ABSTRACT:

On the basis of site tests with the beat recovery system using wave power, it has been possible to evaluate energy conversion efficiency, operation, control and safety of the system. 1) The energy conversion efficiency at each stage has been determined by improving estimates of incident wave patterns. 2) As a result of our experiments, the following data were obtained: Final efficiency: 12-30% Resulting heat energy: 10-30 kW/10 m 3) We are able to predict that practical operation of this system is feasible.

INTRODUCTION

In this study, energy conversion efficiency, operational control and safety has been evaluated by means of site verification experiments (1987, 1988) with the aim of putting the heat recovery system using wave power to practical use. The heat recovery system using wave power converts the energy of air flow generated in an air chamber by converting it into heat through the use of a well" s turbine and a heat generation device installed in the upper part of the chamber. The hot water produced can be stored easily and temperature fluctuation controlled. Using a simulation program of thermodynamic wave motion (1987, 19B5) and comparing it with actual measured data, the applicability of the program was verified. Together with the evaluation of conversion efficiency, an examination of methods for the control and improvement of the system was performed. Through these evaluations, a view to putting the system into practical operation was obtained.

FIELD EXPERIMENTS AND DATA ANALYSIS

Field Experiments The field experiments were conducted by installing a concrete air chamber of 13.3 m in width, 7.0 m in depth and 14.4 m in height, a heat exchanger and an energy measurement system in front of an existing breakwater at Neya Fishing Port in Niigata Prefecture in the winter of 1987, as shown in Figure 2.

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