PPT-Heat Transfer

Types of Heat Exchangers l 1 Double Pipe Heat Exchangers Hair pin Return bend wc p t 1 wc p t 2 WC p T 1 WC p T 2 ID O D D J w   W   Qw c p t 2. Analogies. Heat .  Mass  . (sometimes). Momentum. Analogies are useful tools. An aid to understand transfer phenomena. A sound means . t. o predict behavior of systems for which limited quantitative data are available. Heat Transfer . is the transport of . thermal energy. due to a temperature difference across a . medium(s. ). mediums: gas, liquid, solid, liquid-gas, solid-gas, solid-liquid, solid-solid, etc.. Thermal Energy. Lesson . 5. : Lagging. Aim. LO1: Understanding Heat Transfer Rates for Composite Systems.. Critical Thickness. of Insulation. Let’s consider a layer of insulation which might be installed around a circular pipe.. Introduction. 1,2. : . There . is a continuing need to design better . cooling . devices for electronics components because of increasing power and also . miniaturized . sizes. Heat pipes have been proven to be among the most efficient passive cooling solutions for . LO3.1: Lesson . 1. : . . Type of Heat Exchangers (. Recuperators. ). Aim. LO3: To be able to Evaluate Heat Transfer Equipment.. Learning Outcomes. At the end of this session the students will be able to…. Introduction. M. ethods. Measured Variables: inlet/outlet temperatures, heat transfer area, flow rates. Figure 1: . Condensers studied in experiment. Cold Stream Flow Rates (. m. 3. /s). :. 9.58∙10. DESCRIBE the process that occurs in the following regions of the boiling heat transfer curve:. a. Nucleate boiling. b. Partial film boiling. c. Film boiling. d. Departure from nucleate boiling (DNB). How does heat energy get from the Sun to the Earth?. There are no particles between the Sun and the Earth so it CANNOT travel by conduction or by convection. . ?. RADIATION. How can we relate our new understanding to the greenhouse effect?. To Make Foldable:. 1. On the short side of the paper, fold it down an inch.. 2. Now fold it in half, hamburger style.. 3. Now fold it in 1/3.. Conduction. Convection . Radiation. Heat Transfer. Examples. CERT Educational Series. Greg Monty PhD, Vicki Foust PhD, and Elizabeth . Keele. . M.Ed. Chamber with conductive wall. Calorimeter. Measures . amount of heat involved in a chemical . reaction or physical change. “L JJAM” aka “Dream Team” aka Team 3. CHBE446 02/02/18. HOT HOT HOT! . Background Theory. Conduction. Convection. Heat Exchangers. Photo Cred: Meghan. Heat Transfer. The physical process in which thermal energy is transferred from one object to another as a result of a temperature difference. Why is it windy at the seaside?. Cold air sinks. Where is the freezer compartment put in a fridge?. Freezer compartment. It is put at the top, because cool air sinks, so it cools the food on the way down.. . Eng. . Abdelrhman Essam. Free convection and Radiation. Convection . Convection Heat transfer can be classified into;. 1- forced convection . 2- free convection.. Introduction to free convection. presence of bulk fluid motion and by conduction in the absence of it. Therefore,. conduction in a fluid can be viewed as the limiting case of convection, corresponding to the case of quiescent fluid (Fig. 6–1)..