Abstract: An evaporating apparatus includes an evaporator (E) for converting a liquid into vapor and a preheater (2) for heating the liquid before it is fed to the evaporator (E). A pump (6) for feeding the liquid to the preheater (2) and another pump (8) for pressurizing the liquid passing from the preheater (2) to the evaporator (E) are provided, where the former maintains the liquid at a saturation pressure with respect to a temperature slightly higher than a saturation temperature (t.sub.o) at the preheater outlet, and the latter serves to raise the liquid pressure to a saturation pressure with respect to a desired evaporation temperature (t.sub.2). Rate of flow of a heating medium for the preheater (2) is controlled so that its temperature (t.sub.w3) is slightly higher than a liquid preheater outlet temperature (t.sub.ex). Thus, in the preheater (2), the liquid temperature (t.sub.ex) is maintained lower than saturation temperature (t.sub.o), ensuring a greater amount of heat transfer by subcool boiling.

Abstract: A heat recovery system including a closed working fluid loop constituted by connecting an evaporating apparatus supplied with warm waste water, a steam turbine having an output shaft to be coupled to the load, and a condensing apparatus supplied with cooling water, works on the basis of a Rankine cycle and utilize non-azeotropic mixture as the working fluid.

Abstract: A heat recovery system including a closed working fluid loop constituted by connecting an evaporating apparatus supplied with warm waste water, a steam turbine having an output shaft to be coupled to the load, and a condensing apparatus supplied with cooling water, works on the basis of a Rankine cycle and is adapted to utilize a non-azeotropic mixture as the working fluid.

Abstract: A heat recovery system including a closed working fluid loop constituted by connecting an evaporating apparatus supplied with warm waste water, a steam turbine having an output shaft to be coupled to the load, and a condensing apparatus supplied with cooling water, works on the basis of a Rankine cycle and utilize a non-azeotropic mixture as the working fluid.

Abstract: A magnetic recording medium which comprises a non-magnetic support, a magnetic recording layer formed on one side of the support, and a back coat layer formed on the other side. The back coat layer is made of a dispersion, in a binder resin, of non-magnetic particles on which there is adsorbed carbon black having an average size not larger than 100 millimicrons and a specific surface area not less than 30 m.sup.2 /g.

Abstract: A magnetic recording medium in the form of a tape or a disk comprising a non-magnetic support and a magnetic recording layer formed on at least one side of the support. The magnetic recording layer is made of a dispersion, in a resin binder, of an acicular magnetic powder, a magnetic ferrite powder of a hexagonal system having an axis of easy magnetization along the c axis, and titanium monoxide powder having an average size of from 0.01 to 5 micrometers. The titanium monoxide powder is used in an amount of from 0.1 to 20 wt % based on the total of the acicular magnetic powder and the magnetic ferrite powder.

Abstract: This invention relates to a time-division transmission method for a plurality of terminals connected to a looped transmission line, in which a plurality of slots being provided with regions, where three kinds: "Free", "Busy" or "Neutral" of access control information are set, are made to circulate on the transmission line, so that when the transmission apparatus at the terminal having data to be transmitted receives a slot of "Free", a necessary number of subsequent slots to the slot of "Free" are continuously used to carry out data transmission, the access control information at the slot in use is changed to "Busy", the access control information of a slot at the head of the slots not used is set to "Free", and an access control information of a slot subsequent to the above slot is set to "Neutral".

Abstract: A heat recovering device comprising an oil injection type screw expander having its output shaft connected to a load, such as a generator, an evaporator using waste heat as a heat source to evaporate a working medium so as to produce working medium vapor to be fed to the expander, a condenser for condensing the working medium vapor discharged from the expander, a working medium circulating pump for circulating the working medium within a system comprised of the condenser, evaporator and expander, an oil circulating pump for feeding oil to the expander, and a heater for heating oil to be fed to the expander to a higher temperature than the working medium vapor temperature. The device is characterized in that the heated oil is injected into the expander in such a manner that the working medium vapor and the heated oil come in direct contact with each other in the expander, thereby superheating the working medium vapor.

Abstract: A plate type evaporator comprising a plurality of vertically extending plate elements assembled face-to-face to define therebetween alternate channels for a heating medium and for a liquid to be evaporated. In order to accelerate the nuclear boiling of the liquid in the liquid channels, the heat transfer surface of each plate element has a plurality of vertically extending transversely spaced ridges projecting toward the associated liquid channel, such ridges being in contact with the heat transfer surface of the opposed plate element to provide areas of contact assisting in the evolution of vapor bubbles and divide the liquid channel into narrow sections assisting in the generation of vapor, such sections also assuring that even in deeper places in the liquid channel, vapor bubbles will be generated without yielding to the liquid pressure; alternatively, each plate element has a porous layer formed on its heat transfer surface facing the liquid channel.

Abstract: The disclosed FSK demodulator includes a digital PLL for converting an FSK modulated input signal with two different frequencies to rectangular waveforms having durations as determined by those frequencies, two reversible N bit counters for counting clock pulses to determine instantaneous duty factors in the form of N parallel bits of the waveforms for each pulse repetition period, and a read only memory for multiplying alternate outputs, except for the sign bit, from the counters by a ratio of the lower to the higher frequency of the input signal. Then, a digital first-order low-pass filter removes a high frequency component from the output of the read only memory, resulting in a demodulated binary signal. The binary signal may be produced by setting or resetting a FLIP-FLOP when the sign bit from each of the counters is respectively a binary ONE or ZERO. Alternatively, another reversible M bit counter (when M>N) may count the clock pulses to equal the output from the read only memory.

Abstract: A plate type evaporator comprising a plurality of vertically extending plate elements assembled face-to-face to define therebetween alternate channels for a heating medium and for a liquid to be evaporated. The plate elements have porous layers formed on their opposed heat transfer surfaces functioning as the channels for the liquid to be evaporated. The porous layers are utilized as nuclear boiling accelerating members to improve the capability of evaporating liquid on the boiling heat transfer surfaces.

Abstract: A plate type evaporator comprising a plurality of vertically extending plate elements assembled face-to-face to define therebetween alternate channels for a heating medium and for a liquid to be evaporated. In order to accelerate the nuclear boiling of the liquid in the liquid channels, the heat transfer surface of each plate element has a plurality of vertically extending transversely spaced ridges projecting toward the associated liquid channel, such ridges being in contact with the heat transfer surface of the opposed plate element to provide areas of contact assisting in the evolution of vapor bubbles and divide the liquid channel into narrow sections assisting in the generation of vapor, such sections also assuring that even in deeper places in the liquid channel, vapor bubbles will be generated without yielding to the liquid pressure; alternatively, each plate element has a porous layer formed on its heat transfer surface facing the liquid channel.

Abstract: A structure of fluid condensing and heat conducting surface of the condenser characterized in that completely recessed grooves for collecting fluid are provided on said surface integrally therewith, wherein the distance between the centers of radii of rounded corners of said groove is made less than 3 mm.