TY - JOUR
T1 - Effectiveness of a built-in air duct desalination machine with absorption process
AU - Liang, Shen
AU - Ma, Xinglong
AU - Zhang, Nan
AU - Zheng, Hongfei
N1 - Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/5/5
Y1 - 2021/5/5
N2 - Because there is no mature potable desalination machine specifically designed to provide a sustainable water supply to vessels, this paper proposes a built-in air duct desalination machine based on humidification and dehumidification processes. The machine is powered by waste heat exhausted from the vessel's diesel engines. The humidifier and dehumidifier are stacked so that the structure is compact. The dehumidification process is fulfilled based on the freshwater absorption process. The operating principle and structural design of the machine are introduced. A series of steady state experiments are conducted to assess the effects of heating temperature, hot seawater spray flow rate, and cold water spray flow rate on freshwater production and gained output ratio. The results show that the machine can obtain a freshwater productivity of 19.6 kg/h with gained output ratio of 0.53 when the heating temperature is 90 °C, the hot water spray flow rate is 1 t/h, and the cold water spray flow rate is 1.2 t/h. The freshwater production per volume unit per hour can reach up to 10.5 kg/(m3h). Owing to its superimposed structure, the rising driving force of the water vapor can be fully utilized, and 60% of the normal water productivity can be achieved when the fan is turned off.
AB - Because there is no mature potable desalination machine specifically designed to provide a sustainable water supply to vessels, this paper proposes a built-in air duct desalination machine based on humidification and dehumidification processes. The machine is powered by waste heat exhausted from the vessel's diesel engines. The humidifier and dehumidifier are stacked so that the structure is compact. The dehumidification process is fulfilled based on the freshwater absorption process. The operating principle and structural design of the machine are introduced. A series of steady state experiments are conducted to assess the effects of heating temperature, hot seawater spray flow rate, and cold water spray flow rate on freshwater production and gained output ratio. The results show that the machine can obtain a freshwater productivity of 19.6 kg/h with gained output ratio of 0.53 when the heating temperature is 90 °C, the hot water spray flow rate is 1 t/h, and the cold water spray flow rate is 1.2 t/h. The freshwater production per volume unit per hour can reach up to 10.5 kg/(m3h). Owing to its superimposed structure, the rising driving force of the water vapor can be fully utilized, and 60% of the normal water productivity can be achieved when the fan is turned off.
KW - Built-in air duct
KW - Desalination
KW - Freshwater absorption
KW - Humidification and dehumidification (HDH)
KW - Stacked structure
UR - http://www.scopus.com/inward/record.url?scp=85100634095&partnerID=8YFLogxK
U2 - 10.1016/j.applthermaleng.2021.116708
DO - 10.1016/j.applthermaleng.2021.116708
M3 - Article
AN - SCOPUS:85100634095
SN - 1359-4311
VL - 189
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
M1 - 116708
ER -