Mitsui Engineering and Shipbuilding Company Limited

Kazuaki Ezawa

Takashi Kawaguchi

Kazumasa Fujiwara

Takamura Takigawa

Kounosuke Oku

Hiroo Inoue

Nobuyuki Tsutsui

Suminao Tomoyasu

Yuzuru Hamada

Problem to be Solved The present invention is made in view of the above-described circumstances. An object of the present invention is to provide a sunlight collecting system achieving suppression of power generation cost with the receiver which enables suppressing the manufacturing, transportation and construction costs, facilitating recovery work in the case of occurrence of a failure, and promptly recovering a heating medium circulating inside the receiver in an emergency. Means for Solving the Problem A sunlight collecting system in which sunlight is reflected by a plurality of heliostats onto a heat receiving portion having a heating medium circulated therein and then energy is drawn from the heating medium, characterized in that the sunlight collecting system is configured such that: the heat receiving portion is formed by assembling a plurality of modules, each of the modules includes an upper header, a lower header, and a plurality of heat receiving tubes connecting the two headers, and the heating medium circulates in the modules.

Solar light condensing system

The direction of a solar light tracking sensor is set easily with high accuracy. A solar light tracking guide () is installed on the optical axis () of the reflected light collected by a heliostat (). An optical telescope () is so attached to the rear end part of the guide () as to be aligned with the guide axis (C) of the guide (). The posture of the solar light tracking guide () is so adjusted that a cross provided in the field of view of the telescope () agrees with the center () of the light collection target position and fixed to the base (). Then, a solar light tracking sensor () is fastened to the rear end part of the guide () in place of the optical telescope ().

Solar light tracking sensor direction setting/measuring/re-adjusting method and solar light collecting device

For work in which reflecting mirrors (or facets ()) to be mounted on a heliostatcoincide with a pseudo toroid (), an adjustment method of, and a mounting posture measuring device for, accurately measuring mounting postures of the respective facets () are provided for performing mounting adjustment efficiently and simply. In a method of installing the reflecting mirrors (or the facets ()) constituting the heliostatfor sunlight condensation, each facet () is installed in such so that a reflected laser beam () reflected by the facetcan reach a virtual passage point () in a laser point measuring unit ().

Mounting position measuring device

An object is to provide a solar ray lighting device which is capable of reducing the blocking and the shadowing of beams of light reflected by heliostats and which is capable of fixing firmly and stably a heavy and large-sized center reflector. In a beam-down type solar ray lighting device, at least three supporting blocks are assembled together to form a pyramidal shape. In addition, an outer circumferential edge of the center reflector is fixed to the supporting posts so that the outer circumferential edge of the center reflector can internally touch the supporting posts.

Beam-down type solar ray lighting device

In a shield machine, there are provided an electromagnetic wave transmitting and receiving unit mounted on the top of the shield machine for radiating electromagnetic impulse wave toward an underground and for receiving the electromagnetic wave reflected from the underground, and a position sensor for collecting an information regarding the position of the electromagnetic wave transmitter and receiver unit. Data processing unit is provided for processing the signals from transmitter/receiver and the position sensor and sent through a transmission line. The data processing unit continuously displays the condition of the underground at the cutting face.

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Tokyo, Japan

Kazuaki Ezawa