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How do you calculate the heat load of a machine?

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How do you calculate the heat load of a machine?

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.

How do you calculate BTU for equipment?

Calculate the wattage of the device by multiplying the volts by the amps. For example, if the device has a voltage of 160 volts and a current of 2 amps, its wattage would be 320 watts (160 times 2). Divide the result by 3.413 — a constant figure — to determine the BTUs per hour.

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How do you calculate heat dissipation in electrical enclosures?

Qv – Heat loss installed in the enclosure (W) Qs – Thermal radiation via enclosure surface Qs = k *A * ∆T Qk – Required useful cooling output (W) ∆T – Temperature difference between inside and outside temperature (K) ∆T = (Ti-Tu) Qe – Required cooling output (W) Qe = Qv – Qs V – Required volumetric flow of fan and …

How do you calculate heat gain from equipment?

Basic Formulas The formula used to calculate heat gain from thermal conduction (outside ambient temperature during the cooling season) is the same basic formula as the Heat Loss Formula, [(Square Foot Area) x (U-Value) x (Temperature Difference)].

How do you calculate the heat output or dissipation BTU from an instrument?

PROCEDURE

  1. Your instrument’s Site Preparation Guide should specify the heat dissipation in kW.
  2. If no heat dissipation is specified you can take the typical power consumption as heat dissipation.
  3. If you prefer the value in British Thermal Units per hour, multiply by 3412 (1kW = 3412 BTU/h)
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How do you calculate heat dissipation on a switch?

To calculate heat dissipation of the switch, assume 90\% power consumption is converted to heat, and the efficiency of the power supply is 90\%. Heat dissipation/hour of the switch is 0.9 × (total power consumption of the cards plus power consumption of the fan tray)/0.9 × 3.4121.

How do you calculate the heat output or dissipation Btu from an instrument?

What is the equation for heat dissipation?

The heat dissipation within a resistor is simply the power dissipated across that resistor since power represents energy per time put into a system. So the relevant equation is the equation for power in a circuit: P = IV = I^2 R = \\frac {V^2} {R}, P = I V = I 2R = RV 2

What is the calculation for heat dissipation in BTU/hr?

OBJECTIVE or GOAL. How to calculate the heat output of an instrument in order to properly cool the laboratory.

  • ENVIRONMENT
  • PROCEDURE. Locate the specified amperage and voltage numbers for the equipment. Calculate: BTU/Hr = Average Watts x 3.412 or Volt Amps (VA) x 3.412
  • ADDITIONAL INFORMATION
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    What is the formula for BTU?

    The Formula. Math is the key to understanding how BTUs move through a system. The simple formula for water is System Delivered BTU = 500 x GPM x System Water Temperature Change. Let’s take a look at the formula to see what each piece of it means to help you understand it better. The BTU multiplier in the formula is 500.

    How do you calculate the heat released?

    To calculate the amount of heat released in a chemical reaction, use the equation Q = mc ΔT, where Q is the heat energy transferred (in joules), m is the mass of the liquid being heated (in grams), c is the specific heat capacity of the liquid (joule per gram degrees Celsius) and ΔT is the change in temperature of the liquid (degrees Celsius).