This work is an extension and modification of the novel thermal cycle reported in the study “Techno-Economic Evaluation of a Novel Thermal Cycle for Electricity Generation and Fresh Water Production From Solar Ponds.” For low temperature power generation, such as the case of solar ponds or a field of solar flat plate collectors (60–90 °C), it is a common practice to use an organic Rankine cycle. The novel cycle uses water vapor as a working medium under pressure values lower than atmospheric. This is achieved by a turbovapor generating unit, a conventional low-pressure steam turbine, and a condenser working in an open cycle. Such a plant has a low thermal efficiency which approaches 12%, because of the small temperature range between evaporator and condenser (80–30 °C). The ratio of fresh water to electric power is also fixed for a certain temperature range (e.g., 14 tons/MW h for temperatures of 80 °C evaporator and 30 °C condenser). To increase the thermal utilization of the available heat flux and to achieve a variable fresh water production, a conventional multistage flash evaporation plant (MSF plant) is incorporated between the evaporator and condenser. The thermodynamic analysis of the plant shows that the thermal utilization of the available energy may reach 90%, while the amount of fresh water could be raised from 14 tons/MW h to 300 tons/MW h, for the same temperature range. This system has the advantage of being self-sufficient, yielding a net electric power after having supplied its own needs of pumping power.

References

References
1.
Mobarak
,
A.
,
1986
, “
Techno-Economic Evaluation of a Novel Thermal Cycle for Electricity Generation and Fresh Water Production From Solar Ponds
,” Classified Report DRTPC Publication No. 221–86, Cairo University and Patent No. 176255, Patent Office, Egyptian Academy of Scientific Research.
2.
Kumar
,
P. V.
,
Kaviti
,
A. K.
,
Prakash
,
O.
, and
Reddy
,
K. S.
,
2012
, “
Optimization of Design and Operating Parameters on the Year Round Performance of a Multi-Stage Evacuated Solar Desalination System Using Transient Mathematical Analysis
,”
Int. J. Energy Environ.
,
3
(
3
), pp.
409
434
. Available at: http://www.oalib.com/paper/2082988
3.
Joseph
,
J.
,
Saravanan
,
R.
, and
Renganarayanan
,
S.
,
2005
, “
Studies on a Single-Stage Solar Desalination System for Domestic Applications
,”
Desalination
,
173
, pp.
77
82
.10.1016/j.desal.2004.06.210
4.
Klemens
,
S.
,
Eugenia Vieira
,
M.
,
Faber
,
C.
, and
Moeller
,
C.
,
2001
, “
Solar Thermal Desalination System With Heat Recovery
,”
Desalination
,
137
, pp.
23
29
.10.1016/S0011-9164(01)00200-4
5.
Kalogirou
,
S. A.
,
2005
, “
Seawater Desalination Using Renewable Energy Sources
,”
Prog. Energy Combust. Sci.
,
31
, pp.
242
281
.10.1016/j.pecs.2005.03.001
6.
Abdel-Rehim
,
Z. S.
, and
Lasheen
,
A.
,
2007
, “
Experimental and Theoretical Study of a Solar Desalination System Located in Cairo, Egypt
,”
Desalination
,
217
, pp.
52
64
.10.1016/j.desal.2007.01.012
You do not currently have access to this content.