Essay On Electric Heater
ELECTRIC HEATER
Sachin Pandey
Roll No: 712CH1099
Introduction:
An electric heater is a device that converts electrical current to heat energy. The basic principle followed by the heater is Joule heating and the main heating element responsible for this heating effect is a resistor. When an inductive current passes through these resistors heat energy is produced due to the ‘Joule losses’ caused by the eddy currents induced inside the heater. There can be different types of electric heater based on the type of the resistor used or based on the enclosure used for the heater. In this article the various types of electric heaters based on the type of resistor and the enclosure are discussed in brief.
Discussions:
Electric heaters have a lot of advantage
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The principal object of this invention is to provide an improved downhole heating. Down-hole heating tools find usage in several operations in well service. For example, heating the well casing to accelerate the setting time of cement lying between the oasing and the annulus of the well bore. This consists of a down hole heating tool comprising an axially disposed central core composed of metallic tubing of magnetic material such as mild steel and a number of magnetic core elements each comprising of a number of C-shaped laminations. The C-shaped core elements are radially mounted around the core with the open ends of the C facing and in contact with the tubing and have a coil of magnet wire disposed around the tubing between the ends of the magnetic core elements.
Figure 3 – Induction Heater (Cronberger et al., US Patent No. – 3, 071, 675; 1 st January 1963)
References:
1) Bottom-hole Electric Heater, Driga Mircea, United States Patent No.: 3,376,403; Date of
Patent – 2 nd April 1964.
2) Electric heater for oil wells, Thad L. Jarvis, United States Patent No.: 2,302,774; Date of
Patent – 24th November 1942.
3) Induction Heater, Luther C. Cronberger, United States Patent No.: 3, 071, 675; Date of
Patent – 1 st January
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