Find and discuss at least 3 different technologies that are able to de-humidify

Question

Find and discuss at least 3 different technologies that are able to de-humidify moist air. One of them should be based on the steam or gas refrigeration cycle (i.e. cooling of air below its Dew point and condensation removal). Don't worry about cooling the air, all you want is to dehumidify 20°C warm air to avoid condensation at 5°C For your cost calculation, you will need to assume a certain volume of air that you want to dehumidify. Then, you will need to estimate the energy required to reduce the humidity to an acceptable level, and determine the electricity cost associated with this energy. Finally, compare the 3 technologies in terms of economical efficiency. (Note: you should be calculating the required energy (electricity) for the gas or steam refrigeration cycle. You might not be able to direetly calculate the energy consumption for other dehumidifcinechnlogies. In that case, you will ned to find enerev estimates online.) Assumption and boundary conditions Calculation on the amount of water that needs to be removed from the moist air At leas paragraph of discussion on the working principle of each of the 3 technologies Schematic and T-s diagram of the refrigeration cycle Calculation of electricity input for the refrigeration cycle Cost comparison for the 3 technologies .

Explanation / Answer

A primary concern with dehumification-system design is energy consumption. The majority of the energy expended for dehumidification is for the removal of moisture from the air stream because condensing moisture out of air is a change in the state of the vapor.

Dehumidification is accomplished in a variety of ways. The method used often is dependent on the specific temperature and humidity conditions required in the space and the climate conditions at the site. The systems used in a specific application are chosen based on their effectiveness and efficiency in achieving the desired conditions. In addition, a life-cycle-cost analysis that compares first cost, operating costs, and maintenance costs is applied. Typical methods of dehumidification include the application of cooling, liquid and solid desiccants, and compression.

there are three ways to remove moisture from air

1) By cooling it to condensate the water vapour

2) By incresing its total Pressure

3) By passing the air over a desicant.

when air is chilled below its dewpoint temperature moisture condeses on the nearest surface.the amount of moisture removed depend on how cold the air can be chilled.

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