# What is Evaporator: Definition and 23 Discussions

An evaporator is a device in a process used to turn the liquid form of a chemical substance such as water into its gaseous-form/vapor. The liquid is evaporated, or vaporized, into a gas form of the targeted substance in that process.

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1. ### Why does decreasing evaporator airflow impact an air conditioner's performance?

The other day I read on a website that a lower evaporator airflow causes lower low pressure side saturation temperatures and higher delta T on an air-conditioner. Now I think I know why a lower evaporator airflow would cause a high delta T. If there is less air moving over the evaporator, the...
2. ### Mathematical Modeling of an evaporator for evaporating water

I am trying to model an evaporator which evaporates water to steam in Matlab/simulink. Are there any governing equations i need to know and follow when modelling the evaporator mathematically? Please let me know.
3. ### Double Effect Evaporator

Homework Statement A double effect forward feed evaporator is to concentrate a 12.5% solution of a certain chemical compound "YZ". The feed is to be at and is to be 120 F of such an amount as to contain 6250 "YZ" per hour. Saturated steam is available at 250 F (29.7 psi ). The accepted value of...
4. ### What are the temperatures of the evaporator and condenser?

Homework Statement By the data given below, Condenser Inlet Pressure (P1/kPa) 1164 Condenser Inlet Temperature (T1/K) 382.8 Condenser Outlet Pressure (P2/kPa) 1102 Condenser Outlet Temperature (T2/K) 297.2 Evaporator Inlet Pressure (P3/kPa) 290 Evaporator Inlet Temperature (T3/K) 259.5...
5. ### Calculation of heat created during compression

Homework Statement Hello, I have a task to make a heat balance of the evaporator. To do this, I was told to carry a few smaller energy balances in different parts of the evaporator. One of the things I had to calculate was the heat generated during steam compression. -steam is entering...
6. ### How increase in evaporator increases Refrigeration effect?

It appears very non intuitive to me seeing TS diagram of vapour compression system; Area under the curve increases. But how seriously how higher evaporator temperature will lead to higher refrigeration effect. Refrigeration effect means lower temperature.
7. ### Single Effect Evaporator Calculation

Hi All. Please can someone help? I have a question regarding calculating heat load and required surface area for a single effect evaporator. Details: Solution Feed rate 1.1kg s-1 Solution feed concentration 8%, concentrated to 30% Feed solution at 60 degrees Celsius with Specific Heat Capacity...
8. ### Rotary evaporator contamination

Homework Statement Before, I started to evaporate my solvent (butanol) by using rotary evaporator, I greased the ground glass joint holding my flask and bump trapper. Subsequently, I secured my flask sample and the trapper with Keck clip . Is there any possibility that my sample may have been...
9. ### Shell & Tube Falling Film Evaporator Nickel Tubes Collapsed

An unfortunate incident happened at our triple effect caustic evaporator (32w.t% to 51w.t%). The third effect (highlighted red) where major steam (~12-13bar depending on flowrate) assisted evaporation take place, here for some reason Ni tubes get severely collapsed, while the plant was offline...
10. ### Compressor Water Cooled Chiller Thermal Calculations

Hi All, Is there a list of thermodynamics equations regarding the chiller process from condenser, evaporator, compressor to the regulator. Say I have chiller load at 90%, what set of equations could I use to determine the supply temperature of chill water and condenser supply temperature to...
11. ### Design of Vapour Compression Refrigeration Cycle

Hi! For our class project, we have to design a system that freezes an amount of water as quick as possible. The refrigerant is R134a. The compressor is known. I don't really know how to get started here. How do I choose the evaporator pressure and the superheating, and equally the condensor...
12. ### Thermodynamics - evaporator condenser

Hello - fundamental thermo question which is puzzling me... It concerns a multiple effect evaporator with condenser. Hot vapour is water, cooling medium is water. My question stems from the following: When the flow of cooling water to the condenser is increased, the pressure in the condenser...
13. ### Internal heat exchanger on Evaporator

You can read just bold, or all for further info. :D The COP for a single stage vapour compression refrigerator increases with an increase in evaporating temperature. I would like to to know how it is achieved in reality with the use of an internal heat exch. on the evaporator. Can anyone...
14. ### Refrigeration - Work done by evaporator, condenser, expansion valve

In vapor compression refrigeration, I know how to calculate the work done by the compressor (enthalpy at outlet - enthalpy at inlet), but I am lost on how to calculate the work done by the evaporator, condenser, and the expansion valve. For the evaporator and condenser, if I wish to have a...
15. ### Manufacturing Process To Made Air Conditioner Evaporator

Hi! I really want to know how evaporator is made. i mean it is impossible to made by casting process, but i also not sure. anyboby who involve in this industry can please help me
16. ### Calculate refrigerant temp inside evaporator based on exit temp and pressure

Hi guys, I'm stuck on some thermodynamic calculations and I would really appreciate some help! I'm trying to calculate the refrigerant temperature inside of an evaporator (two-phase lumped parameter model) based on the exit temperature of the evaporator and the pressure. I've understood that...
17. ### Why does the refrigerant in an air-conditioner's evaporator become cold?

I believe that when refrigerant in an air-conditioner's evaporator boils into gas, the pressure on the refrigerant goes down tremendously. I believe that the drop in pressure on the refrigerant when it becomes a gas causes the temperature of the refrigerant to drop. I believe this because I...
18. ### Archived Calculating Flow Rates in a Continuous Vacuum Evaporator

Homework Statement I have attached a diagram, for this question, I am stuck on how to calculate the flow rate. there is 70kg/h of feed going into the evaporator, of which 11% is solids, so that's 7.7kg/h of solids, and so 62.3kg/h of liquid in the feed. so now how do I calculate the...
19. ### Evaporator machine but in the operations manual

Hello, Could someone please give me an explanation using the following equation? I work this evaporator machine but in the operations manual there is this equation below.I would like to further my knowledge. Equation for Evaporation Q = U x A x DT Q = Energy Transfer (W) U = Heat...
20. ### Refrigeration - Fouling in the sizing evaporator and condenser

Hey, I am trying to determine the importantance and difference of fouling in sizing the evaporator and condenser in a Refrigeration cycle? Thanks, Alexisonsmith
21. ### Discover the Essential Steps for Optimal Evaporator Design | Expert Tips

please let me know about evaporator design steps
22. ### Heat exchanger capacity (condenser and evaporator)

Window-type Aircon how to get this in an actual experiment? is it just (mass flow rate of the refrigerant X specific heat X Change in temp of the refrigerant) or (mass flow rate of the air passing thru the heat exchanger X specific heat X Change in temp of the air) or (mass flow rate of the...
23. ### Understand Evaporator Terms & Choose Right Compressor

1.superheat Psig Saturated Temp Suction line temp superheat temp. 58 32 44 12 64 37 47 10 70 41 50 9 can some1 help me understand the ratings above.. Saturated temperature...