Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE credits
This paper is the development of a new method of obtaining water based on dehumidification method.
Water privation affects more than 884 million people in over 43 countries. According to the WHO, there is a minimum amount of water needed in order to have a low concern in health due to this issue.
For obtaining water, there are some technologies in development, being the most advanced ones osmosis and humidification-dehumidification. The method that this paper is going to study is very similar to humidification-dehumidification process.
Moist air formulas, complemented with cooling machine cycle, have been used to create a mathematical model based on a previous scheme design of the machine. Matlab software has been chosen to accomplish this duty.
Process calculations have been made from the hypothesis of 100 litres per person and day for a population of 500 people.
Results obtained are interesting for some situations. It has been proved that it can be placed anywhere (even in the middle of the desert), but the most ideal situation is next to the sea in warm places. For this reason, the study has been carried out in Valencia, Spain.
Mean cost for water is 0,1359 kWh/kg water. Power installed is 1000kW, and mean power use is 200kW. Amount of water obtained is variable during the year, being the biggest one in summer and the lowest in winter. Because of this, storage is needed.
For future studies, the performance in the compressor and the heat exchanger should be improved, in order to reach the theoretical minimum energetic cost of 0,08kWh/litre.
2016. , 66 p.
Water, Sustainable Development, Psychrometrics, Thermodynamics, Energy Systems.