Abstract: A steam-injected free-turbine type of gas turbine is disclosed. In order to avoid the necessity of redesigning the compressor/core turbine, the shaft of the core turbine is modified to provide additional load output. As steam is injected into the system the resulting excess power of the core turbine is taken out of the system by coupling the compressor output shaft with a load. Thus, the core turbine operates as a single shaft turbine in addition to the existing power turbine. A control provides control of the load output of the two turbine output shafts so that the compressor/turbine stays in the matched operating domain.

Abstract: An improved procedure for cold start-up of closed loop boiler set and Cheng cycle system wherein the venting step, the boiler swelling problem and blowdown step of the conventional start-up are eliminated by use of an external pressure source to increase the operating pressure in the evaporator section which minimizes premature phase change and accompanying volume increase.

Abstract: A control system is disclosed for controlling Cheng dual-fluid cycle engines over a wide operating range to maintain high efficiency under partial load conditions.

Abstract: An improved shutdown procedure, which minimizes the potential for steam condensation in the superheater section, combustion chamber and turbines during the coast to halt of the engine maintains high temperatures until all the steam has passed through the system.

Abstract: A control system is disclosed for controlling Cheng dual-fluid cycle engines over a wide operating range to maintain high efficiency under partial load conditions.

Abstract: A control system is disclosed for controlling Cheng dual-fluid cycle engines over a wide operating range to maintain high efficiency under partial load conditions.

Abstract: A composite membrane structure is used in a distillation apparatus and method. The composite membrane separates a distilland and a distillate, such as salt water and fresh water. The composite membrane comprises a thin lyophobic microporous layer or membrane and a thin lyophilic layer or membrane. Evaporation and condensation takes place within the micropores of the lyophobic membrane. The lyophilic layer prevents intrusion of distilland into the pores of the lyophobic layer.

Abstract: A composite membrane separates a distilland and a distillate, such as salt water and fresh water. The composite membrane comprises a thin lyophobic microporous layer or membrane and a thin lyophilic layer or membrane on both sides of the lyophobic membrane or on the distillate side. Evaporation and condensation takes place within the micropores of the lyophobic membrane. The lyophilic layer on the distilland side prevents intrusion of distilland into the pores of the lyophobic layer. The lyophilic layer on the distillate side changes the surface curvature of the liquid/vapor interface in a manner which enhances the distillation rate through the membrane.

Abstract: Apparatus and method for improved thermal membrane distillation utilizes a composite membrane comprised of a microporous lyophobic layer having deposited thereon an essentially nonporous lyophilic coating.

Abstract: A control system is disclosed for controlling Cheng dual-fluid cycle engines over a wide operating range to maintain high efficiency under partial load conditions.

Abstract: The steam control valve for a waste heat boiler in a Cheng Dual Fluid Cycle (DFC) engine is located between the evaporator and superheater sections. In this location it maximizes the temperature of the superheater steam to provide maximum waste heat recovery.

Abstract: A method and device are disclosed for removing sulfur containing contaminents from a combustion product exhaust. The removal process is carried out in two stages wherein the combustion product exhaust is dissolved in water, the water being then heated to drive off the sulfur containing contaminents. The sulfur containing gases are then resolublized in a cold water trap to form a concentrated solution which can then be used as a commercial product.

Abstract: A control system is disclosed for controlling Cheng dual-fluid cycle engines over a wide operating range to maintain high efficiency under partial load conditions.

Abstract: A composite membrane structure is used in a distillation apparatus and method. The composite membrane separates a distilland and a distillate, such as salt water and fresh water. The composite membrane comprises a thin lyophobic microporous layer or membrane and a thin lyophilic layer or membrane. Evaporation and condensation takes place within the micropores of the lyophobic membrane. The lyophilic layer prevents intrusion of distilland into the pores of the lyophobic layer.

Abstract: A regenerative, parallel-compound, dual-fluid heat engine is set forth wherein important engine parameters are specified and linked to each other in a manner which maximizes engine efficiency and throughput for an engine of this type.

Abstract: A regenerative, parallel-compound, dual-fluid heat engine is set forth wherein important engine parameters are specified and linked to each other in a manner which maximizes engine efficiency and throughput for an engine of this type.

Abstract: An improved system of transferring heat energy from a high temperature fluid to a low temperature fluid is described. A countercurrent heat exchanger is employed in which heat transfer fluids undergo one or more thermodynamic transitions at various pressures by employing conventional heat exchangers having additional components. It has been determined that by employing this system of the present invention under a critical choice of design parameters, a substantially greater amount of heat energy can be transferred per unit area of the heat exchanger than was possible by conventional techniques.