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4450798 Engine intake valve with heat pipe
vi
New Patents
which is filled with ethane which is both in the liquid and vapor phases. The system comprises two heat exchanging apparatuses (13, 9) which are in fluid communication with each other, of which the first (13) supplies heat to the ethane by means of heat exchange with water from a relatively warmer water layer, while the other (9) removes heat from the ethane by means of heat exchange with water from a colder water layer, whereby a difference in pressure is created in the system which is utilized to take energy out of the system. In order to make the system large enough and the ethane pressure high enough to give a reasonable power yield, the heat exchanging apparatuses are placed in respective chambers (5, 4) which are comprised by cavities in solid or consolidated rock (1). The necessary fluid communications (6, 17) and water pipes (10, 12, 15, 16) are also blasted in the rock with fluid cross-sections large enough to make pressure losses small.
evaporates liquified refrigerant collected in a collector of the loop in the previous cycle of operation which vapor together with gravity acting on the free piston cause the piston to compress vaporized refrigerant of the other loop in the lower chamber. This compressed refrigerant is condensed by loss of heat to an associated heat sink and is collected in the collector of its loop. In the second cycle, liquified refrigerant in the collector of the loop including the lower chamber is vaporized in its evaporator by absorbing heat from its associated heat source. The vaporized refrigerant acts on the free piston to cause it to compress vaporized refrigerant in the upper chamber which refrigerant is condensed in its loop condenser and collected in its collector. Controls are provided to initiate the next cycle of operation at the completion of the preceding cycle.
4450798 4450690 THERMALLY POWERED, GRAVITATIONALLY ASSISTED HEAT TRANSFER SYSTEMS
ENGINE INTAKE VALVE WITH HEAT PIPE Alfred J Jessel assigned to Chevron Research Company
Robert W Clark /-.
F
,
L:ILT 4, hl
r
~
-zA
~'~lil. ?t,H i',lil,',l,ll=l I! ~-1 ~
Method and apparatus for transferring heat. A pair of closed loop heat transfer loops each includes a refrigerant, a condenser to remove heat from the refrigerant, and an evaporator which adds heat to the refrigerant from its associated heat source. Each loop also includes a chamber of a compressor which has a free piston common to both chambers. One of the chambers is located above the other so that in one of the two cycles of operation, thermal energy from a heat source of the loop including the upper chamber
42
An internal combustion engine intake valve with an internal heat pipe. The valve stem and valve head are hollow and have a wicking material fixed to the internal hollow surface. A coolant material is contained within the hollow valve. A heat exchanger is provided on the outer surface of the stem at the valve operator end. The portion of the valve in the fuel intake system is maintained at a temperature that will prevent the addition of heat to the fuel charge from the valve thus reducing the possibility of autoignition due to heating of the fuel charge.
New Patents
which is filled with ethane which is both in the liquid and vapor phases. The system comprises two heat exchanging apparatuses (13, 9) which are in fluid communication with each other, of which the first (13) supplies heat to the ethane by means of heat exchange with water from a relatively warmer water layer, while the other (9) removes heat from the ethane by means of heat exchange with water from a colder water layer, whereby a difference in pressure is created in the system which is utilized to take energy out of the system. In order to make the system large enough and the ethane pressure high enough to give a reasonable power yield, the heat exchanging apparatuses are placed in respective chambers (5, 4) which are comprised by cavities in solid or consolidated rock (1). The necessary fluid communications (6, 17) and water pipes (10, 12, 15, 16) are also blasted in the rock with fluid cross-sections large enough to make pressure losses small.
evaporates liquified refrigerant collected in a collector of the loop in the previous cycle of operation which vapor together with gravity acting on the free piston cause the piston to compress vaporized refrigerant of the other loop in the lower chamber. This compressed refrigerant is condensed by loss of heat to an associated heat sink and is collected in the collector of its loop. In the second cycle, liquified refrigerant in the collector of the loop including the lower chamber is vaporized in its evaporator by absorbing heat from its associated heat source. The vaporized refrigerant acts on the free piston to cause it to compress vaporized refrigerant in the upper chamber which refrigerant is condensed in its loop condenser and collected in its collector. Controls are provided to initiate the next cycle of operation at the completion of the preceding cycle.
4450798 4450690 THERMALLY POWERED, GRAVITATIONALLY ASSISTED HEAT TRANSFER SYSTEMS
ENGINE INTAKE VALVE WITH HEAT PIPE Alfred J Jessel assigned to Chevron Research Company
Robert W Clark /-.
F
,
L:ILT 4, hl
r
~
-zA
~'~lil. ?t,H i',lil,',l,ll=l I! ~-1 ~
Method and apparatus for transferring heat. A pair of closed loop heat transfer loops each includes a refrigerant, a condenser to remove heat from the refrigerant, and an evaporator which adds heat to the refrigerant from its associated heat source. Each loop also includes a chamber of a compressor which has a free piston common to both chambers. One of the chambers is located above the other so that in one of the two cycles of operation, thermal energy from a heat source of the loop including the upper chamber
42
An internal combustion engine intake valve with an internal heat pipe. The valve stem and valve head are hollow and have a wicking material fixed to the internal hollow surface. A coolant material is contained within the hollow valve. A heat exchanger is provided on the outer surface of the stem at the valve operator end. The portion of the valve in the fuel intake system is maintained at a temperature that will prevent the addition of heat to the fuel charge from the valve thus reducing the possibility of autoignition due to heating of the fuel charge.