DE3705053A1 - Single stirling engine - Google Patents

Abstract

Published without abstract.

Description

Although the first patent for a Stirling engine came back in 1816 was granted and after the standstill of the development around the From the turn of the century around 1950 a lot of money and development energy were invested in this reasonable principle, is the essential requirement of the Stirling principle, the isothermal compression and expansion has not so far been realized.

If you continue our entire knowledge of ecology, entropy and summarizes the chances of a humane life, so converting the age of wear into a like always structured solar age the old, unresolved Place task at the center of energy technology. In the long term, human-acceptable energy can only come from solar Annual heat storage systems are coming. So stand the future Engines only the relatively low heat gradient of 60-70 degrees Celsius between solar lead and medium Outside temperature available, in special cases a few hundred degrees.

The invention should be simple, quiet, environmentally neutral, durable and repairable by everyone solve old and yet completely current task: Zu

Fig. 1 In two vertical cylinders (vessels) ( 1 ) is a heat transfer medium ( 4 ) with a defined level.

The heat carrier (4), numerous liquids and melting of various substances which are on the heating side (6). In the upper part of the cylinder ( 1 ) work pistons ( 2 ), which have a classic Stirling engine ( 8 ) and ( 9 ) with a geometry offset by 90 degrees, or any other type of mechanical Stirling control.

There is between the piston and the level of the heat transfer medium any gas, preferably air or nitrogen. The gas can be charged or under atmospheric pressure work under higher pressure.  

The right heat transfer medium can be heated at ( 6 ), the left one is cooled at ( 5 ).

The Stirling geometry of the arrangement of ( 8 ) with flywheel ( 9 ) push the gas enclosed between the underside of the piston and the heat transfer medium in the known Stirling rhythm from the left to the right cylinder ( 1 ) over the regenerator ( 7 ).

The essential part of this simple Stirling engine are the heat exchange structures ( 3 ) attached under the pistons ( 2 ). The surface and structure of ( 3 ) are chosen so that almost isothermal compression is achieved in the left cylinder when the left piston descends.

There is great constructive freedom in the choice of ( 3 ) in the form of needles, nets, grids, wire, plates, tubes, wool, felt, grains or spheres.

In order to keep the loss of movement, immersion and immersion small, of course, predominantly very thin longitudinal structures. The same applies analogously to the right cylinder, which, if the structure and material of ( 3 ) are correctly selected, enables almost isothermal expansion.

The theoretical limit of a cycle between the temperature level of ( 6 ) and ( 5 ) is naturally the same as the Carnot process.

Although this machine is preferred to be used lower It also appears suitable for temperature gradients appropriate choice of material and suitable heat transfer medium for higher heating temperatures are used.

In principle, the machine is not just a thermal power machine with the simplest structure, but at any time as Heat pump and chiller can be used.

A particular advantage of this simple construction is also the possibility to look at the 4-cylinder arrangement to be able to establish an appropriate mass balance, furthermore the good suitability for assembly of building blocks and DIY systems of every performance class.

The preferred area of application is the "General Combined heat and power "in household and industry, the waste heat use and a second development aid in competition  for photovoltaics but without high-tech elements and without chemical Batteries.

With the right choice of pressures, materials, bearings and internal Losses can be constructed using machines simple care 50,000 or 100,000 hours and can also run more.

That means a Stirling engine of this type is a custom cash and urgently needed tool to deal with raw materials, Use energy and resources sparingly.

Because the inside of this machine explains everyone is the social acceptance for disarmament in the house, Given the kitchen and operations from the outset.

Claims (3)

1. Simple Stirling engine, characterized in that in two or more working cylinders ( 1 ) under the pistons ( 2 ) heat exchange structures ( 3 ) are attached, which can be immersed in and out of a heat transfer medium ( 4 ) and via regenerator ( 7 ), heating ( 6 ), Cooling ( 5 ), crankshaft or drive ( 8 ), and flywheel ( 9 ) with the gas volume enclosed between the piston ( 2 ) and heat transfer medium ( 4 ) enable an almost isothermal and low-loss Stirling or Carnot cycle. 2. Device according to claim 1, characterized in that the machine is driven and as a heat pump or chiller works. 3. Device according to claim 1, characterized in that Devices according to claim 1 with devices according to claim 2 are combined in a functional unit.