Page 386 - Handbook of Energy Engineering Calculations

can be tapped from coastal waters by building dams that entrap the water at
high tide and release it back to the sea at low tide. Power can then be
obtained by hydraulic turbines from both the in- and the outflows of the
water. The amount of energy available is very large but only in a few parts of
the world. An accompanying Calculation Procedure shows how to compute

the total energy and average power of a modulated single-pool tidal system.

ANALYSIS OF AN OTEC CLAUDE CYCLE EFFICIENCY

AND FLOW RATES

A Claude cycle plant, Fig. 1a, producing 100 kW (gross) operates on the
conditions of Fig. 1b. The turbine has a polytropic efficiency of 0.80 and the

turbine-generator has a combined mechanical-electrical efficiency of 0.90.
3
Calculate the surface and deep-water flow rates in kg/s and m /s, and the
gross cycle and plant efficiencies.

FIGURE 1a Flow diagram and schematic of a Claude (open-cycle)
OTEC power plant.