Abstract: The present disclosure relates to methods for starting and rapidly decelerating a turbomachine in a power generation system that utilizes a supercritical fluid in a closed cycle.

Abstract: A heating system combines a heat source for applying heat energy to a supply of heat transfer fluid including a polyol having five or less pendant hydroxyl groups and a polydimethylsiloxane and a pump that moves the heat transfer fluid through conduits to a heat exchanger. In one configuration, the heating system has a primary circuit including the heat source, delivery line, pump, heat exchanger and return line, and a sub-circuit including a bypass line interconnecting the delivery line and the return line to provide a flow path bypassing the heat source. The sub-circuit includes the bypass line, a portion of the delivery line, the pump, the heat exchanger, and a portion of the return line. Control valves and a control mechanism direct the flow of fluid between the primary and sub-circuit. The heat transfer fluid is a blended mixture of 5-15% glycerin, 20-40% propyl glycol and 45-75% silicone.

Abstract: A method for regulating a temperature in a plurality of rooms (3) of a building, comprising steps of detecting a first ambient temperature measurement (TaI) in a first room (3a) with use of a thermostat (5) destined to command functioning of a first heat-regulating device (8a) mounted on a first radiator (4a) arranged in the first room (3a), in a correlated way with the first ambient temperature measurement (TaI) and with a first set value (Tset1) of a desired temperature in the first room (3a), detecting a first proximal temperature (Tpr1) by means of a first sensor (9a) arranged in proximity of the first radiator (4a), detecting a second ambient proximal temperature measurement (Tpr2) in a second room (3b) by means of a second sensor (9b) arranged in proximity of a second radiator (4b), correlating the measurement of the second proximal temperature (Tpr2) with a second set value (Ofs2) for a second heat-regulating device (8b) and also at least with the first proximal temperature measurement (Tpr1) in order

Abstract: A temperature regulation system operatively associated with a boiler is provided, including: a temperature sensor sensing hot-water restoration temperature of a space to be heated; a flow controller controlling the amount of restored hot water in the space; a hot-water restoration-flow detector detecting the amount of restored hot water flowing through a hot-water restoration pipe; a key input unit used to set hot-water restoration temperature and a minimum amount of restored hot water; and a controller controlling a flow controller so that when hot-water restoration temperature of a space sensed by a temperature sensor is equal to hot-water restoration setup temperature set by an operator, the amount of water required to maintain the hot-water restoration setup temperature flows into a hot-water restoration pipe.

Abstract: A regulating insert for mounting in valves includes a dynamically flow regulating body, with the body having a first housing that is disposed within a second housing. A coil spring is arranged about an axis thereof, and a first end of the coil spring engages a slidable bottom cup provided with at least one inlet opening for liquid in its wall. The opening has an adjustable flow area. The second end of the coil spring opposite the first end engages a partly closed end of the second housing. The partly closed end has a cylindrical opening that provides a seat for a valve cone situated within the second housing. The position of the valve cone is regulated by first means via an activation means.

Abstract: A control system for a gas water heater including a fuel rate control valve, a water flow switch to control the fuel rate valve, an inlet water temperature switch to reduce fuel flow when inlet temperature is high, a temperature switch at the water outlet to shut off fuel at a high temperature and a temperature sensor at the water outlet to regulate the fuel valve.

Abstract: A method and control system are disclosed for operating an integrated heating system for space heating and tankless domestic hot water heating utilizing an infrared burner module and heat exchanger coil. When the system is below 100% capacity, the burner is pulsed using a constant pulse period and varying the on-pulse width to vary capacity, or where a minimum on-pulse width is maintained the off-pulse width is varied to vary capacity.

Abstract: A fluid flow rate detector for controlling an electric switch in a circuit for regulating fluid flow, the detector including inner and outer portions where fluid is received in the inner portion and flows out into the outer portion through perforations in the inner portion. A magnetic slug is disposed in the inner portion and moves away from a home position in the direction of fluid flow when the flow exceeds a predetermined rate. The slug then is deposited in a zone between the perforations and an end cap of the inner portion so as to permit the flow of fluid to occur at a substantially unimpeded rate. A magnetically activated electric switch responds to the movement of the slug and opens and closes an electric switch in response to the fluid flow rate. The detector can be used in a system dually providing a source of hot water to a hot water sink and to a source of heat.

Abstract: A fluid flow sensor, comprising a tubular element having a greater diameter than and vertically mounted on a pipe for serially interconnecting two portions of this pipe. One portion is connected to the upper end of the tubular element while the other portion is connected to its lower end. A magnetic piston is slidably mounted within the tubular element and is therefore free to move along it. A by-pass conduit interconnects the lower portion of the pipe with the upper portion of the pipe. The piston moves upwardly in the tubular element when the fluid flows. Fluid flows from the portion of the pipe connected at the lower end of the tubular element to the one connected at its upper end through the by-pass. The piston moves downwardly by gravity to the lower end of the tubular element when the fluid stops flowing. A coil wound around a portion of the tubular element produces in electrical signal when the piston moves in the tubular element.

Abstract: A control unit for a gas-fired water heater comprises a resiliently-loaded main valve for controlling gas flow to a gas burner of the heater, the main gas valve being opened and closed by a flexible diaphragm exposed to pressure of water flowing through the water heater. A subsidiary gas valve located upstream in the gas supply of the main gas valve has a permanently open by-pass and is actuable by a user operated control which also adjusts the resilient loading of the main gas valve in such manner as to adjust the rate of water flow and the rate of gas flow to provide hot water of a required temperature and at a required rate of flow.

Abstract: A venturi operated water flow responsive valve controls the flow of gas to the burner of an instantaneous water heater by controlling the flow of gas between chambers of a main control valve. The venturi operated valve is of the diaphragm type and the gas flow is controlled as a function of water flow rate.