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Heat Transfer

            
            
             The concept of transmission of heat is basic in the study of fire. This concept is also one of the most important concepts to grasp. Knowing how fire and heat travel is a way to predict what a fire is going to do and could save your life in a hazardous situation. There are three different ways that heat can be transmitted; conduction, convection and radiation. Being able to understand the three methods of heat transmission could really save your life. These methods of heat transmission are encountered on an every day basis as a firefighter, that's why it is very important to make sure you have a good idea of the characteristics of a fire. In some cases knowing the physics of a fire can help you predict what the fire is going to do. .
             Conduction is the point to point transmission of heat. Conduction occurs after a fuel has already come in direct contact with a heat source. Conduction usually occurs during the incipient or free burning phase of the fire. The concept of conduction can easily be explained by heating one end of a piece of metal and eventually the other side will heat up. This is because the heat is moving to the cooler atoms in search of being cooled down. This is an important concept because, during overhaul, if a piece of pipe that was exposed to heat on the floor below you has heated the pipe that you are working around, it could still be very hot and could burn you.
             Convection is also a very important idea to understand. Convection is basically the theory of heat rising. This method of heat transmission could be described by holding your hand over an open flame. It doesn't matter if your hand is one inch or five inches away from the flame, you can still feel the heat. The closer your hand to the fire the hotter it gets because the concentrated levels of superheated atoms is greater near the source of the fire. Understanding this theory can prevent you from making a deadly mistake on the fire ground.


Essays Related to Heat Transfer

1. The Basics of Heat Conversion

Heat Heat is the transfer of energy that results from temperature difference between two objects or systems. At molecular level, heat refers to the transfer of energy that stimulates disordered molecules. ... Transfer of heat energy is measured in calorimetric units. ... Therefore, temperature a measure of the results from heat transfer. ... Closely packed molecules have limited movement and thus do not transfer the heat they contain at a faster rate. ...

  • Word Count: 866
  • Approx Pages: 3
  • Has Bibliography
  • Grade Level: Undergraduate

2. Heat Transfer

Or the heat loss by the metal is equal to that of the heat gain by the water. Specific heat (c) is the quantity of heat (Q) per mass (m) per change in temperature (T). For water for example its specific heat is equal to 4.184 J g • °C Objective: To heat a metal and find the temp. change in water. Then find the specific heat of the metal by Qmetal = -Qwater. ... Some absorbed a great deal of heat and some absorbed very little heat form the boiling water. ...

  • Word Count: 372
  • Approx Pages: 1
  • Grade Level: High School

3. Latent Heat

Latent Heats and Specific Heat Capacity Objective: The purpose of this lab was to find specific heat capacity of a certain material and the latent heat of another by experimentation, and to compare them to already known values. ... The three calculated values for heat of fusion were used to take an average heat of fusion. ... After placing the 100-gram iron in the calorimeter, we waited for the iron to transfer its heat. ... We knew this because some steam did escape as we transferred it to the cup. ... We calculated the specific heat capacities and heat of fusion with the greatest p...

  • Word Count: 1108
  • Approx Pages: 4
  • Grade Level: High School

4. Physics Lab - Latent Heat of Fusion

Three trials were conducted using a calorimeter with water at room temperature and ice along with known values of specific heat of water and the calorimeter to determine the unknown latent heat of fusion. ... Introduction The purpose of this experiment is to determine the latent heat fusion of ice. Physics for Dummies reports that latent heat is the heat needed to cause a change in phase per kilogram.[1] The law of conservation of energy states that energy is neither created nor destroyed.[2] Instead, energy is transferred; the first Law of Thermodynamics is examined. ... Each of our water s...

  • Word Count: 1101
  • Approx Pages: 4
  • Has Bibliography
  • Grade Level: High School

5. Practice Makes Perfect and the Transfer Principle

If there is no connection the transfer is less effective. ... How is the Principle of Transfer defined? ... This is the Transfer Principle in action. ... Having trained in the heat we were prepared and not shocked by the heat in Taipei. ... The Principle of Transfer has one key part that, if missed, will negatively effect the Principle of Transfer. ...

  • Word Count: 2095
  • Approx Pages: 8
  • Has Bibliography
  • Grade Level: High School

6. Cold Temperature Induced Fracture

The third limitation is that in the heat transfer model of the previous model, only a simple buried condition is considered. ... And the heat transfer between the trapped fluid and pipe wall is over simplified. ... In this study, a more complex heat transfer model will be developed. And the natural and forced convection of the released fluid will be applied to pipe wall heat transfer condition. ... In the model, heat transfer coefficients are effectively estimated from extant literature. ...

  • Word Count: 1647
  • Approx Pages: 7
  • Has Bibliography
  • Grade Level: Undergraduate

7. Nuclear Study Guide

-Thermodynamics-branch of physics dealing with processes and laws governing the transformation of heat into other forms of energy, heatmechanical work. ... -Thermo-study of macroscopic systems-micro systems include mass, velocity, and KE-marco level includes-temp, vol, pressure, thermoconductivity, viscosity, heat capacity. ... -3 ways to change internal E-1) add or remove heat, 2) doing work on it or it doing work on something, 3) adding or removing particles that undergo reactions. ... -Particle transfer-elements can store energy as PE or KE when particles when particles transfer from o...

  • Word Count: 629
  • Approx Pages: 3
  • Grade Level: High School

8. Dryer

Dryers can be direct, indirect, or radiant-heat and continuous or batch wise. ... Heat transfer: As heat is introduced to the system, water at the surface will begin to evaporate. ... The relevant equation for heat transfer by convection is Fourier's Law: 2. Mass transfer: The liquid within the desiccant will diffuse to the surface from where it will diffuse into the hot air as a vapor. ... Heat Exchangers (5) 5. ...

  • Word Count: 1646
  • Approx Pages: 7
  • Grade Level: High School

9. Earth Sciende

Atmosphere Gas - Nitrogen (most abundant), oxygen, / carbon dioxide - has the ability to absorb heat radiated by earth, water vapor Atmosphere Pressure is in MB - Atmosphere pressure in the PPI - Atmosphere pressure at sea level - slightly more 1000 millibars, pressure decrease with altitude 3.5 miles 50% atmosphere is below 10 miles 90% atmosphere is below Atmospheric carbon dioxide is transparent to incoming Short-Wavelength solar radiation. ... Ozone -combines 3 atom oxygen (03) / concentrate between 10-50 kilometers above the stratosphere / absorbs harmful ultraviolet radiat...

  • Word Count: 518
  • Approx Pages: 2

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