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★ Capacity Calculation
★ Air heating calculation
★ Water heating calculation
★ Calculation of the heater
★ Three-phase star connection
★ Three-phase triangle calculation

## ★ Heat calculation: Capacity Calculation

Enter a numerical value or calculation formula, and then click [Calculate].

### Capacity required to raise the temperature of the object

 Mass of object to be heated - A: kg Specific heat of the object to be heated - B: J/kg ℃ Required temperature rise - C: ℃ Temperature rise time - D: Hour Required capacity - E: W To raise the temperature of an object A [kg] with a specific heat B [J/kg °C] by C [°C] in D [hours], a capacity of E [W] is required.

### Volume required for melting or evaporating the object

 Mass of object to be heated - A: kg Heat of melting or evaporation of the object to be heated - B: kJ/kg Time to melt or evaporate - C: Hour Required capacity - D: W In order to melt or evaporate an object A [kg] with heat of fusion or heat of evaporation B [kJ/kg] in C [time], a capacity of D [W] is required.

## ★ Heat calculation: air heating capacity calculation

Value at 1atm (1013.3hPa). It can be calculated from -100 ℃ to 1600 ℃.

Enter a numerical value or formula, and then click [Calculate].

### The volume required to raise the temperature of a volume of air

 Volume of air to be heated - A: m3 Temperature before heating - B: ℃ Temperature after heating - C: ℃ Temperature rise time - D: Hour Air mass - E: kg Air volume after heating - F: m3 Required capacity - G: W

In order to raise the temperature of air with volume A [m3] and temperature B [°C] to C [°C] in D [hours], a capacity of G [W] is required.

### Capacity required to raise the temperature of a certain mass of air

 Mass of air to be heated - A: kg Temperature before heating - B: ℃ Temperature after heating - C: ℃ Temperature rise time - D: Hour Air volume before heating - E: m3 Air volume after heating - F: m3 Required capacity - G: W

G [W] capacity is required to raise the temperature of air with mass A [kg] and temperature B [°C] to C [°C] in D [hours].

## ★ Heat calculation: Water heating capacity calculation

Enter a numerical value or formula, and then click [Calculate].

### Capacity required to raise the temperature of a certain mass of water (ice / steam)

Value at 1atm (1013.3hPa). Water is between 0 ° C and 100 ° C, ice below, and steam above.

It can be calculated from -200 ℃ to 300 ℃.

 Mass of water to be heated - A: kg Temperature before heating - B: ℃ Temperature after heating - C: ℃ Temperature rise time - D: Hour Before heating: After heating: Required capacity - E: W

Water (ice / steam) with mass A [kg] and temperature B [°C] is converted to C [°C] in D [hours].

To raise the temperature, E [W] capacity is required.

Ice → water has “heat of melting (334kJ / kg)”

For water → steam, “heat of evaporation (2257kJ / kg)” is required.

### Simple calculation including heat dissipation loss when heating water in a container

You can calculate from 0 °C to 100 °C.

 Container lid: No  Yes Container insulation: No  Yes Mass of water to be heated - A: kg Temperature before heating - B: ℃ Temperature after heating - C: ℃ Temperature rise time - D: Hour Required capacity - E: W Heat dissipation loss - F: % Heat dissipation at water temperature C - G: W

In order to raise the temperature of water with mass A [kg] and temperature B [° C] to C [° C] in D [hours], a capacity of E [W] is required, of which F% is the heat dissipation loss. is.

The heat loss depends on the heating conditions, so use this calculation as a guide.

### Conditions for simple calculation

• Room temperature is the same as temperature B before heating, there is no wind.

• The container is made of metal and is full of water. Container top is in contact with the air.

• Cover with insulation.

• Insulation thickness 50mm.

## ★ About heater: Heater calculation

Enter two numerical values on the input line, and then click [Calculate].

### Single phase heater

 Voltage E Current I Resistance R Electric power W V A Ω W Calculation result: V A Ω W

In an actual heater, there is a temperature coefficient of resistance, so R during cold is smaller than this. ### Three phase heater

 Voltage E Current I Resistance R Electric power W V A Ω W Calculation result: V A Ω W

In an actual heater, there is a temperature coefficient of resistance, so R during cold is smaller than this. ## ★ About heater: Calculation of three-phase star connection

Enter the power supply voltage and each resistance value, calculate the line current and power.

Enter a numerical value or formula, and then click [Calculate].

 Power-supply voltage E: V Resistance value Ra: Ω Resistance value Ra Rb: Ω Resistance value Ra Rc: Ω Current Ia: A Current Ib: A Current Ic: A Ra power: W Ra power: W Ra power: W Total power W: W ## ★ About heater: Calculation of three-phase delta connection

After inputting the power supply voltage and each resistance value, the phase current, line current and power are calculated.

Enter a numerical value or formula, and then click [Calculate].

 Power-supply voltage - E: V Resistance value - Ra: Ω Resistance value - Rb: Ω Resistance value - Rc: Ω Phase current - Iba: A Phase current - Icb: A Phase current - Iac: A Current - Ia: A Current - Ib: A Current - Ic: A Power - Ra: W Power - Rb: W Power - Rc: W Total power - W: W Power-supply voltage - E: V Power - Ra: W Power - Rb: W Power - Rc: W Resistance value - Ra: Ω Resistance value - Rb: Ω Resistance value - Rc: Ω Phase current - Iba: A Phase current - Icb: A Phase current - Iac: A Current - Ia: A Current - Ib: A Current - Ic: A a-b resistance: Ω b-c resistance: Ω a-c resistance: Ω
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