Questions tagged [evaporation]

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Estimating rate of drying by comparing identical process with different ambient humidity

We have a drying process where we take a thin bread product and cool it in a room at 11 C and 90% relative humidity. The product comes in at 80 C and comes out at 22 C. There is air blowing across the ...
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3answers
27 views

How to dump moist air without heat backflow in evaporative cooling system?

I'm looking to design or purchase an evaporative cooling system for a small 70ft^2 California dorm room without air conditioning. This room has a single window and door to a large common space with a ...
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1answer
106 views

Exiting air temperature in direct evaporative cooler vs cooling tower

In a direct evaporative cooler, dry air is passed by a water reservoir to evaporate water into the air, causing the latent heat of vaporization to be absorbed from both the air and the water; this ...
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1answer
43 views

Calculate amount of evaporative coolers needed to cool down an area

I have a task to create a software that calculates how much evaporative coolers are needed to maintain a certain temperature in a given room. I need to create a simple form, where variables are next : ...
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17 views

Safely evaporate electrolyte from fragile porous substrate

We have porous ceramic platelets of ~50x5x1 mm³ thickness infiltrated with ammonium nitrate solution (NH4NO3). We want to decompose and evaporate it w/o damaging the fragile substrate (decomposition ...
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1answer
93 views

Why is it generally assumed that the evaporator works isothermally?

Since an evaporator also a heat exchanger, how can the inlet and outlet temperatures of the HEX accepted as the same, i.e. isothermal? In this case, cold stream (inlet and outlet of the evaporator in ...
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1answer
367 views

Is evaporative cooling for a pool effective?

Hot humid east TX; Large subdivision pool is warm ,92F. A plan is being make to cool it with evaportive spray . One data point is : dry bulb= 82.0 , wet bulb = 79.7 F. This is likely typical average ...
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1answer
727 views

Water vacuum evaporation thermodynamics

A vacuum evaporation system works keeping warm water inside a sealed vessel, which is evacuated with a reversed compressor (or vacuum pump) to keep an inside pressure lower than atmospheric pressure, ...
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1answer
182 views

Is Vapor Compression Distillation inherently more efficient than a thermal-only boiler-condensor?

I'm having a hard time understanding the benefits of VCD (like Slingshot) over a conventional boiler in terms of volume of condensate produced per unit of energy input. I've found quite a few ...
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2answers
111 views

Evaporative roof cooling

I have slightly inclined (50 cm over 6 meters) metal roof over my studio. The roof has bad thermal insluation -- 15 cm of mineral wool between sheet metal. The location is Kiev, Ukraine. Ambient ...
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1answer
448 views

Optimum airflow for drying with heated air

I'm building something to dry glass tubes. It's raised a question which I'd like some background knowledge on before I draw up requirements for the design. Say I want to dry something with heat alone,...