Abstract: A system for automatically controlling the quantity and quality of steam to a plurality of constant demand customers has a steam generating source, and pressure regulator means and steam mass flow measurement means between each constant demand customer and the steam generating source.

Abstract: An outdoor unit comprises a combustion unit for presenting combustion heat, a heating medium heating part for heating the heating medium with the combustion heat to vary in phase from liquid to gas, and a heating medium transferring part. A plurality of indoor units each have an indoor heat exchanger and a required heating capacity detecting part for detecting a required heating capacity in a region to be heated required for the indoor heat exchanger. The detecting part comprises a room temperature setting part, a room temperature detector, and a required heating capacity data output part for delivering required heating capacity data in the region to be heated depending on the difference between the preset room temperature and the detected room temperature. The distributing part couples the plural indoor units parallel to the outdoor unit so as to form individual enclosed heating medium circulation cycles.

Abstract: A low cost-high efficiency steam heating system is disclosed. A pressure sensing switch in the radiation device triggers a timer when a predetermined pressure is achieved in the radiator. The timer is interposed between a thermostat and boiler-burner assembly so as to deactivate the boiler-burner for predetermined periods until the set point of the thermostat is reached.

Abstract: A water heater and distiller apparatus is provided in which condensing steam is the distilling portion of the apparatus giving up its latent heat to water which is being heated in the water heating portion of the apparatus. In a preferred embodiment, products of combustion which are used to boil water in the distiller boiler, are later passed in heat exchange relation with the water heating tank in the water heating portion of apparatus. It is believed that the present apparatus is both energy efficient and uncomplicated as compared to the prior art.

Abstract: A transport mechanism for heat in housing includes the use of liquid media such as warm water and gaseous media such as heated air. For either of these heat transport media, a circulation pump or a blower is necessary with the exception of special cases. This invention relates to a heat transport method where the heat media is evaporated by a steam generator which is fed up to an objective heat emitting device through steam tubes. At this heat emitting device, the steam is condensed for utilization of the latent heat being obtained by this condensation to space heating, water heating and so on. Further, the condensed heat media liquid is once stored in a condensed liquid vessel which is under atmospheric pressure, and the heat media liquid inside the condensed liquid vessel is circulated into the steam generator via steam tubes by stopping the heating of the steam generator and utilizing the pressure reduction being caused inside the steam generator.

Abstract: Steam heating equipment for the interior of a room recirculating heating fluid after it has condensed in a heat emitter for heating the room. The heat media liquid is sealed in an enclosed steam generator which supplies steam to the heat emitter via a steam conducting pipe. The heat media liquid which has condensed in the emitter by giving up its latent heat to the ambient air, is stored inside a condensed liquid vessel which is under atmospheric pressure. When the heat media liquid inside the steam generator has been depleted to a certain level, the heating of the steam generator is stopped. The heat media liquid which has previously been stored inside the condensed liquid vessel is then recirculated into the steam generator through a liquid circulation pipe which is separate from the aforesaid steam conducting pipe, by utilizing a pressure reduction action within the steam generator causing its cooling.

Abstract: A system for draining condensate from a temperature regulated, steam operated heat exchanger. A buffer tank having a volume at least equal to that of the steam compartment is connected to the steam side of the heat exchanger, and a drain line extends from the bottom of the buffer tank to a condensate collection pipe located above the buffer tank. The drain pipe from the heat exchanger includes an air venting device and a control pipe having a non-return valve linking the top of the tank to the steam side of the heat exchanger. During low load operation of the heat exchanger, air from the top of the buffer tank can flow back to the steam compartment of the heat exchanger to equalize the pressures and permit drainage of the condensate even during low load conditions.

Abstract: Apparatus for providing for low pressure operation of a high pressure boiler including a low pressure relief valve mounted on the boiler and adapted to release steam from the boiler at a steam pressure lower than the pressure developed during high pressure operation of the boiler. An electrically operated control valve is provided for selectively connecting the low pressure relief valve to the boiler, and the valve is controlled for precluding connection of the low pressure relief valve to the boiler until the steam pressure in the boiler drops below the relief pressure of the low pressure relief valve.

Abstract: A building heating system with a plurality of steam radiators is provided with a control unit for the steam boiler. The control unit receives signals representative of the outside temperature and the pressure of the steam in the feeder conduit. The control unit shuts off the boiler when the steam pressure in the feeder conduit exceeds a predetermined value corresponding to a given measured outside temperature. After the pressure has decreased to a value below the predetermined value for the measured temperature, the control unit restarts the boiler. Another control unit receives signals representative of the condensate temperature and the pressure in the return conduit. This control unit operates a vacuum pump in the return line and assures that the vacuum pressure in the return line is less than that which causes the condensate to vaporize.

Abstract: This invention relates to a system for reclaiming or recovering heat which would otherwise be lost from a heating plant. The invention accordingly relates to a heating plant incorporating a plurality of boilers, including a stand-by boiler, there being means for supplying fuel and air to at least one of said boilers, except for the stand-by boiler, and flue gas exhaust ducts associated with each of such boilers. The improvement according to the invention is a waste heat recovery system wherein the flue gas exhaust duct from said at least one boiler is operatively connected to the stand-by boiler for the circulation of hot flue gases therethrough in contact with its heat exchange surfaces thereby to effect the heating of water passing through the stand-by boiler thereby to recover a portion of the heat energy in the flue gases.

Abstract: A heat control system designed to control individual radiators in a heating system where there is only one boiler supplying steam, or one heated fluid source such as a utility steam supply, and where there is no separate condensate return line; each radiator or riser or both may be individually controlled by devices at and external of the radiator without the need for reconstructing the heating system itself or inserting any mechanical device within the system which will block return of condensates; there is an on-off control valve between the radiator and its vent valve and controllable preferably by a room thermostat; additional fuel saving controls may include a device that is responsive to the radiator becoming heated to a desired level or internal pressure in the radiator to provide an additional control for the control valve.

Abstract: A temperature control system for monitoring and controlling a zone supplied with low pressure steam is disclosed. The system comprises a series of balanced Wheatstone bridges which, when calibrated, provide a variety of manual and automatic control conditions to maintain the temperature in the zone. Means are provided for obtaining direct readings of room or zone temperature, and monitoring the position and movement of a steam control valve which is utilized as the heat metering apparatus. In order to compensate for environmental differences which may exist in various zones under control, there is disclosed apparatus for selectively varying the effect of sensors utilized in the system, and in particular, the effect of a resistance thermometer located within the zone which may be subject to variations in accuracy in terms of placement.

Abstract: Thermal energy transfer apparatus having a controllably variable thermal conductance comprises a heat pipe having a capillary wick structure therein, a circulating supply of working fluid which is controlled by a heater, and a thermostatic heater control which is responsive to the temperature of the hot end of the heat pipe. As working fluid condenses it is removed from the heat pipe. Liquid working fluid is recirculated into the heat pipe in discrete quantities by vapor bubble injection under the control of the heater and the heater control. If no fluid is injected into the heat pipe, the thermal conductance will decrease as condensate is removed. If fluid is injected into the heat pipe, thermal conductance will increase as fluid is supplied to the heat pipe.

Abstract: An improved steam boiler system includes an automatic means for injecting cool water into a steam bound boiler feed pump. In a first embodiment a pressure sensitive check valve detects the drop of pressure in the steam bound pump and in response thereto directs a cool water mist into the high side of the pump, thus reinitiating its operation. According to a second embodiment, cool water is sprayed into the pump in response to a drop of the water level in the boiler. In both embodiments, a vent line is used to bleed the high side of the centrifugal pump to a condensate tank in response to a drop of pressure in the pump. The vent line may be bled through a check valve or directly through a manual valve. Additionally, both embodiments employ a pressure sensitive valve in the boiler feed line, which shuts off the pump flow to the boiler whenever the pressure in the boiler exceeds the pressure at the output of the pump.

Abstract: Time controlled switching apparatus is connected in series circuit with a steam pressure sensor and a line starter associated with a boiler firing system. The switching apparatus is rendered electrically conductive during spaced time intervals of successive hours whereby boiler firing occurs during preselected time periods and then only where generated steam is at preselected pressure level.

Abstract: An improved steam boiler system includes an automatic means for injecting cool water into a steam bound boiler feed pump. In a first embodiment a pressure sensitive check valve detects the drop of pressure in the steam bound pump and in response thereto directs a cool water mist into the high side of the pump, thus reinitiating its operation. According to a second embodiment, cool water is sprayed into the pump in response to a drop of the water level in the boiler. In both embodiments, a vent line is used to bleed the high side of the centrifugal pump to a condensate tank in response to a drop of pressure in the pump. The vent line may be bled through a check valve or directly through a manual valve. Additionally, both embodiments employ a pressure sensitive valve in the boiler feed line, which shuts off the pump flow to the boiler whenever the pressure in the boiler exceeds the pressure at the output of the pump.