摘要:
A hydrocarbon source feed is upgraded using a solvent deasphalting (SDA) unit employing a solvent having a critical temperature Tc by initially separating from a first hydrocarbon input stream fractions with an atmospheric equivalent boiling temperature less than about Tf° F. for producing a stream of Tf−fractions and a residue stream (Tf+ stream), where Tf is greater than about Tc−50° F. In the SDA unit, a second hydrocarbon input stream which includes the residue stream is deasphalted for producing a first product stream of substantially solvent-free asphaltenes, and a second product stream containing substantially solvent-free deasphalted oil (DAO). The source feed may be included in either the first or second input streams. The DAO in the second product stream is thermally cracked for producing an output stream that includes thermally cracked fractions and by-product asphaltenes produced by thermally cracking the DAO. Finally, at least some the said thermally cracked fractions are included in the first input stream.
摘要:
A method for using a two-phase fluid includes separating the fluid into its two phases, one of which is a hot gas containing energy in the form of latent heat, and one of which is a hot liquid containing energy in the form of sensible heat; converting sensible heat in the liquid to sensible heat in a working fluid for producing preheated working fluid; and transferring latent heat in the gas to the preheated working fluid for vaporizing the same at substantially constant temperature and pressure.
摘要:
A geothermal power plant operating on geothermal fluid includes a source of low pressure geothermal steam, and a turbo-generator including a low pressure steam turbine to which the geothermal steam is applied, and a generator coupled to the steam turbine. The low pressure geothermal steam is applied to the turbine, wherein expansion takes place driving the generator, and producing expanded steam that is exhausted from the turbine. A condenser for condensing the expanded steam includes a steam heat exchanger for receiving the expanded steam, a coolant, an air cooled heat exchanger, and a pump to exchange coolant during the steam heat exchanger and the air cooled heat exchanger, in a closed secondary coolant cycle. Preferably, the coolant is water.
摘要:
Turbulence is controlled in boundary layer or wall-bounded fluid flow fields having a turbulent wall region characterized by a system of roll pairs extending in the direction of flow, and obliquely propagating structures interacting with the system of roll pairs, by locally introducing into the turbulent wall region two separate disturbances that are effective to produce, in a local region, a composite disturbance field that is strongly coupled to and modifies the obliquely propagating structures in a manner that increases or decreases the interaction of the propagating structures with the system of roll pairs thereby locally increasing or decreasing the turbulence in the flow field. One of the disturbances may result from the interaction of the fluid with a linear strip, or an array of strips, of delta-shaped protrusions positioned spanwise on the wall (i.e., transverse to the flow direction); and the second disturbance may result from injecting sonic energy into the local region. Furthermore, a linear strip or an array of airfoil shaped protrusions can be used for producing a pair of counter rotating rolls for controlling turbulence in the boundary layer.
摘要:
A power plant operating on steam for producing electric power including a plurality of integrated power plant unit modules each having a steam turbine responsive to the steam and producing heat depleted steam, a steam condenser associated with the steam turbine operating at a pressure no less than atmospheric pressure for collecting non-condensable gases and condensing the heat depleted steam and vaporizing organic fluid applied to the condenser, a closed organic Rankine cycle turbine operating on the organic fluid and a single electric generator driven by the steam turbine and the organic Rankine cycle turbine for producing electric power, and also including means for supplying in parallel the steam to each steam turbine in each of the modules. A method for producing electric power using steam is also described.
摘要:
Weather in the vicinity of a land mass such as a continental arid zone near, and usually eastward of a body of water is modified by preferably propelling a ship pulling a submerged body having plurality of vertically displaced foils having an angle of attack that effects an upward displacement to the water in response to the surface displacement of the ship. The upward displacement of the water moves cooler sub-surface water toward the surface thereby cooling the surface water and reducing its heat loss in the summer. As a result, the heat capacity of the water is increased and additional heat will be stored in the water as a consequence of the greater absorption of solar radiation thereby increasing winter storms and the amount of rainfall over the land mass during the winter.
摘要:
The pressure of fluid supplied by a high-pressure line is reduced to a lower pressure suitable for a low-pressure utilization device located in an environment having an electrical grid by interposing a fluid motor between the high-pressure line and the low-pressure utilization device such that operation of the latter causes the high-pressure fluid to operate the motor and to exhaust into the utilization device. The fluid motor drives an asynchronous generator whose output is connected to the electrical grid through a switch whose state is normally open. The switch is maintained in a closed state only during operation of the motor by providing, for example, a pressure sensor in the exhaust of the motor for sensing the passage of fluid through the motor. As long as the utilization device is furnished with low-pressure fluid, the switch is closed and the output of the generator is fed directly into the power grid of the local environment, thereby reducing the amount of power being supplied to the local environment by the power company.
摘要:
A hybrid power system comprises a first energy converter operating on a closed Rankine cycle and including a vapor generator for vaporizing an organic working fluid in response to heat furnished from a heat source associated with a vapor generator, a turbo-generator responsive to vaporized working fluid for generating electrical power, and a condenser responsive to vapor exhausted from the turbo-generator for converting said vapor to a condensed liquid which is returned to the vapor generator. The system also includes a second energy converter including a thermo-electric generator having a junction, a heat source for heating said junction whereby said thermo-electric generator generates electrical power, and a heat pipe for conveying heat from said last mentioned heat source to the vapor generator of the first energy converter and to the junction.
摘要:
In a power plant which furnishes low-grade heat to a Rankin cycle turbo generator operating with an organic fluid, a fast-starting prime mover is selectively coupled to the generator, the generator capacity of the generator is oversized relative to the individual capacities of the turbine in the prime mover.
摘要:
The weather near a continental arid zone is modified by increasing the heat storage of the seas westwardly of the arid zone during the summer. The heat storage is increased by mixing the relatively warmer surface water with relatively cooler deeper water thereby reducing the surface temperature of the seas during the summer. Cooling the surface of the water will increase the radiant heat flux due to solar radiation and decrease the radiant heat loss from the surface during the summer thus increasing the amount of heat stored in the water an available for evaporation during the winter. Mixing is achieved by pumping water from a lower level in the seas to the upper level. In one embodiment of the invention, normal wave motion provides the mode of power for the pumping operation. In another embodiment, mixing is achieved by a paddle that is operated by wave motion.