Showing papers on "Heating system published in 1980"

Multi-phase modular comfort controlled heating system

Abstract: A circulating fluid that is heated by a number of gas-fired burner assemblies is used to heat a space either through a hot water system or a forced air heating system. Each burner assembly includes a housing with a heat exchanger mounted therein and a gas burner for heating the fluid which flows through the heat exchanger. The heat exchangers are connected in parallel in a closed loop forced circulation system. A microprocessor based thermostat control compares the temperature in the space heated by the air with a reference temperature. Dependent upon the magnitude of the difference between the temperatures, one or more of the burner assemblies are energized. The burner assemblies are sized such that during most of the heating season only a fraction of the burner assemblies are used. Burner assemblies are cycled on and off as needed to return the temperature to the steady state during the warmer and colder parts of the heating season at least one burner assembly is usually in operation during a majority of the heating season.

Furnace monitoring system

Abstract: A system for monitoring the operation of a heating apparatus having a combustion chamber with associated air and fuel supplies and an exhaust path includes sensors for monitoring temperatures at the combustion chamber A microprocessor and a display receives signals from these sensors and has a keypad to permit calculation and display of parameters indicative of proper operation of the heating system including fuel usage per unit time Limit values can be stored in the processor memory to trigger alarms when temperatures or fuel usage exceed the set limits Various measured and calculated values can be displayed

Controller for an air conditioning or heating system

Abstract: An apparatus is disclosed for activating a thermostat for an air conditioning or heating system. The apparatus comprises a control circuit and a controllable switch connected to activate and deactivate the thermostat controlling the air conditioning or heating system. A timing circuit provides a first timing period in which the thermostat is deactivated in addition to providing a second timing period to activate the thermostat. The control also includes a circuit for deactivating the thermostat for a period of time in the event the compressor terminates operation for any reason. An optional occupancy sensor increases the time of deactivation of the thermostat during periods of non-use of the area being air conditioned or heated. The foregoing abstract is merely a resume of one general application, is not a complete discussion of all principles of operation or applications, and is not to be construed as a limitation on the scope of the claimed subject matter.

Cooking appliance of the hot air circulating type

Abstract: The invention is related to improvements in a cooking appliance equipped with both a microwave heating means and a hot air circulation heating means. By controlling the rotational speed of an air circulating fan or the power of heater means according to the kind of food to be cooked, the cooking time is shortened and the quality of cooked food is improved. The hot air discharging section of such an oven includes a perforated plate so as to prevent leakage of microwaves from the heating chamber, and an air baffle means is provided strategically in the hot air discharging section to ensure a uniform distribution of temperature within the heating chamber. The invention also includes an improved relative position of the air inlets, a double-deck tray and the air baffle means which functions to prevent a substantive dehydration of food which is a drawback of a conventional hot air circulation heating system.

Hull heating system for an arctic offshore production structure

Abstract: A hull heating system for an offshore production structure for use in arctic waters wherein the heat from the produced fluids is used to maintain the temperature of the outer surface of the structure above the melting temperature of the ice adjacent the structure.

In-situ measurements of residential energy performance using electric co-heating

Abstract: An experimental technique is presented, called electric co-heating, for measuring the net efficiency of heating and cooling systems in residential buildings. In this technique, constant temperature is maintained inside the test building by thermostated, portable electric heaters. The net heat gain from any heating system in the building is measured by the reduction in electric heating needed to maintain constant indoor temperature. The method is illustrated with actual efficiency tests of a central gas fired heating system, an open fireplace, and a central air conditioner. Other capabilities of the electric co-heating technique illustrated here are the measurement of heat load caused by air infiltration and the measurement of an equivalent conductance of the building envelope. The in-situ characteristic of the method is stressed: actual, net heat gains, and cooling and heating loads are measured, reflecting the interaction between the tested appliance and the building containing it. In this context heating efficiency improvements of a heating system can be measured whether they stem from bettered combustion efficiency or from insulation of heating ducts.

Remote control car heater

Abstract: A remote transmitter is operative to start an electrical heater disposed in an automobile. The electrical heater operates off a separate electrical system from that normally found in the automobile. Once the automobile engine is started and the heating system of the automobile is operative, a thermostatic switch is actuated which removes power from the electrical heater.

Swimming pool heater temperature control system

Abstract: A swimming pool heater temperature control system is disclosed. The control system is designed to optimize the use of a conventional heater as a supplemental heat source for a solar heated swimming pool. The temperature control system operates by automatically adjusting the temperature settings of the heater to conform to the temperature vs. time profile of an optimum solar collector heating system. An embodiment is disclosed which employs two thermostats in conjunction with a time clock actuated switch to control the heater temperature profile as a function of time. Other embodiments are also described which employ a plurality of thermostats in conjunction with time clock actuated switches to provide a heater temperature profile which more closely matches that of an optimum solar collector heating system.

Process and apparatus for utilizing waste oil

Abstract: A heating system comprising the combination of storage vessels (10, 12) for conventional heating oil and waste oil, respectively, and in which the two storage vessels (10, 12) are effectively sealed apart, one from the other. At the initial stage of heating, conventional heating oil generates temperature of a predetermined amount and the waste oil from vessel (12) is thereafter utilized after having been heated either from a feedback of heat (26, 28) developed by the conventional heating oil from vessel (10) or by a separate electrical resistor element (133), such heating making the waste oil effective as a heating medium. The flows from the two storage vessels (10, 12) containing the waste oil and conventional oil, are pressure controlled (64, 84) so that relief pressure feedback (70, 82) is provided in each distribution network (14, 30). The two distribution networks (14, 30) are effectively communicated to a heater box in a boiler (22) and controlled by valving means (60) which permits flow from only one of the oil storage sources, and effectively precludes any commingling of oil from the sources either at the burner nozzle (142) or in the storage vessels (10, 12).

Enhanced oil recovery apparatus and method

Abstract: Apparatus for heating hydrocarbons, and the like, in an underground reservoir for the purpose of lowering the viscosity of the substance in the reservoir and facilitating the flow thereof has a flow channel arrangement disposable in a reservoir of the material to be treated for forming a flow path for a working fluid that is heated by a heating system associated with the flow channel arrangement. The heated working fluid is then discharged from the flow path and into the reservoir of material to be heated for the purpose of lowering the viscosity and improving the flowability of the material in the reservoir. The heating system includes an electrical resistance heating unit comprising an electrical circuit including at least one pair of opposed electrodes electrically connected in series and arranged along and partially forming the flow path for the working fluid, with the portion of the electrical circuit between the electrodes being completed through the working fluid. The series connection of the electrodes provide for efficient downhole use of electrical energy even at depths below 2,000 feet, by minimizing line losses to the electrodes and by creating, with accurate control, a very high resistance at the bottom of the well in which the device is disposed.

Solar energy system and method

Abstract: A solar energy fluid heating system and method wherein sunlight is focused on the one end of a number of light pipes and directed by the other ends of the light pipes onto a heat conductive surface at the bottom of a number of tubes within a fluid storage tank. Each of the tubes within the tank is apertured adjacent to the lower end thereof and open at the other end thereof to permit fluid circulation within the tank. The tubes may be entirely of heat conducting material to accomplish fluid heating over an increased portion of the tubes.

Air-conditioning/heating system

Abstract: A dual capacity air-conditioning/heating system including an evaporator, a blower, a compressor and compressor motor, the compressor motor having a two-speed mode of operation. The compressor motor speeds are changed by changing the shunt field current of the motor to achieve a significant reduction of energy consumption in the low-speed mode of operation. The blower motor has a two-speed mode of operation by changing the series armature resistance thereof.

Solar energy absorption and distribution system with full solar, solar assist, and fireplace heat exchanger modes

Abstract: A heating and cooling system, which in the "heating" mode provides fresh, filtered, solar heated air which may be augmented by a fireplace(s) heat exchanger to selectively complement or supplant a heating system otherwise fueled by mass-purchased fossil fuels (oil, gas, coal, etc.), without resorting to intermediate steps, i.e., heat pump assist, liquid conversions, low level air mixing, etc. A collector duct extends along the peak region of an attic space to direct air, heated by solar energy impinging on the roof, to the intake of a heating and/or distribution system within the building. Vents admit outside air to the attic space, adjacent the eaves, so the air is heated by the hot roof and rises to the inlet slot of the duct in the peak region. The duct transfer can be closed and a further inlet opened to admit normal return air from the occupied areas to the heating and distribution system. In the absence of adequate solar heated air, a heat exchanger installed in a conventional fireplace may be selectively energized to perform a similar function. In the "cooling" mode, the system provides outside, cool air to the distribution system within the building, either in lieu of air normally cooled by the air-conditioning compressor, or as supply air thereto for normal cooling function.

Method and apparatus for using solar energy to augment a refrigerant heating and cooling system

Abstract: An uninsulated tank-type solar collector for a reverse-refrigeration-cycle heating system is mounted in ambient air and contains a mass of water and/or ice having a refrigerant expansion coil immersed therein. At least one of the walls of the tank contacts ambient air on one surface, and the mass of water and/or ice on the other surface. Thus, the mass of water and/or ice exchanges or transfers heat from the ambient air by conduction to the expansion coil. During transition from water to ice, the freezing water liberates large amounts of energy as "heat of fusion" which is absorbed by the expansion coil.

Cooking appliance of hot air circulating type

Abstract: A cooking appliance is equipped with both a microwave heating device (34, 35, 36) and a hot air circulation heating device (15, 17). By controlling the rotational speed of an air circulating fan (17) or the power of the heater (15) according to the kind of food, the cooking time is shortened and the quality of cooked food is improved. The hot air blow-out section of such an oven is constituted by a perforated plate (18) so as to prevent leakage of microwaves from the heating chamber (2) and an air baffle (50) is provided strategically in the hot air blow-out section to ensure a uniform distribution of temperature within the heating chamber (2). An improved relative position of air inlets (22), a double-decked tray arrangement (33, 46) and said air baffle (50) serves to prevent dehydration of food which is a drawback of the conventional hot air circulation heating system.

Heat pump for household water heating - draws heat from water supply mains as indirect ground heat carrier

Abstract: The heat pump system is used for gaining heat for household heating from the ground. Heat is gained from ground indirectly over an area which is not excessively large via public water supply system. Heat pump supplies heat to the hot water of the central heating system and also to the water used in household. From the pipework system (8) of the central water supply is drawn a quantity of water and heat is removed from this quantity of water and the water is returned subsequently back to the mains. The return pipeline (5) reaches into the inner chamber of the pipeline (8) of the central water mains supply. The connection is made by a flexible hose pipe. The system consists of a heat pump (2) storage (3) extraction pipeline (4) and return pipeline (5). The system has heat exchanger coil (10).

Multimode heating system and method for heating

Abstract: An improved multimode heat-pump type heating system designed to heat a plurality of rooms efficiently under a variety of ambient temperature conditions. When in its first mode the heat pump system employs an operating fluid, such as ammonia, and an absorbing liquid, such as water. The ammonia is initially evaporated in a cold heat source so as to absorb or extract heat therefrom. It is then absorbed by the absorbing liquid and both transported to a boiler where the two are again separated. The absorbing liquid returns to the absorbing area while the operating fluid flows to a condenser and condensed after which it is returned directly to the evaporator. A plurality of heat exchangers are used to transfer heat from the operating fluid, the absorbing liquid or the system to a room heating fluid. In the second mode, the evaporator and absorbing portions of the system are bypassed and only the operating fluid circulates from the condenser to the boiler past heat exchangers in order to heat the operating fluid. The system switches to the second mode when ambient temperatures fall below a preselected temperature or when pressure in the evaporator drops below a predetermined level.

Induction heater arrangement for forging bar stock

Abstract: An induction heating system for heating an end length of a forging bar following the cut-off therefrom of a previously heated and forged end length is arranged to bring the end length to be heated to a uniform temperature despite the existence of a residual hot end portion from the previous heat. The heating system has an induction heating coil with a longitudinally extending axial passageway therethrough for receiving the bar length to be heated by insertion into a feed-in end of the coil passageway. A stop member is positioned adjacent the open other end of the passageway to abut the forward end of the inserted bar so as to locate it wholly within the passageway. Electrical circuitry is arranged to connect an AC power supply first to a partial portion of the length of the heating coil extending from the feed-in end thereof so as to heat the as yet unheated portion of the inserted bar end length to a temperature more or less corresponding to that of the residually heated endmost portion of the inserted bar length. Thereupon, the electrical circuitry then connects the full length of the heating coil to the power supply so as to evenly heat the inserted bar length throughout its entire extent to the desired forging temperature.

Supplemental heating system using solar radiation

Abstract: A heating system for supplementing a conventional furnace or the like is disclosed. The system includes a blower that receives air from the hot air supply system of the conventional furnace, and directs the air through a separate duct to the space to be heated. The present heating system may include solar collectors using air as the heat transfer fluid so that the heat transfer fluid can be directed into the space to be heated. The system also includes one or more low-wattage electric heating elements arranged so that one element is energized when the temperature is slightly below the desired temperature, and additional elements are energized as the temperature falls lower, to maintain the least possible electric energy usage.

Sports field heating and drainage system - has closed circuit sheathed pipes above and below ground, collectors and pump

Abstract: For open squares or paths accessible to the public the heating and drainage system, keeping the drains clear of ice and surface clear of snow and excessive water, is esp. for sports fields and recreation areas. Sheathed rib pipes below the surface, as heating system, combine with a ducting system of similar pipes above ground to form a closed circuit. Pipes are laid as drainage system with peripheral apertures in them, between two colectors. At least one collector has an end pump while the other has end valves for opening and closing to and from the atmosphere.

Heating system with a heat pump working by night-current

Abstract: Solar heating system, which can possibly also be designed as additional to room cooling, consisting of at least the following elements: a) an absorber for solar energy, b) two heat accumulators, c) an evaporator/heat exchanger, d) a compressor, e) a condenser/heat exchanger, f) a room heating device with a predetermined working temperature, g) possibly a supplementary heating system, h) a heat transfer medium pipe system with valves, via which the elements a) - e) can communicate thermally, the heat accumulators being designed as latent accumulators with meltable accumulator mass, and the melting temperature of the first accumulator lying below the working temperature and that of the second accumulator above the same.

Heating system for vehicle passenger compartment - has heating pipe arrays in grooved insulation plates covered with trim

Abstract: The vehicle heating system has special floor and wall panels inside which the heating fluid is ducted in arrays of pipes, which are covered with a thermally transmitting trim. The pipes are located in U-shaped ducts embedded in a heat retaining plastics foam, which forms the main body of the panels. The foam ensures that the heating effect drops off gradually when the vehicle is stopped, providing passenger comfort, e.g. at the ends of bus runs. The U-shaped ducts are in good thermal contact over half the surface of the pipes and are located by notches pressed into the outer side of the panels to hold the ducts away from the outer edges.

Heating and cooling system using frictional air heating

Abstract: A frictional heating system for communicating with an air supply duct to heat and cool air in a building, including an enclosure defining an interior, two air inlets, and at least one air outlet therein communicating with the interior of the enclosure for permitting air flow therethrough A plurality of turbines are carried on a common shaft for rotation therewith Each of the turbines is positioned within the enclosure for drawing air into the enclosure and frictionally heating the air therein A first conduit is in fluid communication with the air outlet, a water heater and an air conditioning system, for moving frictionally-heated air from the air outlet to one or the other of the water heater and the air conditioning system A motor assembly including a motor is operatively connected to the common shaft and positioned outside the enclosure for driving the common shaft and turbines

Boiler for hot water heating

Abstract: In a boiler for hot water heating systems, the combustion chamber is surrounded by a water jacket which is connected to a heating system return run and a heating system forward run. A jet (9) from a burner projects into the combustion chamber, which is surrounded in the manner of a sleeve or passed through by a water jacket with openings which is connected to an inward pipe (24) for water to be heated and an outward pipe (23) for hot water. This water jacket around the jet (9) can consist of a spiral pipe which tapers conically towards the burner. The inward pipe (24) is connected on the one hand to a fresh water feeder (38) and on the other hand to the water jacket (4) surrounding the combustion chamber and to the heating system return run (2) respectively. The outward pipe (23) is connected to the water jacket (4) of the combustion chamber and the heating system forward run (3) respectively or to a hot water utiliser (32).

Space saving underfloor heating circuit - has heat exchange pipes and electric wiring supported by wall brackets concealed behind skirting plates

Abstract: The under floor heating system, designed to occupy the minimum space, uses a large-area heating element (1) which may be unwound from a roll. This is supported by a concrete layer (8), and a carpet may be placed directly on top. By mounting the supply and return pipes (5,6) one above the other along the bottom of the walls (9), and supporting electric cables above them, there is little encroachment on the height above floor level. The heating element consists of two layers with a space between and its end is bent upwards and attached vertically to the wall. The pipes, cables and telephone wiring are all supported by brackets (4) attached to the wall and concealed behind a skirting strip (3).

Solar energy fluid heating system

Abstract: A closed solar water heating system automatically replaces, with air, the water which may be subjected to freezing when the system is in a nonoperative mode.

Blood heater for medical transfusion equipment - uses heating plate with meander path groove holding blood supply tube

Abstract: The device for heating blood being supplied to a medical transfusion device consists of a plate (10) made of a heat-conducting metal such as aluminium, copper etc. In the surface is a zig-zag channel with rounded beads interconnecting straight portions, into which the blood supply tube is inserted to form an extended heating path. Underneath the end of the plate are connected to a winding of a transformer connected to an alternating current source forming a heating system. A heat sensor can be attached to the underside to control the temperature. Alternatively, the current supply can be connected directly to the plate, or a conductive film can be mounted on the plate.

Alternative heating apparatus for use in a heating system having a fuel burner, particularly a forced-air central heating system

Abstract: The invention consists of an electrical heating apparatus which provides for controlled fuel substitution in a heating system, particularly a forced-air central heating system. The electrical heater assembly is mounted in the system and a device is provided to select electricity as the heating fuel when off-peak periods in electricity demand occur. Since the cost of producing electrical energy during these off-peak periods is well known to be lower than during peak period times, the user of the invention will realize savings in total heating fuel costs through the substitution of electrical energy for the primary fuel, such as oil, wherever the off-peak price of electricity is sufficiently lower than the energy-equivalent price of the primary fuel. Where fossil fuels, principally oil, are used as the primary heating fuel, the invention will further act to conserve increasingly scarce and increasingly costly fuel supplies. Since the electrical heater is not used during peak demand periods, no increase in generating capacity is required for the invention to be utilized on a mass scale.

Central-heating system circulation pump controlled in dependence upon temperature

Abstract: 1. Circulating pump for heating plants, controlled as a function of temperature, which is to be operated at two speeds of revolution at least, a temperature sensor (6) altering the speed of revolution when a preselected switching temperature is being passed through and the speed of revolution which is to be selected being determined by the direction of the temperature gradient and the temperature sensor being affected by two temperatures, of which one is the feed temperature of the heating plant, characterised in that the other temperature affecting the temperature sensor is the temperature of the winding of the pump motor, that the switching temperature at the instance of an r.p.m. variation which is to be performed lies between the feed temperature and the winding temperature and that the temperature in the motor head is measured along the direct path of the heat flux from the motor winding (1) to the heating water.

Auxiliary heating system

Abstract: An auxiliary boiler is provided for substantially reducing fuel consumption of a conventional forced-air heating system. A boiler tank substantially filled with water is connected by hot and cold water lines to a heat exchanger disposed within the cold air duct of the forced-air heating system. A firebox which extends into the boiler tank is adapted to receive combustible material such as wood for heating the water in the tank. A pump directs hot water from the tank through the hot water line to the heat exchanger whereby cool air moving through the cold air duct is preheated as it passes through the heat exchanger. Heating tubes in communication with water in the boiler tank may extend through the firebox for supporting logs therein. Additional heating tubes may extend through a flue directed upwardly from the firebox through the boiler tank.