Masters Theses


"The object of this investigation was to study desalination using evaporation through porous membranes and to estimate the economic potential of the method. The major factors affecting the economics were: 1. The saline water temperature into the evaporator, tsl; 2. the temperature driving force in the evaporator, DF; 3. the temperature driving force in the heat exchanger, DTEX; and 4. the saline water temperature leaving the evaporator, ts2. The optimum conditions based on cost of water product were studied by calculating water costs under a wide range of conditions. for any given set of variables tsl, DT, and ts2, the optimum value of DTEX can be found by setting the partial derivative of water cost with respect to DTEX equal to zero. The optimum values of DT and ts2 are found by using a numerical integration process from the hot end of the evaporator-condenser to the cold end. Computer calculations were used to study process economics under a number of possible conditions. The optimum conditions could be determined by inspection of the computer print out. Calculations were also made to determine the effect of a number of cost factors on the optimum water cost. Under conditions believed to be attainable, the cost of water is estimated to be as low as 0.46 {dollar}/1000 gallons using this method of evaporation"--Abstract, page ii.


Findley, Marshall E., 1927-1991

Committee Member(s)

Johnson, James W., 1930-2002
Saad, Afif H.


Chemical and Biochemical Engineering

Degree Name

M.S. in Chemical Engineering


University of Missouri--Rolla

Publication Date



xvi, 78 pages

Note about bibliography

Includes bibliographical references (pages 100-101).


© 1969 Chia-Chang Liu, All rights reserved.

Document Type

Thesis - Open Access

File Type




Subject Headings

Saline water conversion
Saline water conversion -- Costs
Water -- Purification
Evaporation -- Mathematical models

Thesis Number

T 2268

Print OCLC #


Electronic OCLC #