Thermodynamic Cycles



Steam Power Plants [all] are Carnot Thermodynamic Cycle machines. What if we don’t use temperature change for the vehicle of extracting energy? The Lurtz Cycle uses pressure that is created by gravity. The physical cycle is completed by converting liquid to gas with almost no temperature change [same as boiling water to steam]. We are not extracting energy from the “high temperature” gas; we are extracting energy from gravity driven pressure and “latent heat”. Latent heat is the heat required to convert a liquid to a gas with no temperature change. This is a NON-Carnot Thermodynamic Cycle.

Sealed Turbine/Expander


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The following are pictures of the Sealed Turbine/Expander. The Sealed Turbine/Expander is a non-eccentric device {i.e., no vibration; shafts are in-line}. It performs compression/expansion via sweeping gases into a volume that is either decreasing/increasing in size.

In this application, it is used as an expander. That means that the high pressure gas enters a small volume; and, as the components rotate, the volume become larger. The rotation is caused by the high pressure gas “pushing on the extension”. This creates torque that can be used to power an electrical generator.

This Turbine device was developed to have a “vibration-free” sealed compression/expansion mechanical component.  It can be used as a refrigeration compressor. A torque developing expander [as above]. As a Non-eccentric Internal Combustion Engine, see . Or as a “vibration-free” efficient air compressor.

NON-CARNOT Thermodynamic Cycle


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A diagram of the Lurtz Thermodynamic cycle follows.  This cycle was developed to utilize the enthalpy change that occurs when a liquid is converted to a gas.  For example, water at 212F with the addition of heat becomes steam at 212F with virtually no temperature change. But, there is an enormous enthalpy [energy] change [also a volume change].


Carnot efficiency laws were developed for the “Carnot Cycle”.  Simplistically, the Carnot Cycle is a thermodynamic cycle that is designed for “steam turbine power plants”.  With steam as the working fluid, the process can never let the gas {steam} become liquid or it will damage the high speed turbine blades.  Therefore, the Carnot Cycle operates between a hot gas and a cold gas.

The Lurtz Cycle [my invention, my name] is a NON-Carnot Cycle that is made possible via the use of a new type of turbine [pressure turbine] that is designed to convert gas to liquid without damage. The pressure turbine is a new device that does not have thin turbine like blades that can erode if exposed to liquid. Picutures to follow.

The Lurtz Cycle uses gravity to supply pumping energy to the power loop. Heat, waste heat, solar heat, etc., is provided to the “heat transfer point”.  The heat evaporates the liquid refrigerant working fluid with very little change in temperature.  The working fluid as a gas expands under pressure to drive the sealed turbine attached to the electrical generator.  After the heat is removed via the pressure turbine [converted to energy], the liquid refills the liquid column.

Many other mechanical configurations are possible, but the main idea is to use low temperature heat, i.e., heat less than 50C [122F]. For instance, ocean water at 39F could be used as a heat source and as long as there is a cold sink to convert the liquid back to gas one could power Antarctica.

Yes a working prototype has been constructed.  A complete thermodynamic analysis is available as a Excel spreadsheet. Information will be provided upon request.

No – this is not perpetual motion!  Heat is converted to electrical energy.  As the heat is used up, more must be provided or the cycle will stop.