Power plants – System having plural motors or having diverse types of...
Patent
1996-08-19
1998-04-21
Kwon, John T.
Power plants
System having plural motors or having diverse types of...
60708, F01B 2104
Patent
active
057406774
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a method for operating a plant, preferably a wind/diesel plant, comprising at least an internal-combustion engine, a wind turbine, a distillation unit, and a first closed fluid circuit containing heating and cooling devices, and a second open fluid circuit.
The invention further relates to a plant for use by the method.
In residential areas in which the access to necessities such as electricity and fresh water is difficult or nonexisting, it is possible to erect a so-called stand-alone plant of the wind/diesel type.
GB 2,246,602 discloses a stand-alone plant for the production of electricity and comprising one or several wind turbines, a dumpload for dumping the electrical energy not consumed, and a diesel engine. The plant is further provided with a flywheel for energy storage. The wind turbines drive an induction generator whereas the diesel engine drives a synchronous generator. The flywheel is driven by, respectively drives an induction engine, respectively generator. All generators are connected to a consumer grid and the connection may be disconnected if power must be supplied to the consumer grid by the electricity producing unit in question. Plants corresponding to the one described above are also known from the research centre of Ris.o slashed. Forskningscenter.
The disadvantage of that plant, among other things, is the necessity of having to disconnect one or both generators when the electricity consumption is low. In this manner valuable electricity production may be lost. Furthermore, the plant is built up of several individual units the only common purpose of which is the production of electricity, so that the plant is very dependant on the consumption of electricity.
Furthermore, deteriorated operation of the diesel engine will be pronounced in cases when it runs at a low load.
GB 2,125,486 discloses a plant largely corresponding to the plant disclosed in GB 2,246,602. The plant is provided with special hydraulic energy storage means and it is stated that other energy resources than wind energy and the energy of a diesel engine may be used, such as solar energy, tidal energy, wood burning or steam engines. Otherwise, however, the plant possesses the same disadvantages as the plant disclosed in GB 2,246,602.
U.S. Pat. No. 4,122,679 discloses a method and a device for increasing the output of a diesel engine at low loads by preheating the intake air of the engine before it is led into the engine. This is accomplished by a separate fluid circuit being heated by the exhaust gases of the engine and thereafter being led to a heat exchanger in the intake air duct of the engine for heating the intake air.
That document merely describes a way of heating the intake air of a diesel engine, and it is not shown in conjunction with a stand-alone plant or in any other conjunction with the production of electricity. Furthermore, it is disadvantageous to preheat the intake air of the engine when running at low load by using the exhaust gases since there is not much heating capacity in the gases when the engine operates at low load.
It is the object of the present invention to disclose a method and a plant of the type discussed above and allowing continuous utilization of the electrical energy produced, and wherein there is at the same time optimal utilization of the power machines used for the production of electricity.
This object is achieved by a method characterized in that the fluid of the first closed circuit is led through an electric heating unit being supplied with energy from the wind turbine and the internal-combustion engine and through the cooling system of an internal-combustion engine and a distillation unit in which a thermal energy transfer is established with the liquid of the second open circuit, and that fluid from the first closed circuit is fed into the cooling system of the internal-combustion engine and regulated depending on the temperature of the fluid in an outlet of the cooling system of the internal-combustion engine, an
REFERENCES:
patent: 4122679 (1978-10-01), Charon
patent: 4189925 (1980-02-01), Long
patent: 5528901 (1996-06-01), Willis
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