摘要:
A heat exchanger according to the present invention comprises a housing for containing an upper and a lower layer of fluid, means for preventing intermixing of the two fluids, and heat transfer means for enhancing the transfer of heat between the layers. Specifically, the heat exchanger means is in form of a plurality of elongated cylinders extending into both layers, each of said cylinders containing a convective fluid. Preferably, the convective fluid is a liquid; and the preferred liquid includes water. Where the fluid in each of said upper and lower layers is a gas, the preferred orientation of the cylinders is vertical. The hotter fluid should be beneath the cooler fluid so that heat from the hotter fluid is first transferred to the liquid in the lower ends of each cylinder. The buoyancy of the heated liquid sets up convection currents which carry the heated liquid upwardly in the vertical cylinders where the heat is given up to the cooler fluid. Although a larger heat transfer surface is involved, the material cost of the heat exchanger is relatively low, and a relatively compact heat exchanger results. To further enhance heat transfer, the hotter and cooler fluids should be in counterflow arrangement.
摘要:
The air in a greenhouse is dehumidified using a direct-contact heat exchanger utilizing concentrated brine. The diluted brine produced when water vapor in the greenhouse condenses on the concentrated brine is regenerated in a fuel-fired boiler whose products of combustion, carbon dioxide and water vapor, are passed into the greenhouse. The products of combustion provide the desired level of carbon dioxide in the greenhouse; and the excess water vapor in the products of combustion as well as a significant portion of the water vapor produced by plants, growing in the greenhouse are removed by the hygroscopic concentrated brine.
摘要:
Apparatus for conditioning air in an enclosure includes a direct contact air/brine heat exchanger constructed to exchange air in the enclosure with the direct contact heat exchanger, and a reservoir of brine. A first brine loop is established by which brine from the reservoir is exchanged with the direct contact heat exchanger for condensing water vapor in the enclosure air onto the brine to form dilute brine that flow into the reservoir. The apparatus also includes a brine boiler constructed and arranged for establishing a second brine loop in which dilute brine from the first loop is exchanged with the boiler for evaporating water from the dilute brine and producing steam. Finally, a flow control is provided for maintaining a smaller flow rate in the second loop than in the first loop.
摘要:
A power plant includes a source of water, a heat exchanger having an evaporator side maintained below atmospheric pressure for converting the water to steam, and a turbine responsive to said steam for producing work and heat depleted steam. The heat exchanger also has a condenser side for receiving and condensing the heat depleted steam. The evaporator side of the heat exchanger is separated by a barrier from the condenser side. Concentrated brine from a source thereof is caused to fall in a film on the condenser side of the barrier, and water from the water source is caused to fall in a film on the evaporator side of the barrier. The heat of dilution of the film of concentrated brine, as it is directly contacted by the heat depleted steam in the condenser side of the heat exchanger, is transferred through the barrier from the condenser side to the evaporator side raising the temperature of the film of water on the evaporator side which evaporates in the reduced pressure in the evaporator. The cooled and diluted brine withdrawn from the condenser is reconcentrated in a constant enthalpy brine evaporator.
摘要:
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.
摘要:
The wind-mixed layer of a salt-water solar pond is dynamically stabilized against wind by creating a two-layer flow regime in the wind-mixed layer. Lighter less dense water flows in one direction adjacent the surface of the pond and heavier, more dense water flows in the opposite direction beneath the lighter water. The two-layer flow regime can be created by selectively connecting the wind-mixed layer to a source of brine whose density exceeds the average density of water in the wind-mixed layer. Alternatively, the two-layer flow regime is created by selectively adding fresher water to the surface of the solar pond at the surface thereof to replace evaporation losses.
摘要:
Power is generated from a body of hot brine by injecting a liquid operating fluid, such as butane or Freon, into the brine at a depth where the hydrostatic pressure of the brine is approximately equal to the vapor pressure of the operating fluid at a temperature of the brine for producing a bubble regime in a vertically oriented lift tube whose lower end is immersed in the brine whereby working fluid is raised in the lift tube as the bubbles rise therein. The gaseous operating fluid is separated from the liquid working fluid which is returned to the body of brine, and the gaseous operating fluid is condensed in a condenser and returned in a liquid state for injection into the hot brine at the inlet of the lift tube. The working fluid that is raised in the lift tube is passed through an hydraulic turbine.
摘要:
A rotating liquid ring rotating casing gas turbine (10) has at least one liquid ring rotating casing (13) having an eccentrically mounted impeller (11) adapted to rotate within a surrounding liquid ring (14) so as to form chambers (15) of successively increasing volume between adjacent vanes of the impeller. A working fluid formed by high pressure gas is injected into the impeller where the chambers are narrow via a fluid inlet (19) within a static axial bore (23) of the impeller so as to rotate the impeller and in so doing the gas expands isentropically. A fluid outlet (20) within the static axial bore of the impeller and fluidly separated from the fluid inlet allows the working fluid to escape at low pressure and low temperature.
摘要:
A heat engine, includes at least one Liquid Ring Rotating Casing Compressor (LRRCC) having a fluid inlet and a fluid outlet, a combustion chamber in fluid communication with the output of the LRRCC, and at least one expander having a fluid inlet and a fluid outlet. The fluid inlet communicates with the combustion chamber.
摘要:
A liquid desiccant regenerator system, including a desiccant/air heat exchanger having a first desiccant inlet and a desiccant reservoir. The reservoir has a first desiccant outlet, a second desiccant outlet and a second desiccant inlet. The first desiccant inlet and the first desiccant outlet are connectable to a heat source, the second desiccant inlet conducts diluted desiccant of the reservoir and the second desiccant outlet conducts concentrated desiccant from the reservoir. The second desiccant inlet and the desiccant outlet are connected to a desiccant/desiccant heat exchanger for applying heat to the diluted desiccant flowing into the reservoir. A dehumidification method is also provided.