How do you calculate the effectiveness of a heat pipe?
Effectiveness of a heat pipe can be represented by a system of thermal resistance. The thermal resistance �� can be represented by �� �� = �� − �� �� �� ∘ C / W . ( 1 ) The overall heat transfer coefficient, ℎ of the heat pipe can be given by �� ℎ = �� �� �� − �� �� W / m 2 ⋅ ∘ C ..
How is a heat pipe made?
Heat pipes are constructed of metal pipes made of copper, aluminum or other metals with high thermal conductivity, sealed inside which is a small amount of liquid called a working fluid (e.g., pure water) and a capillary structure (wick)..
What is the concept of heat pipe?
A heat pipe consists of an evaporation zone, an adiabatic zone, and a condensation zone. Liquid in contact with the evaporation zone turns into vapor by absorbing heat, and vapor then travels along the heat pipe to the condensation zone and condenses back into liquid, releasing the latent heat..
What is the methodology of heat pipe?
Warm incoming air is precooled by the evaporator (precool) section of the heat pipes. The air is then cooled further (overcooled) by the cooling coil for more moisture extraction. Next, air is passively heated back up by the condenser (reheat) section of the heat pipes to lower the relative humidity..
What is the overview of heat pipe?
A heat pipe is a vacuum-sealed device filled with working fluid and works on heat transfer through the liquid-vapor phase change of working fluid..
A heat pipe is a vacuum-sealed device filled with working fluid and works on heat transfer through the liquid-vapor phase change of working fluid.
A heater and heat sink are attached to either ends of the heat pipe, corresponding to the evaporator and condenser sections respectively. The heat pipe is then put under a heating load, and the temperature difference between the evaporator and condenser sections is measured.
Heat transfer analysis solves for unknown temperatures and fluxes under thermal loading. Linear Transient Heat Transfer Analysis. Calculates the temperature distribution in a system with respect to time. Nonlinear Transient Heat Transfer Analysis. Calculates the temperature distribution in a system with respect to time
Design using CATIA software and fabrication of the heat pipe is done experimentally .The objective is that in the place of copper, the sintered powder and
How do you design a heat pipe?
From the thermal requirement, determine the type of heat pipe
From the heat transport requirement, determine the heat pipe diameter and length, and number of heat pipes
Once the performance requirements and specifications are defined, the design and evaluation process can be initiated
What are the characteristics of a heat pipe?
It must possess high thermal conductivity, high latent heat, good wettability, low viscosity in vapor as well as in liquid phase, high surface tension, moderate vapor pressure, and compatibility with the materials used for the wick and wall of the heat pipe
What is a heat pipe thermal model?
The heat pipe thermal model (evaporator and condenser section) is a sum of thermal resistances for the evaporator and condenser parts (R con− ev ) , and it can be written as:
where x represents the wall or wick thickness, while k and A are the thermal conductivity and area of the heat pipe wall or wick
Concentric Tube Heat Exchangers are used in a variety of industries for purposes such as material processing, food preparation, and air-conditioning. They create a temperature driving force by passing fluid streams of different temperatures parallel to each other, separated by a physical boundary in the form of a pipe. This induces forced convection, transferring heat to/from the product.
Component to protect against excessive heat
In engineering, a heat shield is a component designed to protect an object or a human operator from being burnt or overheated by dissipating, reflecting, and/or absorbing heat. The term is most often used in reference to exhaust heat management and to systems for dissipating frictional heat. Heat shields are used most commonly in automotive and aerospace.
Design and analysis of heat pipe
Device that tends to equalize temperature over its surface
A heat spreader transfers energy as heat from a hotter source to a colder heat sink or heat exchanger. There are two thermodynamic types, passive and active. The most common sort of passive heat spreader is a plate or block of material having high thermal conductivity, such as copper, aluminum, or diamond. An active heat spreader speeds up heat transfer with expenditure of energy as work supplied by an external source.
