STUDY OF WATER DESALINATION BY SOLAR ENERGY USING HUMIDIFICATION- DEBUMIDIFICATION PROCESSES
AHMED MOHAMED SOLMAN HASSAN;
Abstract
The most important conclusions of the present work are;
1- The mathematical model presented in this work simulates the actual HDD process efficiently. The maximum deviation between the present model and other published less than (±7%). Good agreement between the theoretical model results and those obtained experimentally shows the validity of the model.
2- The productivity of the unit which consists of a humidifier, dehumidifier, solar air heater, solar water heater, and hot water storage tank can be increased by
(i) 25% above the configuration without hot water storage tank.
(ii) 67% above the configuration that consists of a humidifier, dehumidifier and solar water heater only (water open loop).
(iii) 78% above the configuration that consists of a humidifier, dehumidifier
and solar water heater only (water closed loop).
(iv) 118% above the configuration that consists of a humidifier, dehumidifier and solar air heater only.
3- The system productivity can be increased by increasing the surface area of solar water heater instead of increasing the surface area of solar air heater. Using both water heater and air heater is better than using each of them individually.
4- Increasing water flow rate through the system will be decreasing the productivity.
However increasing airflow rates through the •system will be increasing the productivity. Or increasing the ratio of water flow rate to airflow rate will decrease the productivity of the system.
5- Increasing the cooling water flow rates and decreasing the inlet cooling water temperature to the dehumidifier will increase the productivity.
6- As the solar intensity increases the productivity of system will increase.
7- The ambient temperature and wind speeds have small effect on the productivity.
1- The mathematical model presented in this work simulates the actual HDD process efficiently. The maximum deviation between the present model and other published less than (±7%). Good agreement between the theoretical model results and those obtained experimentally shows the validity of the model.
2- The productivity of the unit which consists of a humidifier, dehumidifier, solar air heater, solar water heater, and hot water storage tank can be increased by
(i) 25% above the configuration without hot water storage tank.
(ii) 67% above the configuration that consists of a humidifier, dehumidifier and solar water heater only (water open loop).
(iii) 78% above the configuration that consists of a humidifier, dehumidifier
and solar water heater only (water closed loop).
(iv) 118% above the configuration that consists of a humidifier, dehumidifier and solar air heater only.
3- The system productivity can be increased by increasing the surface area of solar water heater instead of increasing the surface area of solar air heater. Using both water heater and air heater is better than using each of them individually.
4- Increasing water flow rate through the system will be decreasing the productivity.
However increasing airflow rates through the •system will be increasing the productivity. Or increasing the ratio of water flow rate to airflow rate will decrease the productivity of the system.
5- Increasing the cooling water flow rates and decreasing the inlet cooling water temperature to the dehumidifier will increase the productivity.
6- As the solar intensity increases the productivity of system will increase.
7- The ambient temperature and wind speeds have small effect on the productivity.
Other data
| Title | STUDY OF WATER DESALINATION BY SOLAR ENERGY USING HUMIDIFICATION- DEBUMIDIFICATION PROCESSES | Other Titles | دراسة تحلية المياه بالطاقة الشمسية باستخدام عمليات الترطيب وازالة الترطيب | Authors | AHMED MOHAMED SOLMAN HASSAN | Issue Date | 2002 |
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