In a polymerization system having first and second feed streams, diluent and recycled diluent streams, and a modifier stream controllably fed to a reactor, a resultant product stream is passed from the reactor, and a gas stream is removed from the resultant bottoms product of the reactor. The gas stream is analyzed and signals are delivered in response to the analysis. The signals are modified and compared to a modified signal responsive to one of the flow rates of the recycled diluent stream of...

A hot-gas engine to which thermal energy is supplied by means of a heating system, which conducts a flow of heated medium along the heater and in which the heater is formed by a first wreath of pipes which communicate at their one end with the expansion space and at their other and communicate with further pipes which communicate with the regenerator and in which the further pipes are situated at least partly within a container in which a substance or a mixture of substances is present in which ...

An operating cylinder and a regenerator cylinder are located adjacent each other, each cylinder having a manifold extending therefrom; a group of staggered U-shaped heating tubes connect the manifolds, the manifolds being arranged in planes which partly overlap, the legs of the U-shaped tubes being connected to wall portions of the parallel manifolds which are adjacently located, and so placed that the bends of the U-shaped tubes are positioned in planes which are parallel to the planes which in...

A hot gas Stirling type engine has a heater head comprising a plurality of arcuate shaped heat transfer pipes connected between regenerator and cylinder manifolds.

The Stirling cycle engine module is a conventional single cylinder, twin-piston displacer-type engine, with the addition of a rotary valve/crankdisc which times and isolates the thermal phases of the cycle, so that effective thermal separation is maintained for maximum operating effectiveness. Multiple hot and cold conduction threaded rods are uniformly placed within the respective displacer zones for more effective heat transfer. A modular system is adopted of ganging individual engine modules ...

There is provided a gas cycle which is of particular usefulness in the utilization of heat which is not of relatively high temperature. An engine operating with the subject gas cycle may use thermal energy derived from Radioisotope decay.

A thermodynamic cycle heat engine comprising a regenerator housing with two bi-directional regenerators, compression and expansion chambers connected to different ends of the housing, and a gear train. Each of the bi-directional regenerators comprises a low pressure connection having a first volume and a high pressure connection having a second volume less than the first volume. The bi-directional regenerators, the compression chamber, and the expansion chamber form a closed space for a working ...

Impingement style heat exchanger through which significant heat transfer improvements can be obtained. The heat exchanger of the present invention operates such that the bulk of heat transfer between the heat source and the working fluid occurs during the portion of the Stirling cycle in which the working fluid impinges upon the pressure vessel surface. Either or both of two heat exchanger configurations may be used. In a first, the impingement heat transfer occurs while the fluid is traveling i...

A hot and cold engine operating based on a regenerative gas cyclical process, with at least two pistons (2, 3), which separate at least three processing chambers (4, 6, 7) with an in-line arrangement of respectively at least one heat exchanger (13, 15) and at least one regenerator (11, 12) arranged in series with the heat exchanger. In order to eliminate the danger of freezing for the cold heat exchanger (15) and thus the air heat exchanger (16), at least one of the regenerators (12) assigned to...

An evaporative burner that includes an igniter assembly, a swirler, an evaporation chamber, and a reverse throat. The reverse throat has raised ends that protrude into the evaporation chamber. The reverse throat in combination with the evaporation chamber and the swirler, facilitate the recirculation of air in the evaporation chamber such that a flame is stabilized near the evaporation chamber walls. This flame gradually evaporates the fuel in the lining of the evaporation chamber. The fuel-air ...