Electric heater - electric energy and calculation
If the pure resistance circuit:
Because it is almost pure resistance circuit, so the formula for the P = VI. V is the
voltage, and I is the current. The power is mainly related to the resistivity. In general,
with the material of the electric wire, the greater the diameter, the smaller the resistance,
the greater the power. That is, after winding into the coil, the size and shape of the coil
power is not much impact.
If the non-pure resistance circuit:
1, the first need to determine the heating time (H) and temperature difference (degrees),
how long the degree of how much from the degree, this parameter is very important. If the
time is very short, then the required heating power may be large, waste of energy; if a long
time, the equipment preparation time is long, need a balance point.
2, the main equipment of the air volume (cubic meters), including the pipeline, estimate it.
3, air specific gravity 1.16 (Kg / m3), specific heat 0.24kcal / kg ℃.
4, there are heating efficiency, generally 0.5 to 0.6.
Calculated by the following formula: Heating power (KW) = (volume X specific gravity X specific
heat X temperature difference) / (860X temperature rise time X efficiency).
Electrothermal energy calculation formula: electric heat Q = I ^ 2Rt = IUt = Pt,
Among them, the voltage symbol U, the current symbol I, the resistance symbol R, R is called the
object's resistance coefficient or resistivity, which is related to the material of the object,
the value is equal to the unit length, the unit area of the object at 20 ℃ resistance.
Common conductor resistivity
Common resistivity of the conductor at 20 ℃ when the resistivity (? Ω? M)
Silver 0.016
Copper 0.0172
Gold 0.022
Aluminum 0.029
Zinc 0.059
Iron 0.0978
Lead 0.206
Mercury 0.958
Carbon 25
Copper (54% copper, 46% nickel) 0.50
Manganese copper (86% copper, 12% manganese, 2% nickel) 0.43
Contact Us:
Eric Xie
Tel: +86 15988295936
SKYPE: ericxie123@outlook.com
Whatsapp: +8615988295936
Wechat: +8615988295936
Email: sale@benoelectric.com
Website:www.benoindustry.com
