초록 ▼

A closed cycle thermodynamic apparatus (10) is provided for powering a combustion machine. The apparatus (10) has a compressor (12) for compressing a working medium from a reservoir (14) at temperature T1. The temperature of the working medium increases during compression and reaches temperature T2

A closed cycle thermodynamic apparatus (10) is provided for powering a combustion machine. The apparatus (10) has a compressor (12) for compressing a working medium from a reservoir (14) at temperature T1. The temperature of the working medium increases during compression and reaches temperature T2 when leaving the compressor (12). It is then expanded in an expander (16) for turning the machine. In this manner mechanical work is extracted from the working medium. The apparatus (10) has a first heat exchanger (18) and a second heat exchanger (20) connected to the compressor (12) and the expander (16) in a closed cycle. It also has a burner (22) and a third heat exchanger (24). Air, as a Heat transfer medium, at ambient temperature T5 is induced into the second exchanger (20) to cool the working medium by receiving heat therefrom. The temperature of the working medium decreases from T4 to T1 before entering the compressor (12) for repeating the cycle. The air which is now at a higher temperature T6 is conveyed to the burner (22) where it is mixed with fuel to form a combustion gas reaching an even higher temperature at T7 and passed into the first exchanger (18) for heating the working medium at constant pressure. In this manner the temperature of working medium increases to T3 when entering the expander (16) and following expansion for conversion to mechanical power its temperature reduces to T4. The apparatus (10) thereby recovers heat at all the heat exchangers (18),(20) and (24). This reduces the amount of fuel required to heat the air for combustion.

대표청구항 ▼

A closed cycle thermodynamic apparatus (10) is provided for powering a combustion machine. The apparatus (10) has a compressor (12) for compressing a working medium from a reservoir (14) at temperature T1. The temperature of the working medium increases during compression and reaches temperature T2

A closed cycle thermodynamic apparatus (10) is provided for powering a combustion machine. The apparatus (10) has a compressor (12) for compressing a working medium from a reservoir (14) at temperature T1. The temperature of the working medium increases during compression and reaches temperature T2 when leaving the compressor (12). It is then expanded in an expander (16) for turning the machine. In this manner mechanical work is extracted from the working medium. The apparatus (10) has a first heat exchanger (18) and a second heat exchanger (20) connected to the compressor (12) and the expander (16) in a closed cycle. It also has a burner (22) and a third heat exchanger (24). Air, as a Heat transfer medium, at ambient temperature T5 is induced into the second exchanger (20) to cool the working medium by receiving heat therefrom. The temperature of the working medium decreases from T4 to T1 before entering the compressor (12) for repeating the cycle. The air which is now at a higher temperature T6 is conveyed to the burner (22) where it is mixed with fuel to form a combustion gas reaching an even higher temperature at T7 and passed into the first exchanger (18) for heating the working medium at constant pressure. In this manner the temperature of working medium increases to T3 when entering the expander (16) and following expansion for conversion to mechanical power its temperature reduces to T4. The apparatus (10) thereby recovers heat at all the heat exchangers (18),(20) and (24). This reduces the amount of fuel required to heat the air for combustion. ; a controller operably connected to the drive; and a sensor for sensing the presence or absence of strapping material at the strapping head, the sensor being operably connected to the strapping head and configured to generate a signal to the controller to initiate refeed of the strapping material, wherein the one and only one pair of reversible feed elements is configured to automatically feed, retract and refeed the strapping material upon an appropriate signal from the controller. 6. The strapping machine in accordance with claim 5 including a guide configured to receive the strapping material from the feed assembly and to provide a path to the strapping head, the guide further configured to space the feed assembly from the strapping head. 7. The strapping machine in accordance with claim 6 wherein the feed assembly and strapping head are independently mounted to the frame and spaced from one another and wherein the guide is disposed between the feed assembly and the strapping head. 8. The strapping machine in accordance with claim 5 wherein the one and only one pair of feed elements is a pair of feed wheels. 9. The strapping machine in accordance with claim 8 wherein the feed wheels include a driven wheel and an idler wheel. interconnecting a wall base to said upper portion; and, wherein said extending longitudinal part of each of said wall bases further comprises: a keyway for accepting said spline therewithin. 6. A portable garage as described in claim 5 wherein each of said base connectors has two splines mounted 180° apart to accept two wall bases of the same wall. 7. A portable garage as described in claim 5 wherein each of said base connectors has two splines mounted 90° apart, each for accepting one of said wall bases of adjacent walls. 8. A portable garage as described in claim 5 wherein each of said base connectors has three splines mounted 90° apart, each for accepting one of said wall bases in a T-arrangement. 9. A portable garage as described in claim 5 wherein each of said base connectors has four splines mounted 90° apart, for accepting up to four of said wall bases. 10. A portable garage as described in claim 5 wherein said spline is mountable to and demountable from said corresponding one of said base connectors. 11. A portable garage as described in claim 5 wherein said one of said base connectors further comprises: a fixed spline molded thereinto; three lands adapted for mounting one or more additional splines at 90° and 180° from said fixed spline. 12. A portable shelter mountable on the surface of a site, said portable shelter assembled from interlocking components for assemblage on said site and for disassemblage and re-assemblage on another site, said portable shelter for protecting an automobile comprising: a wall base with a lower face adapted for emplacement on said surface of said site, said wall base being an elongated body molded from a thermoplastic material and having a cavity therewithin adapted to receive ballast, said wall base, in turn, comprising: an upper wall base portion having extensions extending longitudinally beyond said lower face; a keyway in said extension of said upper wall base portion adapted to interlock with a spline-containing component; a base connector having a stepped configuration molded from a thermoplastic material and, when placed in an abutting relation with said wall base, said upper wall base portion is adapted to overhang a step of said base connector, said base connector, in turn, further comprising: an upper base connector portion having a spline molded thereinto, said spline adapted to interlock with said keyway of said wall base; an open-ended sleeve member molded into and substantially vertically disposed within said base connector; and, a support member disposed in said sleeve member and adapted to support wall and roof components; whereby, upon filling said wall base with ballast the structure becomes stabilized without an excavated foundation. 13. A portable shelter as described in claim 12 wherein said upper base connector is substantially square in cross-section with said molded spline protruding from one face thereof and attachment sites on the remaining faces adapted for mountable additional splines; and wherein said sleeve member is a square metal tube with the sides thereof parallel to said faces of said upper base connector portion. 14. A portable shelter as described in claim 13 wherein said support member is in telescopic relation to said sleeve member and is attachable thereto, and wherein said portable shelter further comprises a screw boss along the length and central to each face of said support member enabling the adjustable attachment to said sleeve member; one or more mountable splines adapted for mounting at selected ones of said attachment sites adjacent to and opposite of said molded spline enabling a 90° corner and a straight wall connector arrangement, and a T-connector arrangement. 15. A portable shelter as described in claim 12 wherein said base connector further comprises a plurality of jacking screws mounted on said lower surface thereof, said jacking screws threadably engageable to level said base connector and,