document The Latent Heat Quiz
... Latent heat is the term used to describe the quantity of heat either absorbed
or _____________by a substance as it changes ______.
Melting and _______________ are processes that require heat to be added.
__________ and condensing are processes that release heat.
cfd investigation of helical coil heat exchanger abstract
... applications including power plants, nuclear reactors, refrigeration and airconditioning systems, heat recovery systems, chemical processing and food
industries. Helical coil configuration is very effective for heat exchangers and
chemical reactors because they can accommodate a large heat transfer ...
Heat Transfer Comparison in Coaxial Tube in Tube Heat Exchanger
Due to hazardous environmental impact of the CFC and HCFC refrigerants that
are currently used in R&AC systems, in accordance with the Montreal Protocol, actual is
exchange of those by new, ecologically acceptable, HFC refrigerants. Therefore system
performance analyses was made where the s ...
6–18 A steam power plant receives heat from a furnace at a rate of
... rate of 280 GJ/h. Heat losses to the surrounding air from the
steam as it passes through the pipes and other components are
estimated to be about 8 GJ/h. If the waste heat is transferred
to the cooling water at a rate of 145 GJ/h, determine
(a) net power output and (b) the thermal efficiency of this ...
... structural units of chemical substances is called chemical potential energy. The study of heat
transfer during chemical reactions and changes of state is called thermochemistry. One of the units
used to measure heat flow is the calories defined as the amount of heat needed to raise 1 g of water 1oC. ...
... Heat energy can pass through solids, liquids and gases. Heat energy can
be transferred from hot areas to cool areas in 3 ways.
The 3 methods are
... Convection: Transfer of heat within a liquid or gas.
Conduction: Transfer of heat through matter by direct contact.
Thermal Radiation: The energy radiated by solids, liquids, and gases in the form of
electromagnetic waves as a result of their temperature.
Deformation: Alteration of shape, as by pres ...
Problem #1 Water is boiled at Tsat = 100°C by a spherical platinum
... Ammonia is liquefied in a horizontal condenser at 37°C by a coolant at 20°C. The pipe layout in the condenser is shown
in the figure. The tubes have an outer diameter of 3.8cm and inner diameter of 3cm. The flow is such that the internal
convection coefficient is 4,000 W/m2.°C and the tubes are made ...
What can be done about it?
... Possibly use a Copper solution in distilled water
• Common Ion Effect inhibits further ionisation.
... specific heat: willingness of an object to
change temperature, with the symbol Cp (the p
means "under constant pressure")
specific heat: the amount of energy required
to change the temperature of one gram of a
substance by 1°C
Heat and the Conservation of Energy
... Thermal conduction is
when heat is passed
along as the motion
of one atom does
work on an adjacent Conductors are materials that
atom making it move conduct heat quickly
Metals are good thermal
Ceramics, fiberglass etc do not,
they are thermal insulators
Liquids and Gases are good
Answers to Weather Questions pages 427 - 434
... Answers to Weather Questions pages 427 - 434
1. 95 percent of the solar radiation is absorbed by lakes, rivers and streams.
2. Specific heat capacity is the amount of heat that is required to raise the
temperature of one gram of a substance one degree Celsius.
3. Heat of fusion is the amount of heat ...
... Central heating was probably invented in ancient Greece, but engineers in ancient
Rome developed the hypocaust. A hypocaust was a network of tubes that was
built under floors or inside walls of buildings and connected to a fire in the
basement. The hot gases from the combustion of wood or coal rose ...
Flat Plate Boundary Layer
... coolant that flows through it to the air blown through it by the fan. Most modern cars use
aluminum radiators. These radiators are made by brazing thin aluminum fins to flattened
aluminum tubes. The coolant flows from the inlet to the outlet through many tubes
mounted in a parallel arrangement. The ...
16-2 - Laconia School District
... an instrument for measuring temperature, often a
sealed glass tube that contains a column of
liquid, as mercury, that expands and contracts, or
rises and falls, with temperature changes, the
temperature being read where the top of the
column coincides with a calibrated scale marked
on the tube or it ...
Chapter 6 Lesson 2 Name_____________ Describe the three ways
... In Figure 6-1, most of the heat provided by the fireplace in room C goes up the
chimney and is therefore transferred by ____________________.
In Figure 6-1, the thermal energy of the iron in room D is transferred to the
clothes by ____________________.
In Figure 6-1, room A, the heat from the pot on ...
Chapters 1 and 2
... Temperature is the thing that’s the same for two
objects, after they’ve been in contact long enough.
Long enough so that the two objects are in thermal
Time required to reach thermal equilibrium is the
Temperature is usually measured in K, C or F and
cannot be expres ...
... R-Value defined: a numerical
measure of resistance to the flow
of heat; the higher the R-value, the
greater the resistance to heat flow
Specific resistance of any material
is directly related to it’s thickness
Copper in heat exchangers
Heat exchangers are devices that transfer heat in order to achieve desired heating or cooling. An important design aspect of heat exchanger technology is the selection of appropriate materials to conduct and transfer heat fast and efficiently.Copper has many desirable properties for thermally efficient and durable heat exchangers. First and foremost, copper is an excellent conductor of heat. This means that copper's high thermal conductivity allows heat to pass through it quickly. Other desirable properties of copper in heat exchangers include its corrosion resistance, biofouling resistance, maximum allowable stress and internal pressure, creep rupture strength, fatigue strength, hardness, thermal expansion, specific heat, antimicrobial properties, tensile strength, yield strength, high melting point, alloyability, ease of fabrication, and ease of joining.The combination of these properties enable copper to be specified for heat exchangers in industrial facilities, HVAC systems, vehicular coolers and radiators, and as heat sinks to cool computers, disk drives, televisions, computer monitors, and other electronic equipment. Copper is also incorporated into the bottoms of high-quality cookware because the metal conducts heat quickly and distributes it evenly.Non-copper based heat exchangers are also available. Some alternative materials include aluminium, carbon steel, stainless steel, nickel alloys, and titanium.This article focuses on beneficial properties and common applications of copper in heat exchangers. New copper heat exchanger technologies for specific applications are also introduced.