How do you calculate the heat produced by an electric motor?

Heat loss from an electrical motor to the surroundings.

1. 1 kW = 1.34 hp.
2. 1 hp = 0.746 k W.

How is waste heat calculated?

1. S = Cross sectional area (m2) of waste flow pipe/ducting. V = Flow velocity (m/sec) ρ = Media density (kg/m3)
2. Q = Waste energy flow rate (kW/hour) Value = monetary value per hour of the waste heat stream.
3. Unit cost = m’Currency’ per kW. fuel cost = cost for fuel used in currency per kW.

How much heat do electric motors produce?

The surface temperature of a continuously (and correctly) operating general purpose industrial electric motor will easily be 80 C (176 F) and perhaps as high as 100 C (212 F). You can’t keep your hand on a surface that hot long enough to discern differences, and if you try, you could get a nasty burn.

How do you calculate electric heat loss?

Hence the heating effect produced by an electric current, I through a conductor of resistance, R for a time, t is given by H = I2Rt. This equation is called the Joule’s equation of electrical heating. b)The resistance of the filament used in the bulb.

How do you calculate heat generated by electrical equipment?

Multiply the panel surface area times the BTU/hr. per square foot (or watts per square meter) to get the external heat transfer in BTU/hr or in watts. Sum the internal and external heat loads calculated.

How do you calculate heat load of a pump?

Basically, take the total volume of the rooms being heated (in cubic meters) and then determine the number of BTUs needed based on size, space, insulation, and more. Heat pump load calculations should only be performed by qualified HVAC contractors.

How is waste heat boiler efficiency calculated?

In general, we take this formula to calculate waste heat boiler thermal efficiency. η= 100-(q2+q3+q4+q5+q6), which include the Q2 flue gas losses, Q3 gas incomplete combustion losses, Q4 solid incomplete combustion losses, Q5 heat radiation losses and Q6 slag ash physical losses.

What is waste heat in thermodynamics?

Waste heat is the unused heat given to the surrounding environment (in the form of thermal energy) by a heat engine in a thermodynamic process in which it converts heat to useful work. Waste heat is often dissipated into the atmosphere, or large bodies of water like rivers, lakes and even the ocean.

How do you calculate heat loss in heat exchanger?

4.0 – HEAT EXCHANGERS CALCULATIONS:

1. The main basic Heat Exchanger equation is: Q = U x A x ΔTm =
2. The log mean temperature difference ΔTm is: ΔTm =
3. (T1 – t2) – (T2 – t1) = °F.
4. T1 = Inlet tube side fluid temperature; t2 = Outlet shell side fluid temperature;
5. ln (T1 – t2) (T2 – t1)

How do you calculate heat generation?

The heat generation rate in a nuclear core is directly proportional to the fission rate of the fuel and the thermal neutron flux present….Heat Generation.

˙Q	=	heat generation rate (Btu/hr)
˙m	=	mass flow rate (lbm/hr)
cp	=	specific heat capacity of reactor coolant system (Btu/lbm-°F)
ΔT	=	temperature difference across core (°F)

How do you calculate heat load from equipment?

By calculating the heat gain from each individual item and adding them together, an accurate heat load figure can be determined.

1. Calculate the area in square feet of the space to be cooled, and multiply by 31.25.
2. Calculate the heat gain through the windows.

How is electrical heat load calculated?

Assume 10\% forms heat = an internal heat load of 756 watts. Total internal power is 10 hp x 2544 BTU/hp = 25440 BTU/hr plus 100 watts x 3.415 BTU/hr/watt = 25782 BTU/hr. Assume 10\% forms heat = an internal heat load of 2578 BTU/hr. Total Heat Load: 756 + 40 – 796 watts or 2578 + 139 – 2717 BTU/hr.