Fresh water production by membrane distillation (MD) using marine engine’s waste heat

2020 ◽  
Vol 42 ◽  
pp. 100860
Author(s):  
Rubina Bahar ◽  
Kim Choon Ng
Keyword(s):  
Fresh Water ◽  
Waste Heat ◽  
Membrane Distillation ◽  
Water Production

Diffusion Driven Desalination for Simultaneous Fresh Water Production and Desulfurization

2010 ◽  
Vol 2 (3) ◽  
Author(s):  
Jameel R. Khan ◽  
James F. Klausner ◽  
Donald P. Ziegler ◽  
Srinivas S. Garimella
Keyword(s):  
Fresh Water ◽  
Fluid Transport ◽  
Transport Model ◽  
Waste Heat ◽  
Feed Water ◽  
Low Grade ◽  
Water Production ◽  
Air Stream ◽  
Mass Transport Model ◽  
Air Streams

The diffusion driven desalination (DDD) process has been previously introduced as a process for distilling water using low-grade waste heat. Here, a configuration of the DDD process is introduced for simultaneously distilling water and scrubbing sulfur dioxide (SO2) out of heated air streams, which is also known as flue gas desulfurization (FGD). This novel DDD/FGD process utilizes the low-grade waste heat carried in industrial discharge air streams. There are many applications, where the industrial air discharge also contains SO2, and in order to utilize the waste heat for the DDD process, the SO2 must be scrubbed out of the air stream. The two major components of the DDD process are the diffusion tower and the direct contact condenser. In the present work, a thermal fluid transport model for the DDD/FGD process, that includes SO2 scrubbing, is developed. It is an extension of the heat and mass transport model previously reported for the DDD process. An existing laboratory scale DDD facility was modified and tested with SO2 in the air stream and with seawater as the feed water to the diffusion tower. The experimental investigation has been completed to evaluate the fresh water production and SO2 scrubbing potential for the DDD/FGD process. The experimental results compare favorably with the model predictions. Chemical analysis on the condenser water demonstrates the capability of the DDD/FGD process to produce high quality fresh water using seawater as the input feed water to the process.

Innovative Diffusion Driven Desalination Process

2004 ◽  
Vol 126 (3) ◽  
pp. 219-225 ◽  
Author(s):  
James F. Klausner ◽  
Yi Li ◽  
Mohamed Darwish ◽  
Renwei Mei
Keyword(s):  
Fresh Water ◽  
Direct Contact ◽  
Production Efficiency ◽  
Waste Heat ◽  
Feed Water ◽  
Water Production ◽  
Vapor Mixture ◽  
Steam Power ◽  
Low Humidity ◽  
Feed Water Temperature

An innovative diffusion driven desalination (DDD) process is presented, and its performance based on thermodynamic considerations is thoroughly explored. The desalination is driven by water vapor saturating low humidity air flowing through a diffusion tower. Liquid water is condensed out of the air/vapor mixture in a direct contact condenser. The desalination process is suitable for operation at low temperatures and may be driven by waste heat with low exergy. It is demonstrated that the DDD process can yield a fresh water production efficiency of 4.5% with thermal energy consumption of 0.56 kWh per kilogram of fresh water production based on a feed water temperature of only 50°C. An example is discussed in which the DDD process utilizes waste heat from a 100 MW steam power plant to produce 1.51 million gallons of fresh water per day.

Design and Development of a Small Multistage Flash Desalination System Using Aspen HYSYS

2019 ◽  
Author(s):  
Md. Islam ◽  
F. Banat ◽  
A. Baba ◽  
S. Abuyahya
Keyword(s):  
Solar Energy ◽  
Fresh Water ◽  
Waste Heat ◽  
Chamber Pressure ◽  
Water Production ◽  
Heating Source ◽  
Aspen Hysys ◽  
Temperature Heat ◽  
Process Reliability ◽  
Desalination Technology

Abstract Fresh water demands are increasing day by day because of growing population, industrialization, and increased living standards. Desalination technology has become a significant solution of fresh drinking water for many parts of the world. Lack of fresh water resources in dry environments has encouraged the establishment of desalination processes and developed technology to compensate for water scarcity. The MSF (multistage flash) desalination technique has received wide spread acceptance due to low temperature heat source (waste heat/inexpensive energy), simple construction high process reliability and simple maintenance. MSF typically has the highest water production cost among available desalination technologies, which can be reduced with using solar energy/co-generation. Since Abu Dhabi is in the solar belt region and is blessed with huge solar energy, MSF desalination can be powered by solar power in addition to industrial waste/fossil fuel energy, which will significantly reduce the cost as well as carbon, footprint. In this research, multistage flash desalination is modelled using ASPEN HYSYS package V8. We have designed each components of the system, mostly heating source, vacuum/flash chambers, heat exchangers and developed the whole system. Some parametric study, i.e. feed rate, top brine temperature, heat input, pressure, productivity etc. of multistage flash desalination system has been conducted in this research. Two case studies have been conducted and found a relation between feed flow rate and water production rate as well as chamber pressure with vapor formation. This design will help to build the pilot plant, do experimental test and validate the model.

Computational Method and Design of a Packed Bed Diffusion Tower for the Desalination of Seawater

2003 ◽  
Author(s):  
James F. Klausner ◽  
Mohamed Y. Darwish ◽  
Renwei Mei
Keyword(s):  
Power Plant ◽  
Production Rate ◽  
Fresh Water ◽  
Low Temperatures ◽  
Waste Heat ◽  
Packed Bed ◽  
Computational Procedure ◽  
Computational Method ◽  
Water Production ◽  
Water Production Rate

In a recent study, Klausner et al. [1] have described a diffusion driven process for desalinating seawater at low temperatures. The main advantage of the diffusion driven desalination (DDD) process is that low thermodynamic availability waste heat may be used to drive the process. When low pressure condensing steam from a 100 MW power plant supplies the heat to drive the DDD process, a fresh water production rate of 20 million gallons per day is feasible. This paper describes the computational procedure used to size the diffusion tower for a specified throughput.

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