Water Btu Chart

We often refer to the british thermal unit as a btu but the rating is actually the btus per hour or btu h.

Water btu chart. 1 btu is equivalent to the amount of energy it takes to raise 1 lb of water by 1 f. But when the state of water changes from solid to fluid e g. The higher the btu the more water it is capable of heating. 1 btu 1 055 joules 252 calories 0 293 watt hour or the energy released by burning one match.

Temperature difference factor calculate the the temperature difference factor c outdoor temperature. Online water heat of vaporization calculator. Width ft length ft height ft number of square feet 0. A british thermal unit or btu is a unit of measurement of energy.

Btu calculator btu formulas for water circulating heat transfer. Btu is a measure of how much energy is needed to heat water. 8 33 pounds x 60 minutes 500 the second piece of the formula and sometimes the hardest to identify is flow rate in gpm or the system gallons per minute. Convert 5000w to btus per hour.

The power p in btus per hour btu hr is equal to 3 412141633 times the power p in watts w. 2 c to 2 c or from fluid to gas e g. 1w 3 412141633 btu hr. The british thermal unit or btu is an energy unit.

You have the ideal size for your needs. Calculate tons of cooling capacity tons btu hr. It is approximately the energy needed to heat one pound of water by 1 degree fahrenheit. Number of square feet calculate the number of square feet to heat.

Because btus are measured per hour the 500 comes from one gallon of water that weighs 8 33 pounds times 60 minutes in one hour. The output heat is given as kj mol kj kg kwh kg cal g btu it mol and btu it lb m. What is a btu. About equivalent to the heat generated by striking 1 stick match.

For example what size chiller is required to cool 40gpm from 70 f to 58 f t f 70 f 58 f 12 f. 1 watt is approximately 3 412 btu per hour. Oversize the chiller by 20 ideal size in tons tons x 1 2. 98 c to 102 c this does not hold true any more.

Hi john it takes the same amount of energy to heat water from 48 degrees to 52 degrees as it takes to heat water from 58 degrees to 62. The formula goes like this. To make sure you are getting the water hot enough you need to have a high btu for high water demand. A btu is an abbreviation for b ritish t hermal u nit which is the amount of energy required to raise 1 pound of water 1 degree fahrenheit at sea level.

P btu hr 3 412141633 p w. The calculator below can be used to calculate the liquid water heat of vaporization at vapor pressure at given temperatures. A btu is a relatively small amount of energy. 1 btu is the energy needed to heat 1 pound of water by 1 fahrenheit.