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Sep 1, 2024 · But, be careful with space heaters. They use a lot of energy, costing up to 10 times more per BTU than natural gas in some places. Also, using them wrong is a big reason for house fires, causing 84% of heating fire deaths. To use space heaters safely and well, follow these tips: Never leave a space heater on by itself, especially near kids or pets.
- Space Heating
- Liquid Heating
- Environmental and Efficiency Aspects
- Economic Aspects
- Industrial Electric Heating
Space heatingis used to warm the interiors of buildings. Space heaters are useful in places where air-handling is difficult, such as in laboratories. Several methods of electric space heating are used.
Immersion heater
An immersion heater has an electrical resistance heating element encased in a tube and directly placed in the water (or other fluid) to be heated. Portable immersion heaters may not have a control thermostat, since they are intended to be used only briefly and under control of an operator. For domestic hot water supply, or industrial process hot water, permanently installed heating elements in an insulated hot water tank may be used, controlled by a thermostatto regulate temperature. Househol...
Circulation heaters
Circulation heaters or "direct electric heat exchangers" (DEHE) use heating elements inserted into a "shell side" medium directly to provide the heating effect. All of the heat generated by the electric circulation heater is transferred into the medium, thus an electric heater is 100 percent efficient. Direct electric heat exchangers or "circulation heaters" are used to heat liquids and gases in industrial processes.
Electrode heater
With an electrode heater, there is no wire-wound resistance and the liquid itself acts as the resistance. This has potential hazards, so the regulations governing electrode heaters are strict.
The efficiency of any system depends on the definition of the boundaries of the system. For an electrical energy customer the efficiency of electric space heating is 100% because all purchased energy is converted to heat. However, if a power plant supplying electricity is included, the overall efficiency drops drastically. For example, a fossil-fue...
The operation of electric resistance heaters to heat an area for long periods is costly in many regions. However, intermittent or partial day use can be more cost efficient than whole building heating due to superior zonal control. For example: A lunch room in an office setting has limited hours of operation. During low-use periods a "monitor" leve...
Electric heating is widely used in industry. Advantages of electric heating methods over other forms include precision control of temperature and distribution of heat energy, combustion not used to develop heat, and the ability to attain temperatures not readily achievable with chemical combustion. Electric heat can be accurately applied at the pre...
Mar 24, 2024 · Heaters work by generating heat and transferring it through convection, radiation, or conduction. Whether it’s warming the air, radiating heat waves, or transferring heat through contact, the goal is to keep us cozy and comfortable. Understanding how heaters work can help kids appreciate the warmth they provide during the colder months.
Welcome to Electric Heaters 101! In this comprehensive guide, we delve into the world of electric heaters and everything you need to know to make informed de...
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Mar 25, 2022 · How to repair portable room heaters by Mort Schultz. Popular Mechanics, December 1978, p30. A simple explanation of how different electric heaters work and how to replace broken heating elements safely. This is an old article, but the advice still holds good. Patents. These offer quite a bit more technical insight and detail.
The degree of ventilation required depends on the building’s use, the height of the ceilings, the number of door openings, and the number of occupants. A ventilating system may be required to supply an amount of fresh air ranging from 7.5 to 40 cubic feet (0.2 to 1.1 cubic meters) per minute for each occupant.
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Sep 18, 2023 · Oil-filled space heaters operate on a fundamental principle of convection, harnessing the unique properties of diathermic oil as their heat transfer medium. Unlike conventional heaters that rely on the direct heating of air, these devices employ a more intricate mechanism. The diathermic oil, sealed within the heater’s core, acts as a ...
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