# How do you calculate the power needed to heat water?

## How do you calculate the power needed to heat water?

Calculate the kilowatt-hours (kWh) required to heat the water using the following formula: Pt = (4.2 × L × T ) ÷ 3600. Pt is the power used to heat the water, in kWh. L is the number of liters of water that is being heated and T is the difference in temperature from what you started with, listed in degrees Celsius.

How do you calculate heat watts?

To calculate the wattage requirement to heat steel, use the following equation:

1. Watts = 0.05 x Lbs of Steel x ΔT (in °F) / Heat-Up Time (in hrs)
2. Watts = 3.1 x Gallons x ΔT (in °F) / Heat-Up Time (in hrs)
3. Watts = 165 x Gallons Per Minute X ΔT (in °F)
4. Watts = 1.35 x Gallons x ΔT (in °F) / Heat-Up Time (in hrs)

How many Btus does it take to heat 1 degree of water?

One BTU is the amount of heat energy required to raise one pound of water by 1ºF. Water weighs 8.33 pounds per gallon so we can calculate that one gallon of water requires 8.33 BTU to raise the temperature 1ºF.

### What is the formula for heating water?

The specific heat capacity of water is 4.18 J/g/°C. We wish to determine the value of Q – the quantity of heat. To do so, we would use the equation Q = m•C•ΔT. The m and the C are known; the ΔT can be determined from the initial and final temperature.

Do watts equal heat?

According to the Wikipedia online encyclopaedia, a 100 watt bulb is 2.1% efficient. In other words, it produces about 2 watts of light and 98 watts of heat. 100 watts of electricity will be converted to, at most 8 watts of light (including UV light) and 92% will still come out as heat.

How many Watts Does It take to heat 250 gallons of water?

Using the “Water Heating Power Calculator” above (250 us gallons, start temperature 103f, end temperature 105f, 120min) tells us that a heating power of 611 watts is required.

## How much energy does it take to heat one kilogram of water?

4168 is the constant for the heat capacity of water and means that it takes 4168 joules of energy to increase the temperature of 1 kilogram of water by 1 degree Celsius. The heating power is in watts in the formula.

How to calculate the heating power of water?

The heating power is in watts in the formula. A watt is defined as joules per second, e.g. 1W = 1 j/s = 1 joule per second.

How to calculate the heat required to heat 700 gal?

C p is the heat capacity of water = 1 BTU/lb ºF (given) ΔT = temperature difference = 120 ºF – 55 ºF Heat energy required to heat 700 gal can be calculated as follows: Heat Required = 5810 lbs x 1 BTU/lb ºF x (120 ºF – 55 ºF)