DE202015008812U1 - Combined heat with rotary piston steam engine - Google Patents

Abstract

A combined heat and power plant for supplying electricity and heat to moving and stationary objects, comprising: a controllable burner control, a liquid evaporation system, (especially water), a rotary steam engine having inlet slots for steam and one or more pistons disposed on a shaft, wherein the generated torque is passed directly to a generator; a vacuum area for receiving and condensing the residual steam, a combined feedwater, cooling circuit and a controllable electrical load.

Description

Power cogeneration machine with rotary piston steam engine for heat and power production with modulable power and heat output for moving and stationary objects.

Steam engines of conventional design have piston engine, executed with power transmission via crank and connecting rod to the drive shafts, or are designed as a rotary piston engines with gear. Others are designed as linear motors with directly coupled generator (eg DE 102 09 858 B4 ). All known designs with crank and connecting rods and / or gears require lubrication of the bearings, which are difficult to realize in the high temperatures of the media necessarily occurring in steam engines up to 500 ° C and the required high service life (> = 80,000 Bh). The separation of the steam, or the condensate from the lubricant during continuous operation can not be fully achieved. In addition, the known machines can not be varied at all, or only in a small range in the electrical and thermal power output. However, modulation capability is an important requirement for combined heat and power plants to provide grid services in the increasingly volatile power supply. Although linear generators can modulate sufficiently, they are very complex in design and require high regular maintenance costs. Also known are air pressure motors, which are constructed very wear-free, by not having realized the necessary seals in the pressure range by seals, but by precisely guided minimum gaps without touching the materials involved. A part of the sealing surfaces are rotatably guided over a very low-loaded gear transmission. For the use of such air motors as a rotary piston steam engine of the steam inlet is realized via self-regulating control slots in the inlet area. The protection specified in claim 1 invention is based on the problem of providing a machine which is modulated both in the thermal and in the electrical power output, has no friction surfaces in the pressure range and thus allows a structure without lubricant. Maintenance and service costs are kept very low.

This object is achieved with the features listed in the protection claim 1.

With the invention it is achieved that in a compact machine ( 1 ) the controllable evaporator ( 1 ), the generator ( 2 ) the rotary piston steam engine ( 3 ), the capacitor ( 4 ), and the heat exchangers ( 8th ) and or ( 9 ) the modulated heat and current extraction can be realized. In the vapor pressure range, no lubricants are used. A gear is not required. By means of vacuum pump ( 5 ) is in the outlet of the vapor pressure motor ( 3 ) Generates negative pressure. The resulting higher pressure difference between the steam inlet and outlet on the rotary piston steam engine increases the efficiency of the machine.

An advantageous embodiment of the invention is specified in the protection claim 2. The development makes it possible to operate the rotary piston steam engine as a pure heat source without power extraction. For this purpose, the condensate from the tube condenser ( 8th ) via the solenoid valve ( 7 ) led to the expansion tank for cooling / feed water.

A further advantageous embodiment is specified in the protection claim 3. ( 2 ) This training makes it possible to access the solenoid valve ( 7 ) to dispense with the generator ( 2 ) is designed as a motor / generator. By deliberately approaching a certain piston position, the inlet slots are kept closed on the vapor pressure motor and the condensate from the tube condenser ( 8th ) is controlled by the overflow valve ( 10 ).

An embodiment of the invention will be described with reference to 1 to 3 explained. Show it:

1 the power cogeneration machine with evaporator ( 1 ), Generator ( 2 ), Rotary piston steam engine ( 3 ), Capacitor ( 4 ), Cooling and feedwater tanks ( 5 ), Vacuum pump ( 6 ), Magnetic valve ( 7 ), Tube condenser ( 8th ) and heat exchangers ( 9 ).

2 as 1 with replacement of the solenoid valve by the overflow valve ( 7a ) and replacement of the generator by the motor generator ( 2a ).

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10209858 B4 [0001]

Claims (3)

Combined heat and power plant for the supply of electricity and heat to moving and stationary objects, comprising: a controllable burner control system, a liquid evaporation system, (especially water), a rotary piston steam motor having inlet slots for steam and one or more pistons disposed on a shaft, the generated torque being directed to a generator; a vacuum area for receiving and condensing the residual steam, a combined feedwater, cooling circuit and a controllable electrical load. Machine for cogeneration, according to protection claim 1, characterized in that a bypass to the rotary piston steam engine with pipe condenser and a solenoid valve for reducing pressure on the rotary piston engine are provided. A power cogeneration machine according to protection claim 1, characterized in that the generator ( 2 ) as a combination of motor generator ( 2a ) is formed and the solenoid valve ( 7 ) by an overflow valve ( 7a ) is replaced.

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