What is load in HVAC system?
The HVAC industry describes the amount of conditioning homes need as heating and cooling loads. The load refers to the amount of work any system must do to keep the structure comfortable. HVAC professionals base the size of the systems they install on their capacity to satisfy three different kinds of loads.
Why is it important to know about sensible and latent heat?
When the molecules return to a liquid state the latent heat is released as sensible heat (heat you can feel basically). It is important in the atmosphere because it is the primary factor involved in the formation of convective clouds and the stability/instability of the atmosphere.
How do you find sensible heat?
Sensible heating Btu is measured by the ageless formula CFM x Delta-T x 1.08. To measure heating Btu, multiply the measure supply airflow (in cfm) by the temperature change from the average supply register temperature to the average return grille temperature, and multiply this total by the formula constant of 1.08.
How do you calculate latent heat of air?
Since our latent heat value is in the units of btu/hour and we presently have “minute” units, we must convert to hours by mulitplying by 60. QL → (btu/hr) = ΔW (grains/lb) x Airflow (cubic feet/minute) x 60 minutes/hour x ?
What is latent heat and its units?
Latent heat, energy absorbed or released by a substance during a change in its physical state (phase) that occurs without changing its temperature. The latent heat is normally expressed as the amount of heat (in units of joules or calories) per mole or unit mass of the substance undergoing a change of state.
Which of the following is unit of latent heat?
joules
What are the types of latent heat What is the SI unit of latent heat?
Answer: The unit of latent heat is joule. Latent heat is the amount of heat energy consumed or emitted during a phase change.
What is SI unit of latent heat of vaporization?
The SI unit of latent heat of vaporization is joule per kilogram [J/kg]
What is the CGS unit of specific latent heat?
Unit of latent heat is J/kg in SI system and cal/g in cgs system.
What is the dimension of latent heat?
Therefore, latent heat is dimensionally represented as [M0L2T−2]