Abstract: A system for conditioning the air in an enclosure, such as a greenhouse, uses low grade heat contained in a liquid, e.g., condenser cooling water that is normally discharged downstream of a power plant. The system includes an indirect contact heat exchanger with a heat exchange surface having one side contacted by the fluid, and a direct contact air-brine heat exchanger associated with the enclosure including a blower for exchanging air between the enclosure and the air-brine heat exchanger. The system also includes a pump for exchanging brine between the direct contact heat exchanger and the other side of the heat exchange surface of said indirect contact heat exchanger. Thus, an efficient indirect, liquid-to-liquid heat exchange operation takes place between the brine and the low grade heated liquid; and an efficient direct, air-brine heat exchange operation takes place to heat the air in the enclosure without increasing its humidity.

Abstract: A method of cleaning watery i.e. humid, ventilating air containing liquids which have been gasified during cooling or lubrication of converting machines, particularly rolling mills, comprises cooling of the ventilating air in one or several stages to a temperature below the condensing point of the gasified substances in the ventilating air, so that these substances condense. In connection with the condensation, the larger portion of the condensed cooling or lubricating liquids is separated from the water and reused. The condensed water mixed with the rest of the condensed cooling and lubricating liquids is returned to the cleaned and dried ventilating air and is caused to be absorbed by the ventilating air. By dividing the cooling operation into two steps, the cooling and lubricating liquids can be caused to condense in the first stage without condensation of any water and water can be caused to condense substantially only in the second stage.

Abstract: An exhaust gas containing sulfur trioxide is passed through a first heat exchanger which cools the gas to a temperature which is above the sulfur trioxide dewpoint, so that condensation of sulfur trioxide does not occur in the first heat exchanger, but below a material limit operating temperature of a second heat exchanger, which further cools the gas below the sulfur trioxide dewpoint, whereby the first heat exchanger is protected against corrosion and the second heat exchanger is protected against thermal damage.

Abstract: A pollution control system includes a condenser and filtering unit for removing vaporized organic solvents and particulate matter. The condenser includes baffles that define vertical flow paths, and hot exhaust gases are directed from above to alternate flow paths to flow downward while atmospheric air is directed upwardly through the remaining flow paths to cool the exhaust gases and the heated air is used to maintain the atmospheric air above a selected temperature. The filter unit includes a horizontal movable filter which is automatically replaced with a new filter section when the pressure differential across the filter exceeds a certain level.

Abstract: A heat extractor system for a furnace, said furnace including a burner with a chimney that is connected but is normally not in operation. Instead, the furnace is connected to a vent in parallel with the chimney through a draft-inducing arrangement including a water spray in which water is heated and circulated to a point where the heat from the water is utilized. Due to the parallel arrangement of the vent and chimney, if the vent fails to operate, it will function in a fail-safe manner, with the combusted gases from the burner leaving through the chimney.

Abstract: A bay window includes a frame assembly composed of an inner head, an inner transom, an inner sill, an outer head, an outer transom, an outer sill, a middle horizontal panel interconnecting the inner and outer transoms, and a lower horizontal panel interconnecting the inner and outer sills. A window unit is disposed between the outer head and the outer transom, and a housing or bay window cupboard is disposed between the middle and lower horizontal panels. A ventilator is accommodated in the housing and has an air inlet port communicating with air inlets defined in the inner sill and opening into a house interior space, and an air outlet port communicating with air outlets defined in the inner transom and opening into the house interior space.

Abstract: A system for recovery systems improving heat recovery from hot waste water is provided whereby cold feed water is preheated by means of extracting heat from hot waste water by passing said hot waste water and said cold feed water through a heat exchanger. Said preheated feed water is directed simultaneously to the hot water heater and to mixing valves at the point of usage of tepid water. Equal volumes of waste water and cold feed water flow through the system.

Abstract: A ventilation system comprising a heat-exchanger rotor mounted in a four-chamber housing supported on a panel or window unit, and a preliminary heat-exchange unit mounted at an air-intake portion of the housing. The window unit has a frame composed of a plurality of hollow structural sections defining a heat-medium passageway for circulation of heat medium such as hot water or cold water therethrough. The preliminary heat-exchanger unit has a radiation/endothermy tube connected to the heat-medium passageway for fluid communication therewith. The radiation/endothermy tube serves to prewarm or precool air (introduced from the exterior) before the latter passes through the heat-exchanger rotor.

Abstract: A process and an installation for the heat treatment of a product liquid based on the continuous flow principle, in which a regenerative heat-exchanger is used in conjunction with a high temperature heater for product liquid. A part of the heat-exchanger is provided with an additional heat-exchanging surface which is connected to a cooling circuit, the variable capacity of which is determined and controlled by both the temperature and the output of the product liquid, whereby to maintain the efficiency of the heat treatment under changing input quantities of the product liquid. Control, above is effected by a combination temperature sensor interconnected to the product liquid conduit directed to the high temperature heater and a flow rate sensor interconnected to another given portion of the product liquid conduit.

Abstract: Waste water of above ambient temperature in a commercial laundry is directed through a self-cleaning plate and frame heat exchanger to heat incoming fresh water. Some of the fresh water heated to a first temperature is directed to a cold water storage tank to raise the water therein above ambient temperature which results in substantially lessened downstream requirements for heat input with commensurate cost reductions. The remainder of the fresh water is heated to a higher second temperature and is directed to a hot water storage tank. A system of valves regulates the temperature of the water flowing into each of the hot and cold water storage tanks to maintain a preset temperature in each of the storage tanks.

Abstract: A ventilation heat recovery system is mounted in a livestock building or the like. The system includes a counterflow shell and tube heat exchanger with an outer sleeve axially surrounding the shell along a substantial longitudinal portion thereof. Air is drawn from the ambient atmosphere into the shell for heat-exchanging flow counter to exhaust air that is drawn from the building atmosphere and forced through the exchanger tubes for exhausting to the ambient atmosphere. An annular-shaped distribution channel is formed between the outer sleeve and the shell, and the sleeve has a plurality of distribution orifices therealong for distributing incoming air to the building atmosphere. The channel is in flow communication with the shell through a transition zone defined between the end of the shell and a transition manifold which supports the tubes. Alternatively, the shell is in flow communication with a remote distribution duct having a plurality of distribution orifices.

Abstract: A ceiling radiation heater has a plurality of hot-air radiation pipes arranged as high as possible below the ceiling at a distance from the ceiling and from each other in one or several planes longitudinally parallel side by side and combined in groups, with reflectors behind which thermally insulating layers may be provided arranged above and laterally of the pipes. Combustion gases and/or waste heat available from production processes may be introduced into the air-filled, closed hot-air radiation pipe system.

Abstract: Exhaust gas treatment method and apparatus extract heat from an exhaust gas by operating in a water-condensing mode which allows more heat to be recovered, removes particulate matter and condensed acid from the exhaust gas, and washes heat exchange surfaces to keep them clean and wet to improve heat transfer. Systems for heating water, air and both water and air are disclosed. Methods of constructing and assembling improved heat exchangers are disclosed.

Abstract: A room ventilator structured to define therethrough both a primary airstream and a secondary airstream arranged in heat exchange relationship with each other. A heat exchanger located to have both said primary and secondary airstreams flow therethrough is structured to divide both of said streams into numerous smaller partial airstreams with walls made of high thermal conductivity intermediate the partial airstreams to enhance the heat exchange capacity between the streams. The heat exchanger is designed so that it may be installed in the ventilator in a plurality of reversed positions without impairing its function.