Latent heat calculation. wg) = Pa / 249 Water Side Q = USGPM x (t i â t f) x 500 Btuh Q = USGPM x (t iât f) x Q = sensible heat transferred (Btu/hr) Q = sensible heat transferred (Btu/hr) CFM = quantity of air (f t 3 /min) GPM = quantity of water (gallons/min) T = dry bulb temperature difference (°F) T = dry bulb temperature difference (°F) This house is 25'x40' (1000SF) on the interior with an 8' ceiling, is built with the double stud wall shown in the example above, double glaze low-E windows (U .3), R5 doors, and has a â¦ Sensible heat is heat exchanged by a body or thermodynamic system that changes the temperature, and some macroscopic variables of the body, but leaves unchanged certain other macroscopic variables, such as volume or pressure.The term is used in contrast to a latent heat, which is the amount of heat exchanged that is hidden, meaning it occurs without change of temperature. m [kg] is the mass of the body, L [kJ/kg] is the specific latent heat, Q [kJ] is the heat absorbed or released depending on the direction of the transition. Liquids are considered incompressible. Sensible = CFM x (t i â t f) x 1.085 Btuh Q Latent = CFM x (Gr i â Gr f) x .068 Btuh Humidification = CFM x (Gr fâGr i) / 1,555 lbs/hr CFM = l/s x 2.12 Air Pressure Drop (in. Only Sensible Heat Transfer occurs. Calculation assumes true counter flow. Using the sensible heat formula, BTUH = 1.08 x CFM x Delta T Delta T = BTUH /(1.08 x CFM) Soâ¦.. Delta T = 25, 010/(1.08 x 1400) 0.0. Fluid temperature ranges from 40°F to 200°F: ACFM is assumed to be at the average air temperature. All we need to know to compute the latent heat is the amount of substance and its specific latent heat. Additionally, it provides equipment recommendation (type heating/cooling system appropriate for your home), & calculates the cost of installing the equipment, including labor & materials! This HVAC Load Calculator (also known as BTU Calculator) provides an accurate real world heat load estimate for both Heating & Cooling. Let's start with couple of definitions: Heat is the amount of energy flowing from one body of matter to another spontaneously due to their temperature difference, or by any means other than through work or the transfer of matter. Air is assumed to be dry, at atmospheric pressure and at zero elevation. To do so, find the sensible capacity at any set of conditions, for example at 95 degrees outdoor air and 1400 CFM, the sensible capacity is: At 72 wb 25,010 BTUH At 67 wb 31,730 BTUH At 63 wb 37,360 BTUH At 57 wb 37,930 BTUH. Sensible Heat Calculator When you multiply the mass, specific heat capacity and change in temperature in the above given sensible heat formula you will get the result of energy released in the atmosphere. Updated 13 Jun 2018. The formula is: Q = m * L, where. The standards-based unit in the International System of Units (SI) is the joule (J). Historically, many energy units for measurement of heat have been used. The function calculates the sensible heat lost/gained by a substance. Sensible heat at any temperature can be calculated by replacing that temperature in the enthalpy increment equation Enthalpy increment equation can also be used to calculate enthalpy change between any two temperatures âð»=ð»ðâð»298=ï¿½+ï¿½ð+ï¿½ð+ ï¿½ ð Fluid properties are used at the average temperatures. 6 Downloads. 0 Ratings. The following is an example house, to show a complete heat loss calculation. Heat Loss Calculation Example. Sensible Heat Calculator. version 1.0.0.0 (452 Bytes) by Ankur Gaikwad. Also, you can check the above calculator link for ease calculations. A substance 40°F to 200°F: ACFM is assumed to be dry, at atmospheric pressure and at elevation. Real world heat Load estimate for both Heating & Cooling unit in the International System of units ( SI is. The International System of units ( SI ) is the joule ( )!: Q = m * L, where the formula is: Q = *! 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