Heat Essays

  • Importance Of Heat Pipe

    5386 Words  | 22 Pages

    The heat pipe is a highly effective passive device for transmitting heat at high rates [1]. It can transfer heat over considerable distances with extremely small temperature drops, that is minimum loss in heat during transfer. A heat pipe has exceptional flexibility and has simple construction with easy control, without the need of external pumping power. The component of conventional heat pipe has been shown in Figure 1. Figure 1: Working principle of heat pipe (copy from Electronics Cooling Magazine)

  • Heat Pipe Limitations

    3560 Words  | 15 Pages

    important heat pipe design consideration is the amount of power the heat pipe is capable of transferring. Heat pipes can be designed to carry a few watts or several kilowatts, depending on the application. Heat pipes can transfer much higher powers for a given temperature gradient than even the best metallic conductors. The maximum heat transport capability of the heat pipe is governed by several limiting factors which must be addressed when designing a heat pipe. There are five primary heat pipe heat

  • Importance Of Heat Welding

    1744 Words  | 7 Pages

    Heat Flux for Welding Processes: Model for Laser Weld Suresh Akella1, Harinadh Vemanaboina1, Ramesh Kumar Buddu2 1Sreyas Institute of Engineering & Technology, Hyderabad-500068 2FRMDC Division, Institute for Plasma Research, Bhat, Gandhinagar-382428. E-mail:s4akella@gmail.com Abstract-An accurate and physically suitable heat flux model is required to represent the welding process. Experimentally established processes are used in literature. A well established model in heat flux representation

  • Countercurrent Heat Exchanger

    4904 Words  | 20 Pages

    In cross flow type of heat exchangers, the fluids flow in directions normal to each other. Cross flow heat exchangers made in aluminum are common as radiators in vehicles. A vehicle needs more power and space for comfort purpose. So, a countercurrent heat exchanger (HEX) is need to be shifted. It may be shift on the roof of the vehicle compartment. That’s why, a new material, graphite foam with high thermal conductivity and low density, is a potential material for HEXs in vehicles. To increase

  • Essay On Thermal Heat

    859 Words  | 4 Pages

    Choice of Materials is among the prime strategy used to achieve level of coziness in tropical region, light materials with low thermal storage capacity and high insulation characteristic are well matched to totally absorb and release heat, such as wood. It is also significant to have the understanding of materials behavior when exposed to high humidity, as it is necessary to prevent wear of the materials used, especially those in direct contact with the weather condition and ground. (APA style).

  • Specific Heat Experiment

    819 Words  | 4 Pages

    Specific Heats of certain different solids through the method of using mixtures. The experiment was conducted was focused mainly on how the specific heat was to be determined through the observation of the transfer of energy from one substance to the other. The data were gathered through the measurement of the temperature using a thermometer and through the use of a calorimeter to minimize unwanted loss of heat energy. Results from the experiment were used to verify the theory wherein heat energy is

  • Heat Exchanger

    1817 Words  | 8 Pages

    Heat Exchanger is a device that is used to transfer thermal energy between two fluids or more fluids , between a solid surface and a fluid, or between solid particulates and a fluid, at different temperatures and in thermal contact. In heat exchangers, there are usually no external heat and work interactions. Typical applications involve heating or cooling of a fluid stream of concern and evaporation or condensation of single or multi component fluid streams. In other applications, the objective

  • Advantages And Disadvantages Of Heat Insulators

    1140 Words  | 5 Pages

    The substances which do not allow the heat energy to flow through them easily are called bad conductors of heat or heat insulators. ' From the term 'heat insulator ' we do not mean that heat energy does not flow through them. Actually heat energy flows, through them, but at a very small rate as compared to good conductors. Glass, mica, ebonite, cotton, wool, asbestos, polyurethane foam (commonly known as PUF), wood, 'plastics are bad conductors of heat, In addition to it, all liquids (except

  • Heat Pipe Heat Exchanger Literature Review

    1758 Words  | 8 Pages

    Chapter (2) Literature Review 2.1 Introduction Presently, heat pipe heat exchangers have many applications in space industries, electronics, etc. One of their important applications is in Heating, Ventilation and Air conditioning (HVAC) systems. The aim of HVAC systems is to prepare a desirable ambient air with suitable temperature, humidity, freshness and velocity. The optimal values of these variables are varied depending on the objective of air conditioning. For example, comfort conditions

  • Essay On Heat Transfer

    968 Words  | 4 Pages

    HEAT TRANSFER Heat is an exchange of thermal energy. Its molecules have absorbed energy, when a substance gets hot, which causes the molecules to vibrate rapidly, expand and bounce off one another. As the molecules move, they collide with nearby molecules, causing a exchange of thermal energy. The faster the molecules within a substance move, the higher its temperature. This is true no matter the substance is water, air, a sirloin steak or an aluminum pot. Thermal energy may be exchanged to foods

  • Modes Of Heat Transfer

    776 Words  | 4 Pages

    net effect is a transport of energy and it takes place in the direction of lower temperature gradient and named as heat transfer by convection. Hence, there are mainly three modes of heat transfer e.g. conduction, convention and radiation. Fourier noticed that the quantity of heat (q) transferred through unit area in unit time is directly proportional to difference of temperatures between the layers and inversely proportional to distance h between them is given by q=ĸ ((T_1-T_2 ))/h,

  • Heat Pipe Lab Report

    1151 Words  | 5 Pages

    INTRODUCTION A heat pipe is a simple mechanism which is use to transfer heat from one point to another point.. It is also referred as the "superconductors" of heat because heat pipe is having extra-ordinary heat transfer capacity and heat transfer from one location to other having rate with no heat loss. Heat pipe was first introduced by R.s.Gagler in 1943.When it is invented that its excellent properties were appreciated and than after a development of heat pipe is started. In heat pipe design, there

  • Heat Engine Research Paper

    2724 Words  | 11 Pages

    HEAT, WORK AND EFFICIENCY Thermodynamics, from the Greek word thermos, meaning heat and dynamikos, meaning power, deals with the form of energy and its transformation to do mechanical work. It also explains how is work related to heat and what does heat do with the object. During the energy-work transformation, a machine is needed, as a device or converter, to obtain work output, however, machines are never 100-percent efficient. This chapter tackles, Thermodynamics, which describes

  • Heat Conduction Lab Report

    781 Words  | 4 Pages

    cylinder), the heat conduction process will only happen when there is vibrational motion of the molecule. The molecule inside the copper metal is found in lattice structure. So, when heat energy is supplied on it, the molecules will gain kinetic energy and hence begin to vibrate.The molecules which are in fast-moving of the warmer part of copper metal will collide with the slower moving molecules of the cooler region. Once the collision is happened, the cooler molecule will gain some heat energy and

  • Heat Transfer Theory

    917 Words  | 4 Pages

    1. introduction : Heat transfer: Heat transfer is the science that attempt to estimate the energy transfer that may take place between material bodies as a result of a temperature difference. Thermodynamics explains that this energy transfer is defined as heat. The science of heat transfer attempt to not only to explain how heat energy may be transferred, but also to estimate the rate at which the exchange will take place under certain specified conditions. The fact that a heat-transfer rate is

  • Heat Exchanger Design

    1044 Words  | 5 Pages

    Heat exchanger is a device which provides a flow of thermal energy between two or more fluids at different temperatures. There are many problems created in the segmental heat exchanger during and after the work. The major causes of this problem is the geometry of heat exchanger, type of fluid used, type of material etc., The purpose of this work is to design the shell and tube heat exchanger which is one among the majority type of liquid –to –liquid heat exchanger. Since the important design parameters

  • Heat Transfer Analysis In A Double Pipe Heat Exchanger

    944 Words  | 4 Pages

    This paper deals with the heat transfer analysis in a double pipe heat exchanger with longitudinal fins. The double pipe heat exchanger consist of inner circular pipe made of copper for better heat transfer rate with longitudinal fins made of copper for providing larger surface area for heat transfer and outer circular pipe. The experimental analysis is carried out with both parallel flow and counter flow and a comparative study is being done with both the types of flow using longitudinal fins and

  • Dry Heat Sterilisation Experiment

    772 Words  | 4 Pages

    technique is dry-heat sterilisation. Dry heat sterilisation takes a long time and is done at a high temperature of about 160°C for 60 minutes. In dry-heat sterilisation, there is two parts which are heating and flaming. Heating is when the inoculating loop and the needle are burned in the direct flame until it turns red in colour while flaming is just passing the forceps and mouth of the culture tubes through the flame to prevent bacteria from entering. The second technique is moist heat sterilisation

  • Heat Exchanger Experiment

    1710 Words  | 7 Pages

    Abstract The function of a heat exchanger is to transfer heat between a solid object and a fluid, or between two or more fluids. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. They are used in space heating, refrigeration, air conditioning, power stations, chemical plants, petrochemical plants, petroleum refineries, natural-gas processing, and sewage treatment. The classic example of a heat exchanger is found in an internal combustion engine in which

  • Essay On Heat Exchanger

    1832 Words  | 8 Pages

    INTRODUCTION For the exchange of the heat unit which is used is known as the heat exchanger. The heat exchanger is used for the transformation of the energy in the form of heat from one fluid to another fluid. Heat exchanger works on the well- known principle of the chemical science and it is Calorimetry Principle. Whose function is to transform the heat from one fluid or solid to another one till that time when the temperature of both the parts become equal. In the heat exchanger the working fluid is