Electrical generator or motor structure – Dynamoelectric – Conducting fluid
Reexamination Certificate
1999-10-05
2001-05-15
Ramirez, Nestor (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Conducting fluid
C290S002000, C290S052000, C060S659000, C322S014000, C237S012100
Reexamination Certificate
active
06232679
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to combined heat and electricity generating plants for providing both heat for keeping a vehicle warm and electricity for powering such as domestic appliances.
BACKGROUND OF THE INVENTION
Steam turbines are well known. Steam turbines may have closed and sealed containment of the working fluid wherein the working fluid may be water or another fluid. It is also well known to use heat rejected by the steam turbine as a source of heat.
Large trucks perform a large and increasing fraction of the transportation of goods. Many of these trucks have cabins containing appliances requiring substantial amounts of electricity. These include air conditioners, ovens, lamps, electric blankets, etc. Virtually any small appliance sold for use in a home may be found in the cabin of a truck. It is common for the engines of these trucks to be operated constantly while the trucks are parked overnight to generate electricity for these appliances and, when the outside temperature is low, to keep the engine warm. Operating the engine overnight is both wasteful of fuel and a cause of engine wear. An electricity generator independent of the engine is desired to provide the required electricity and also provide heat for warming the engine and the cabin. However, no known electricity generator has achieved market acceptance.
A gas turbine powered electricity generator is known. It offers the desirable qualities of operation on diesel fuel, long life, quiet operation and low pollution and it provides waste heat for heating the engine and the cabin. It has the disadvantages of high cost and high fuel consumption.
Diesel powered generator sets are available at an acceptable price and size. However, they are noisy, generate odorous and unclean exhaust and they are complex devices that require maintenance and are not inexpensive to service.
Rankine cycles for power generation have been known for many years. For many years most electricity has been generated by steam turbines using steam from coal or oil fired boilers or from atomic reactors. It is also well known to use steam turbines for bottoming cycles for large diesel engines to convert waste heat to electricity. In small sizes such as one to five kilowatts steam turbines do not convert the energy in the steam efficiently to power. One reason for poor efficiency in small sizes is that very small turbine entry areas do not provide optimum flow conditions.
Heretofore it has not been recognized that a low pressure closed Rankine cycle turbine is superior to other known ways of providing heat and electricity to the cabin of a truck. Higher efficiency can be achieved by using a working fluid offering lower vapor pressure and lower speed of sound than water vapor. All of the desired features are obtained including operation on diesel fuel, low noise, acceptable exhaust constituents, simplicity, freedom from maintenance and acceptable efficiency.
SUMMARY OF THE INVENTION
The present invention provides a cogeneration plant comprising a Rankine cycle turbine prime mover in combination with an electric generator that is superior to other known systems for heating and providing electricity to truck cabins.
Further, in accordance with this invention, the turbine is provided in a closed cycle system operating at low pressure.
Further, in accordance with this invention, the closed cycle system utilizes a working fluid having a low speed of sound for enabling lower turbine speeds and larger nozzle areas.
A complete understanding of this invention may be obtained from the description that follows taken with the accompanying drawings.
REFERENCES:
patent: 3726085 (1973-04-01), Arenson
patent: 3913331 (1975-10-01), Conwell
patent: 4068475 (1978-01-01), Binstock
patent: 4262485 (1981-04-01), Kuroda et al.
patent: 4873840 (1989-10-01), Gilliusson
patent: 4875436 (1989-10-01), Smith et al.
patent: 5000003 (1991-03-01), Wicks
patent: 5172753 (1992-12-01), Kadle et al.
Dinh Le Dang
Ramirez Nestor
LandOfFree
Electricity generator and heat source for vehicles does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electricity generator and heat source for vehicles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electricity generator and heat source for vehicles will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2485767