What is evaporation PPT?
EVAPORATION Defination:- Theoretically, • “Evaporation means simply vaporization from the surface of a liquid. Vaporization of a liquid below its boiling point is called evaporation.” • Thus, no boiling occurs and the rate of vaporization depends on the diffusion of vapour through the boundary layers above the liquid.
What is principle of evaporator?
Evaporation is a process, which is used to separate the solid substance which is dissolved in liquid. The principle of the evaporation process is that liquid vaporizes easily, whereas solids do not. 3 (7)
What is the pan evaporation rate?
Evaporation is measured daily as the depth of water (in inches) evaporates from the pan. At the end of 24 hours, the amount of water to refill the pan to exactly two inches from its top is measured. If precipitation occurs in the 24-hour period, it is taken into account in calculating the evaporation.
How is pan evaporation calculated?
The rainfall, if any, is measured simultaneously ❒ after 24 hours, the remaining quantity of water (i.e. water depth) is measured ❒ the amount of evaporation per time unit (the difference between the two measured water depths) is calculated; this is the pan evaporation: E pan (in mm/24 hours) ❒ the E pan is multiplied …
What is evaporator Slideshare?
Evaporation is the removal of solvent as a vapor from a solution or slurry Evaporation is used for concentration of aqueous solutions, it involves removal of water from solution by boiling the liquor in suitable vessel called evaporator and withdrawing the vapor.
Is evaporation a pan?
An evaporation pan is used to hold water during observations for the determination of the quantity of evaporation at a given location. Such pans are of varying sizes and shapes, the most commonly used being circular or square. The best known of the pans are the “Class A” evaporation pan and the “Sunken Colorado Pan”.
Which is the most common type of evaporator?
The dry evaporator design is the most common: the liquid refrigerant enters and flows through the evaporator and is slowly boiled off (evaporated), leaving the evaporator as a vapor.
Which are the type of evaporators?
Types of evaporators used today
- Natural/forced circulation evaporator.
- Falling film evaporator.
- Rising film (Long Tube Vertical) evaporator.
- Climbing and falling-film plate evaporator.
- Multiple-effect evaporators.
- Agitated thin film evaporators.
- Problems.
- Marine use.
What are the two functions of the evaporator?
Evaporators are responsible for the cool air that comes out of the vents. The evaporator’s cooling mechanism uses heat to do the job. Failure of the evaporator can lead to problems with the entire cooling system and damage some of your furnishings if the problem isn’t contained.
What are the parts of evaporator?
Evaporator Coils and the Split System
- Hot Side – Typically contains the condensing coil, the fan and the compressor, as well as various electrical switches and capacitors.
- Cold Side – Usually consist of a cold coil and an expansion valve, typically assembled as a sub-section of your air handler or furnace system.