Effects of Air Flow and Heating on Temperature: Experiment

Effects of Air Flow and Heating on Temperature: Experiment OBJECTIVE: To study the Air Flow effect on Temperature changes. To study the Heating Effect on Temperature changes. To study the Effect of Air Flow and Heating on Temperature changes. INTRODUCTION: The purpose of this experiment is to investigate the effects of air flow or heating on temperature. An enclosed duct (Model LS17024) is used as assistance to complete our task. The reason of setting the entire component in enclosures is to prevent unnecessary problems during control design, air flow and effect of heating process. The enclosed duct is made up by several components which include fan, control panel, cooler section, observation door, condensing unit, and dry bulb thermocouple. Fan functions to provide air flow rate and there will be a controller installed on it in order to adjusting the spinning speed. Control panel was connected to that controller on fan as well as heater to control both variables air flow rate and the heating rate. Next, temperature is defining as one of the most important parameter because it represents the motion of particles. The air molecules gain more energy on average (move faster and bounce around more energetically) when the temperature increases as the result of high heating rate. In this experiment, the air flow and heating rate alter the temperature changes. Furthermore, heat transfer in three main ways: through radiation, conduction, and natural or forced convention. Heat transfer via radiation occurs through electromagnetic waves, an example being the sun’s energy reaching the earth with including emissivity and energy absorption. Besides that, heat can also be transferred through conduction between the inner surface and outer surface of an object. As long as it is conducted by heat energy, the heat will flow from hotter region to lower region. For example, there is only one end of iron rod being heated by candle, and sooner or later the other end of the rod will become warmer. This phenomenon is a common heat conduction example which explained the heat energy can transfer through particles in one object. Doesn’t like heat conduction, heat convection happened between particles in fluid and non-fluid. Just like we can feel the heat of the hot iron plate once we get near to it even no contact at all. It is because the parti cles in iron plate pass the heat energy to air molecules in surrounding and the air molecules carry out heat convection again from air molecules onto our sensor cells on our body. MATERIAL/APPARATUS: 1. An enclosed duct (Model LS17024) 2. Fan 3. Control panel 4. Cooler section 5. Observation door 6. Condensing unit 7. Dry bulb thermocouple EXPERIMENTAL PROCEDURE: Control State of the Duct The apparatus main power supply was switched on. The system was allowed to reach steady state whereby all readings on the instrument panel show no more changes. All the readings displayed on the digital meters were recorded in Table 1. Part A: Air Flow Effect on Temperature The axial fan was switched on. The frequency was set to 5.0Hz by adjusting the frequency inverter. The system was allowed to reach steady state whereby there were no more changes in duct temperature. All the readings displayed on the digital meters were recorded in Table 1. All the above steps were repeated with frequency of 30.0Hz. The readings were recorded down in the Table 1 for different air flow rates 5.0Hz and 30.0Hz by adjusting fan frequency. Part B: Heating Effect on Temperature The heater was switched on and the heating rate was set to 40.0Â °C. The system was allowed to reach steady state whereby no observable changes in heater and duct temperature. All the readings displayed on the digital meters were recorded in Table 1. All the above steps were repeated with heating rate of 60.0Â °C. The readings were recorded down in the Table 1 for different rates 40.0Â °C and 60.0Â °C. Part C: Effect of Air Flow and Heating on Temperature Heating rate of 31.0Â °C and a fan rate of 5.0Hz, and another set with heating rate of 31.0Â °C and fan rate of 30.0Hz were selected to study their combined effect. The system was allowed to reach steady state whereby no observable changes in the duct temperature. All the readings displayed on the digital meters were recorded in Table 1. RESULTS: DISCUSSION: The purpose of this experiment is to study the effects of heating and air flow on temperature. The more kinetic energy inside an object particles cause vigorous collision which indicates that more heat been transferred from it. For sure it gives rise in temperature. Temperature is a parameter to measure the amount of thermal energy in one object based on the kinetic action between the particles. Air is made up of molecules that are constantly in motion. Once air is being warmed up, the molecules will gain energy to increase its mobility. The molecules will then collide to each other to cause effective collision. A higher temperature indicates more thermal motion between particles. So as return, a decrease in temperature will slow the movement of particles down. Fan frequency and heating rate are two factors that will alter the temperature changes. The faster the air flow rate, the more readily the surface cools as air forming a boundary layer is replaced and the temperature measured in the area is maintained low. Heat transfer in three main ways: through radiation, conduction, and natural or forced convention. Heat transfer via radiation occurs through electromagnetic waves, an example being the sun’s energy reaching the earth with including emissivity and energy absorption. Besides that, heat can also be transferred through conduction between the inner surface and outer surface of an object. As long as it is conducted by heat energy, the heat will flow from hotter region to lower region. For example, there is only one end of iron rod being heated by candle, and sooner or later the other end of the rod will become warmer. This phenomenon is a common heat conduction example which explained the heat energy can transfer through particles in one object. Doesn’t like heat conduction, heat convection happened between particles in fluid and non-fluid. Just like we can feel the heat of the hot iron plate once we get near to it even no contact at all. It is because the particles in iron plate pass the heat energy to air molecules in surrounding and the air molecules carry out heat convection again from air molecules onto our sensor cells on our body. One of the criteria for heat transfer to occur is temperature difference. As we all know, the heat will only transfer from hotter region to cooler region. According to First Law of Thermodynamic, the heat energy transferred from cooler place to hotter place is impossible. For convection, the rate of heat loss depends on the speed of ambient air flow above the surface. There will be an insulating boundary layer of warm air forming against the surface as the object surface heats the air around it. Moving air will destroy the boundary layer, letting the new cold air in and replace the original hot air. That is why the duct temperature is getting lower as the fan frequency goes higher. There are two types of convective heat transfer which are forced convection and natural convection. Forced convection was happened when there is external force existed for example Fan is considered as external force since it provides air flow. Forced convection can transfer faster heat rate compared to nat ural convection due to the stronger air flow rate which speed up the moving air that carries the heat energy. Furthermore, the temperature increases slowly for natural convection because heat energy is transferred in natural condition. At the early state of experiment, heater and fan were switched off so that we can observe the initial reading of all temperature gauges. The duct, heater and surrounding / ambient temperature were noted as 30.0 ËÅ ¡C, 30.0 ËÅ ¡C and 30.0ËÅ ¡C respectively. This set of data is the controlled set in this experiment. In part B experiment, the fan frequency was initially set to 5Hz. The results came out for duct, ambient and heater temperature were 29.9 ËÅ ¡C, 29.9ËÅ ¡C, 30.0 ËÅ ¡C respectively. After this, we need to wait for the whole component to stabilize (cool down) before carry out next set of part A experiment. Next, the fan frequency was reset to 30Hz. The duct, ambient and heater temperature were recorded 29.8 ËÅ ¡C, 29.9 ËÅ ¡C and 30.0 ËÅ ¡C respectively. From the result, we can conclude that the duct temperature is getting low as we increase the fan frequency. This is fan has create a force convection with disrupt all the insulating boundary layer and allow the new and cooler air to come into enclosing duct. For part B experiment, the heating rate was initially set to 40 ËÅ ¡C. The duct and ambient temperature came out as 31.1 ËÅ ¡C and 30.1 ËÅ ¡C. After that we repeat the cooling down process as what we did in part B experiment for system stabilization, the heating rate was then reset to 60 ËÅ ¡C. The duct and ambient temperature were recorded as 35.5 ËÅ ¡C and 30.9 ËÅ ¡C .The readings prove that the duct temperature had rose compared to last set experiment. This is because the particles in air gained greater kinetic energy and collides with each other faster, causing an increase in temperature. In part C experiment, both fan and heater were involved. In first trial (first condition), we had the combination of 5Hz fan frequency and 31.0 ËÅ ¡C of heater temperature. The duct and ambient temperature came out as 31.0 ËÅ ¡C and 30.6 ËÅ ¡C. Again the system needed to be stabilized in order to get more accurate reading for next part. For second trial (second condition) we made the condition as 30Hz fan frequency and 31.0 ËÅ ¡C of heater temperature together. The duct and ambient temperature were recorded as 30.9 ËÅ ¡C and 30.6 ËÅ ¡C. The data proves that the duct temperature in second trial is higher than that in first trial. This is because the air flow has again destroyed the insulating boundary layer and the heating rate can’t counter with intruding of new cold air. In conclusion, there is few precaution steps need to be taken throughout the whole experiment. Firstly, the temperature should be adjusted from low temperature reading to high temperature reading so that the remained heat won’t affect the next coming set. Next, this experiment should be conducted in a closed room and located far away from heating or cooling system so that the temperature won’t be easily affected. CONCLUSION: The objective of the experiment which is to study the effects of heating and air flow on temperature was successfully determined. Air flow rate and heating rate are the main factors that affect the temperature. In this experiment, heat transferred by using convection. Fan was acting as forced convection which alters the velocity of moving air to disrupt the insulating boundary layer to allow the cool air to replace the original warm air. When heater was switched on, air is heated and expands. The molecules in warm gained greater kinetic energy and collide with each other faster, causing an increase in temperature. REFERENCES: Convection. (n.d). Retrieved March 20, 2014 from http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/heatra.html Effects of Heat and Airflow inside an Enclosure. (n.d). Retrieved March 20, 2014 from http://www2.emersonprocess.com/siteadmincenter/PM%20DeltaV%20Documents/Whitepapers/WP_Heat_Airflow_Encl.pdf Jain,R. (n.d). Heat Transfer. Retrieved March 20, 2014 from http://www.budind.com/pdf/BasicsofEnclosureCoolingWhitePaper2.pdf

Managing Change in a workplace

IntroductionManaging change in a workplace is usually instigated by any business organization so as to enhance its production purposes as well as service delivery. Therefore, change by the management necessitates a systematic planning and receptive implementation and consultation need to be carried out comprising the persons who are going to be involved by such anticipated changes. However, it should be noted change should not be forced since it may not bring the desired results to the organization.It is therefore important to initiate change measures which have to be realistic, achievable and quantifiable; such factors are significant particularly when bearing in mind individual change in management practices. Research indicates that individuals alter their ways particularly when they are persuaded to do so; therefore, for effective change to be achieved charismatic leaders should be encouraged to take up the roles of change agents in an organization. (Barbara and Jocelyne, 2006)Dis cussionFirms operate in highly uncertain environment and therefore change is inevitable in order to remain focus and prosper in there business undertakings. In the current business environment it has turn out to be more and more essential for different industries to embrace the concept of change and in particular its technology, innovation and marketing strategies so as   to sustain competitive advantage in order to prosper.Rivalry and demand in high quality goods and services has resulted to business environments to be incredibly dynamic in that it necessitates active businesses and systems to present successful reactions to such uncertain business environments by incorporating changes in such organizations in order to cope with such uncertain environments.Change is any business organization is something definite so that the industry in question can cope with new technologies and challenges that crop up with time. For instance, over the past International Business machines (IBM) was faced with high rivalry from its competitors which resulted to decrease of its market shares and thus low profitability margins.Despite the fact that, change concept is a risky business venture for any industry, research reveals that approximately 70% of new changes carried out by different industries succeed and it has proved to be vital to the success of such industries over the long run. IBM had to undergo organization changes despite the fact that it is a risky venture. IBM changed it managerial operations because of the exterior demands and forces; IBM therefore had to appraise its strategic choices so as to generate new and viable objectives that could ultimately increase the industry’s productivity levels. (Palmer and Akin, 2006)To carry out such new changes, IBM management selected the â€Å"Director image† of change to guide the firm in implementing such changes. The director was selected because the image allows the managers to go through the projected al terations by following required procedures through the cycles of suggested changes jointly with the human resources that are concerned for instance analysis of such changes, unfreezing and executing the changes.Furthermore such image of change offers the managers high control in planning the procedure of changes and also on implementing them. This ensures that the managers are in responsible of the activities and are able to ensure that the process is well followed and maintained. This ensures that the proposed changes are effectively implemented. The other advantage of this image of change is that it views results from the proposed changes as certainly achievable and thus does not leave room for doubts.In order to remain international and aggressive on the marketplace IBM had to put into practice some business improvement changes in the industry.   IBM therefore considered quality when it embarked on making changes in the business development section. IBM in the process identifie d certain new business improvement objective and then had to create a business strategy that incorporated the following approaches of development; sales improvement procedures, new product development processes, exploring new markets and structural changes.IBM also initiated improvement changes such as utilization of the concepts of e-commerce, building new and strong strategic alliances and fostered the expansion of distributions channels as well as instigating worldwide development business operations. Another aspect that IBM concentrated on in the past is that of acquiring both small and medium sized companies. IBM implemented all such internal changes in order to improve its market share as well as become a market leader in its industry and thus increase its profitability through increment in sales. (Dyer, 1984)Therefore, the business improvement changes executed by IBM Company to an enhancement in proceeds collections as its sales augmented because of improved market share. IBM Company by introducing such changes was also able to better the quality of its products to global standards as well as producing new products that met the growing needs of consumers.Procter and Gamble is another company that has embraced the concept of change and it is typical pharmaceutical business company which has profound know-how, expertise and established competences in the pharmaceutical industry. The company has effectively produced and sold a broad array of quality and new products e.g. Ziac, Enablex, Macrodantin and Asacol among other prescription products for the last twenty five years in the market.The company has consolidated or strengthen its market by gaining advantage over it’s main rivals in the market through meeting the needs of its customers, offering quality prescription products, employing competent employees, excellent management practices and through employing viable marketing strategies for example diversification thus expanding its market share.Pro cter and Gamble management have formulated business strategies that have in the process aided the company in increasing its sales. For example, the company has opted to market its products in particular segments in which it perceives to have competitive edge among its rivals rather than competing across the entire pharmaceutical market which was there initial strategy. This strategy has been enhanced by vigorous advertising campaigns by the company and the management have been able to monitor its products in the market thus they have concentrated more on those products which the customers buy frequently. (Clark and McKenny, 1995)Another change of business strategy that the company has utilized is that of utilizing the concept of technological changes brought about as a result of globalization. Since globalization has become a contemporary form of carrying out business, the concept of e-commerce has enabled the company market its products in its various markets without getting involv ed in tedious activities like traveling.For example through the internet, the company has been able to track and monitor the performance of its products in various countries and thus enabling them to make viable decisions on which markets to be done away with and which to retain. The company is also accredited with using advance marketing techniques for example over-the-counter method enhanced by the concept of internet marketing.Procter and Gamble Company have also focused on pricing strategies that have attracted many consumers of its products unlike in the past they used to focus only on quality of the products. In essence, the company’s change is that of trying to be a low cost producer in the pharmaceutical industry. Human resource being the most important asset in any organization, the employees of Procter and Gamble have also experienced new changes for instance the company has built a new motivation systemThe company has focused too on improving the welfare of its emp loyees in order to achieve good results from them. The company is also accredited with good and effective forecasting techniques for example they have utilized time series technique of extrapolating the future sales of the company’s products. Procter and Gamble too have transformed its revenues to free cash stream in front of intentions and thus they have outpaced its rivals in the market. (Maund, 2001)Despite the intense market rivalry, Procter and Gamble as a result of such changes in its operations it have diversified its products to many nations globally and in the process the management of the company has developed the best contemporary association accredited with unsurpassed competence in logical or scientific expansion and selling of its products. We can therefore deduce that the company has been successful and will continue to strive in the long-term by maintaining its overall growth regardless of the increasing outlay and the ever challenging competitive setting in t he pharmaceutical industry because of the changes they have effected. (Clark and McKenny, 1995)ConclusionHuman resource management plays a big part in achieving organizational change in order to guarantee effectiveness and efficiency in production purposes. Theoretical approaches should be applied in organizational learning in order to provide potential managers with adequate knowledge and skills on managing change. Organizational change has to be incorporated in all organizations and such changes can either be planned or unplanned depending on the state of affairs facing the organization.In this respect therefore, there is a greater requirement for this concept of organizational change because it forms the basis of success if it is put into practice well in any organization. This can be done by external or the internal change agents who are modernization agencies. These change agents have got various roles and challenges in the initiation of change in organizations. (Murray and Sch oonover, 1988)There are psychological and social psychological factors of individuals within the organization which affect individual responses to organizational change. All these have to be analyzed and managed in case they are affecting the change negatively. When they are affecting positively then they have to be enhanced. There are group and inter-group processes that are carried out in organizational change. All these issues if implemented excellently will result to the accomplishment of goals in organizations’ day to day operations. For any change to be successful the parties involved have to liaise together in order to form the whole part of anticipated changes. Therefore, change processes should be steady and ought to be sustained by facts, and statistics to support the desired change. (Timothy, 1996)ReferenceBarbara, S and Jocelyne, F. (2006): Organizational Change. 3rd Edition; Prentice HallClark, T. and McKenny, J. (1995):   Procter and Gamble- Improving consumer value through process redesign, Harvard Business School, Boston.Dyer, W, (1984): Strategies for Managing Change. Reading, Massachusetts: Addison Wesley Publishing Company, IncMaund, L. (2001): An Introduction to Human Resource Management: Theory and Practice: Macmillan, PalgraveMurray, D. and Schoonover, S. (1988): Changing Ways: A Practical Tool For Implementing Change Within Organizations. New York, New York: AMACOM, A Division of American Management Association.Timothy, G. (1996): The Human Side of Change. San Francisco, California: Jossey-Bass Inc., Publishers.Palmer, I. and Akin, G. (2006): Managing organizational change; a multiple perspectives approach, McGraw- Hill Irwin

Is It A Lifestyle, Choosing For Make A Positive Change Essay

Happiness Is a Lifestyle, Choosing to Make a Positive Change By Awnish Todi | Submitted On February 18, 2016 Recommend Article Article Comments Print Article Share this article on Facebook Share this article on Twitter Share this article on Google+ Share this article on Linkedin Share this article on StumbleUpon Share this article on Delicious Share this article on Digg Share this article on Reddit 1 Share this article on Pinterest Expert Author Awnish Todi Happiness does not depend on what you have or who you are. It solely relies on what you think! - Gautama Buddha Everyone wants to be happy. Nobody ever wants to be sad or upset or unhappy. However, despite knowing what we want, many a times happiness manages to escape us. We manage to get almost everything we desire. But this happiness remains elusive! We often use the expressions of happiness, joy and delight synonymously. This is a mistake. Happiness is very different from feeling joyful or ecstatic. It isn t really an emotion. 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Using Time Expressions and Tenses in English

Here is a quick overview of time expressions used with specific tenses including examples and explanations. Days of the Week Days of the week can be used with most tenses in English.  Notice that all days of the week are capitalized: MondayTuesdayWednesdayThursdayFridaySaturdaySunday Examples: Ill see you next Sunday.We had a meeting last Thursday.Jennifer has her programming course on Wednesday. When speaking about an action that is repeated EVERY Saturday, Monday, etc., use the day of the week, add s and use either the present simple to speak about present routines or the past simple to discuss past habits. Do not use with the continuous, perfect, or perfect continuous forms.   MondaysTuesdaysWednesdaysThursdaysFridaysSaturdaysSundays Examples:   We have our class on Tuesdays and Thursdays.  I used to play tennis on Saturdays. The Weekend British English: at the weekend OR at weekends (in general)American English: on the weekend  OR on weekends (in general) Use the present simple to speak about habits on the weekend. On the weekend is also used with the future and past ​tenses to speak about the next or last weekend. I play tennis at weekends.She visits her mother on the weekend.Were going to the beach on the weekend. (next weekend)They visited Chicago on the weekend. (last weekend) Times of the Day Use the following time expressions to express things that happen during the day. These expressions can be used with the past, present, and future forms.   in the morningin the afternoonin the eveningat night Make sure to note that we say at night NOT in the night They do the cleaning in the morning.He goes to bed late at night.Well do the homework in the evening.She had a drink in the evening before she went to bed. Time Expressions to Use With the Present Simple Use every with segments of time such as every day, month, year, every two months, etc. She travels to Las Vegas every year.Jack tries to exercise every day. Here is how to use adverbs of frequency (usually, sometimes, often, etc.): They sometimes play golf.She rarely smokes. Time Expressions to Use With the Present Continuous Use now, at the moment, right now, or today with the present continuous to speak about what is happening at the present moment. Tom is watching TV now.Im working on the Smith project today.Jane is doing her homework at the moment. Time Expressions Often Used in the Past Use last when speaking about the previous week, month or year They went on holiday last month. Use yesterday when speaking about the previous day. Use the day before yesterday to speak about two days earlier.   I visited my best friend yesterday.They had math class the day before yesterday. Use ago when speaking about X days, weeks, months, years before. NOTE: ago follows the number of days, weeks, etc. We flew to Cleveland three weeks ago.The class started twenty minutes ago.   Use in  with specific years or months with past, present, and future tenses. She graduated in 1976.Well see each other in April.   Use when with a past time clause. I played tennis every day when I was a teenager. Time Expressions Used in the Future Use next to speak about the next week, month, or year. We are going to visit our friends in Chicago next week.Ill have some time off next month.   Use tomorrow for the next day. Hell be at the meeting tomorrow. Use in X weeks, days, years time with the future continuous to express what you will be doing at a specific time in the future. We will be swimming in a crystal blue sea in two weeks time. Use by (date) form with the future perfect to express what you will have done up to that point in time. I will have finished the report by April 15. Use by the time time clause with the future perfect to express what will have happened up to a specific action in the future. She will have bought a new home by the time he arrives.