positivity. I hate drama. 2. Describe how each practice activity reinforced or contradicted something about yourself. In the Personality Spectrum Assessment it contradicted me on being a visual learner. In the Multiple Pathways to Learning Assessment it resulted in me being under-developed, but in one of the activities in the Personality Spectrum it said that I was fine in this area. I must say it left me a little baffled, but at the same time I feel my answers can vary to certain situations that can me contradict myself in this case. I feel that I can adapt to different learning environments quite well, just like I’m learning the OLS. This is definitely an contradiction. The Barsch Learning Style Inventory activity made me realize that I am more proficient in the kinesthetic learning style than I am a visual learner. This activity made me think hard and deep about what my learning abilities are and what I thought they were. I definitely love working hands on and encouraging others. I am usually the one that normally starts dishing out ideas first when I am grouped up with others. .

Successes and Failures of Signals Intelligence :: essays research papers

SUCCESSES AND FAILURES OF SIGNALS INTELLIGENCE The United States must be prepared to deploy against sophisticated and unsophisticated adversaries on a moments notice. The enemy may have little concern for the Hague Convention, which seek to limit collateral damage and noncombatant casualties. Signal Intelligence provides foreign data that analysts can collect, process and analyze into intelligence information. Whoever has the ability to control and exploit the electromagnetic spectrum, which ranges from zero to infinity, will know their enemies vulnerabilities, create opportunities, achieve tactical surprise, and result in mission accomplishment. Considerations such as successful and unsuccessful collection in Signal Intelligence will be a tremendous factor in planning and the execution of U.S. military operations.   Ã‚  Ã‚  Ã‚  Ã‚   There are numerous accounts of the successful gathering of Signal Intelligence that prove to be of use. The rapid advancements in microelectronic technology forces the government to design and manufacture sophisticated new radars, airborne reconnaissance, and surveillance platforms; they offer superior capabilities over previously employed systems. Having accredited systems and networks, in accordance with Department of Defense guidance, will ensure that units are within regulations while collecting signals. To obtain the most beneficial information, analysts need to be properly trained in the latest and greatest data sets. Staffing 100% qualified personnel in strategic locations will lead to optimal performance in signals analysis; commanders should provide the capability of target redundancy with different forms to ensure that collection requirements are met. Lastly, understanding commander’s intent and the focus of effort are critical ingredients for su ccess. Despite the factors that lead to success, there are just as many failures, which need to be discussed. Failures are the temporary or possible permanent annihilation of the ability of a mechanism to perform its required purpose. The number one failure in signal intelligences is bureaucracy. All of the policies, guidelines, rules, procedures, course of actions, and laws, create so much red tape, that signal analysts cannot do their jobs, which is to collect, process, or analyze foreign intelligence information. Once the analyst work through the political rubbish, the opportunity for collecting Signal Intelligence may have disappeared. Units that try to use lethargic and robust radars against state of the art Electronic Security will provide marginal data if any; the Electronic Security provides firewalls, secure logins, and offers protection resulting from measures that are designed to deny unauthorized persons access to information. Some radars have the ability to use passive tracking , which means that there is no target illumination by the tracking system.

Discuss the Role Central Banks Have Played in Counteracting

Discuss the role central banks (e. g. Fed, Bank of England) have played in counteracting the effects of the financial crisis. Argue how the monetary policy mandate might change in the future to avoid such crises. As stated by Buiter (2008) the Central Bank has three main tasks. These are; ‘(1) the pursuit of macroeconomic stability; (2) maintaining financial stability and (3) ensuring the proper functioning of the ‘plumbing’ of a monetary economy'.The effectiveness of the Central Bank, during the financial crisis, will be discussed as well as how the Central Bank could change its monetary policies in order to avoid such a crisis in the future. The main focus will be on the Bank of England (BoE), the European Central Bank (ECB) and the Federal Reserve System (Fed). Each of the Central Banks have different objectives when it comes to monetary policy. The BoE concentrates on the target inflation set by the Chancellor of the Exchequer, which is 2 percent. The ECB has a similar objective although they can set target inflation themselves and it is usually just under 2 percent.The Fed on the other hand has two main aims; ‘maximum employment, stable prices' (Buiter 2008). When the crisis hit, the Central Banks made some attempts to counteract it. Firstly, they broadened their role as a lender of last resort. They started to include ‘liquidity support to non-deposit-taking institutions' (Blanchard, 2010). This allowed them to intervene either directly or indirectly with more companies. This occurred at the start of the crisis where overnight interest rates rose sharply in Europe leading to the ECB responding with a liquidity injection of ‘â‚ ¬94. 8 billion worth of overnight repos' (Cecchetti, 2008).The Central Banks went on to drop interest rates. The aim of this was to allow banks to receive short-term funding at lower interest rates as well as reducing the demand for inter-bank loans (Cecchetti 2008). The hope was that lower in terest rates would also encourage spending in the economy. However, This did not solve the problem. This is why the Fed decided to adopt a new policy where they introduced the Term Auction Facility (TAF). In America the Government debt was continuing to decline and there was a worry that the Federal Reserve would have to change their balance sheet management.The TAF allowed banks to bid for reserves at interest rates ‘below the primary lending rate available at the time' (Cecchetti 2008). The aim of this was to alleviate pressures in the long-term funding markets. This policy was also adopted by the ECB and BoE. A major problem which affected Central Banks in the North Atlantic region was that they made mistakes because they had not anticipated a financial crisis (Buiter 2008). The Fed cut its interest rates excessively due to political pressures and financial sector concerns.This over-reaction of the Fed was partly due to the fact that they are the least independent of the th ree central banks and, as a result, felt political and financial sector pressures leading to the over-reaction. If the Fed were to become more independent then such an over-reaction might not occur. One option for Central Banks is to take into account the exchange rate. During the financial crisis the exchange rate was extremely volatile, due to large shifts in cash flows, which lead to ‘large disruptions in activity' (Blanchard, 2010).These large fluctuations cause balance sheets of companies to become unpredictable and can damage the trade sector leading to the financial sector becoming more unstable. These fluctuations might be minimized if the Central Banks took exchange rates into consideration as well as the inflation rate when determining monetary policies. Exchange rates can, however, not become too stable as this can create ‘greater incentives for contract dollarization' (Blanchard, 2010). The financial crisis has shown that the zero bound nominal interest rates can cause huge problems.Hence, it can be argued that target inflation rate could be increased. If the inflation rate were to be increased to 4 percent for example, then this would allow them to lower nominal interest rates to zero and then the real interest rate could be lowered to as low as negative 4 percent . Conventional monetary policy could then ease monetary policy by more than it could with a lower inflation target (Mishkin 2011). However, raising the inflation rate could cause problems. It has been found that the economy remains stable if inflation rates are below 3 percent.Once the inflation rate is above this level people start to believe that the price level is not a credible goal for the Central Bank any more. This has occurred before in the United States leading the the great inflation in the 1970s (Mashkin 2011). Lastly Central Banks could use a price level target instead of the inflation target they use at the moment. Price level targeting has a major benefit which is that it is an automatic stabilizer. If demand where to drop this would cause a lower price level which would ead to the monetary policy raising the price level back to its target. This would cause a rise in inflation in the short run which would lower interest rates which would stimulate aggregate demand. There are, however, some problems when using price level targeting to determine monetary policy. Price level targeting can cause larger fluctuations in output as well as being harder to communicate to the public. The price level target would constantly be changing which is harder to explain the inflation target which remains constant.In conclusion it I have discussed how the Central Banks have tried to counteract the financial crisis. I have found that as well as coming up with innovative ideas such as the TAF to try to counteract the crisis, they have also made mistakes. There have also been some ideas as to how to change monetary policy, Such as price level targeting and raisi ng the inflation rate, in order to prevent such a crisis in the future. References: Blanchard, O. , Dell’Aricca, G. , Mauro, P. (2010), â€Å"Rethinking Macroeconomic Policy†, IMF Staff Position Note, http://www. mf. org/external/pubs/ft/spn/2010/spn1003. pdf Cecchetti, S. (2009), â€Å"Monetary Policy and the Financial Crisis of 2007-2008†, mimeo, http://fmwww. bc. edu/ec-j/Sems2008/Cecchetti. pdf Buiter, W. (2008), â€Å"Central banks and financial crises†, discussion paper series, http://eprints. lse. ac. uk/24438/1/dp619. pdf Mishkin, F. (2011), â€Å"Monetary Policy Strategy: Lessons from the Financial Crisis†, NBER Working Papers, https://mms. st-andrews. ac. uk/mms/module/2011_2/S2/EC2008/Content/Mishkin%20%282011%29%3A%20Monetary%20Policy%20Strategy/Mishkin2011. pdf