Power consumption in heater plate calculation

          

            Heat transfer is the movement of thermal energy from one object or system to another as a result of a temperatue  differential. Heat transfer always occurs from the object or system with a higher temperature to the one with a lower temperature until both reach thermal equilibrium, i.e., they have the same temperature. The amount of heat transported is determined by the temperature difference, the qualities of the materials involved, and the medium used to transfer the heat (e.g., conduction, convection, or radiation).

The SI unit of heat is the joule (J).

    Heat transfer is the process of thermal energy transferring from one object or system to another due to a temperature differential. Heat can be transferred via three main mechanisms: conduction, convection, and radiation. Conduction is the passage of heat through a material or substance as heat moves from high-temperature areas to low-temperature areas. When you touch a hot stove, for example, heat is transported from the stove to your hand by conduction.

       Convection is the movement of fluids such as air or water that transfers heat. When you boil water on a stove, for example, heat is transmitted to the water by convection as hot water rises and cooler water descends.

The transfer of heat via electromagnetic waves, such as light or infrared radiation, is referred to as radiation. The sun, for example, heats the Earth through radiation.

              The heat that is transmitted may be determined using the formula Q = mcT, where Q represents the amount of heat transferred, m represents the mass of the object being heated, c represents the object's specific heat capacity, and T represents the temperature change. This formula can be used to compute heat transfer in any of the three heat transfer modes. 

Types Of Heaters On The Market.

There are many kind of heaters available, each with its own set of pros and disadvantages depending on the specific use and requirements. Some typical types of heaters are:

1.  Convection heaters: These heaters warm the air in a space, which then circulates and heats the things in the room. Convection heaters include oil-filled radiators, fan-forced heaters, and baseboard heaters. 

2.  Radiant heaters: These heaters emit infrared radiation, which heats the items directly in front of them rather than warming the air. Radiant heaters include halogen heaters and quartz heaters..

3.  Forced air heaters: These heaters work by blowing air across a heating element, which warms the air and circulates it throughout the space. Furnace systems, heat pumps, and space heaters are examples of forced air heaters.

4   Electric heaters: These heaters use electricity to generate heat and are frequently employed for portable or small-scale heating applications. Electric space heaters and electric baseboard heaters are two examples of electric heaters.

5. Gas heaters: These heaters create heat using natural gas or propane and are commonly employed in larger-scale heating applications. Gas furnaces and gas-fired space heaters are examples of gas heaters.

The type of heater used will be determined by considerations such as the size of the room to be heated, the available energy source, and the desired level of comfort and efficiency. 

Heat transfer is the passage of thermal energy from one item or material to another as a result of a temperature differential. Thermal energy is the energy that an object has as a result of its particles' motion, and it contains both kinetic and potential energy.

Conduction, convection, and radiation are the three basic processes of heat transfer. 

             Heat transfer is the exchange of thermal energy between physical systems. The rate of heat transfer is dependent on the temperatures of the systems and the properties of the intervening medium through which the heat is transferred.

              Heat is transferred by three mechanisms: conduction, convection, and radiation. Conduction is the transfer of energy from the more energetic particles of a substance to the adjacent less energetic ones as a result of interaction between particles. Convection is the transfer of energy between a solid surface and the adjacent fluid that is in motion, and it involves the combined effects of conduction and fluid motion. Radiation is the transfer of energy due to the emission of electromagnetic waves (or photons).       

  

Calculating The Overall Heat Demand For Applications With Insertion Heaters

Platen size          = 500 x 200 x 50

Platen material   = aluminum

Environment temperature = 30 C

Needed temperature          = 180 C

Temperature raise duration = 15 min = 900 sec.

Now find out the required Energy to rise. The temperature

Platen Size	=	500 × 200 × 50
Platen Material	=	Aluminum
Environment Temperature	=	30 C
Needed Temperature	=	180 C
Temperature Raise Duration	=	15 min = 900 sec.
Now find out the required Energy to rise. The temperature
Platen Volume	=	0.5×0.2×0.05
	=	0.005 m3
Weight	=	0.005×2700
	=	13.5 Kg.
Needed Temperature Rise	=	180-30 = 150 C
Energy required = Mass ×Specific heat × Temperature raised
E	=	m×s×t
Heat Energy	=	13.5 × 913 × 150
	=	1848825 Watt
	=	1848.82 KW
Rise the temperature 180 C will be require energy 1850 KW in 1 sec duration. But we are needs rising temperature within 15 min so requires energy.
Heater Capacity Required	=	1848.82÷900
	=	2.05 KW
Once total heat requirements are established, the quantity, size and rating of cartridge heaters can be decided. The term "Watt density" refers to the heat flow rate or surface loading. It is the number of Watts per square inch of heated surface area. this calculation are used in packaging industry ( sealer load Calculation )
Material Specific heat (s)
Water.           =  4200. J/Kg.C
Copper.         =  385 J/Kg.C
Aluminum   =  913 J/Kg.C
Brick.            =  840 J/Kg.C