Auxiliary thermal storage heating and air conditioning system for a motor vehicle

• US 6,276,166 B1
• Filed: 07/20/1999
• Issued: 08/21/2001
• Est. Priority Date: 07/20/1999
• Status: Expired due to Term

• Current Assignee: Rocky Research (Honeywell International Inc.)
• Original Assignee: Rocky Research (Honeywell International Inc.)
• Inventors: Sarkisian, Paul, Khalili, Kaveh, Rockenfeller, Uwe, Kirol, Lance
• Primary Examiner(s): Doerrler, William
• Assistant Examiner(s): SHULMAN, MARK S
• Application Number:
  US09/357,696
• Time in Patent Office: 763 Days
• Field of Search: 622/383, 624/76, 621/12, 624/80
• US Class Current: 62/480
• CPC Class Codes: B60H 1/00492 comprising regenerative heating or cooling means, e.g. heat accumulators
• CPC Class Codes: F25B 17/08 the absorbent or adsorbent being a solid, e.g. salt F25B17/12 takes precedence

Abstract

An auxiliary thermal storage heating and air conditioning system having an output for selectively delivering warm and cool air to the passenger area of a motor vehicle incorporates a reactor containing a metal salt or a complex compound formed by absorbing a polar gas refrigerant on a metal salt comprising a halide, nitrate, nitrite, oxalate, perchlorate, sulfate or sulfite of an alkali metal, alkaline earth metal, transition metal, zinc, cadmium, tin or aluminum, or sodium borofluoride or a double metal halide. In a preferred embodiment, the reactor contains a sorbent/substrate composition comprising a substrate material inert to the polar gas and incorporating the salt or the complex compound. One embodiment utilizes apparatus having a heat exchanger which selectively functions as an evaporator for a cooling mode and a condenser for a heating mode, and inside and outside coils for transferring system generated thermal energy. Another embodiment of the system uses a refrigerant circulatory system having a circuitous refrigerant line and an evaporator and condenser serially disposed within the circuitous line and a multi-channel ventilation system having a blower for forcing air through the channels of the system and to the output, the channels communicating with the evaporator, the condenser, and the reactor.

Claims

1. An auxiliary heating and air conditioning system having an output for selectively delivering warm and cool air to the passenger area of a motor vehicle comprising:

a refrigerant circulatory system having a circuitous refrigerant line and an evaporator and condenser serially disposed within the circuitous line operative to vaporize and condense a refrigerant fluid therein, respectively,

one or more reactors comprising heat exchange surfaces having space therebetween containing a metal salt or a complex compound formed by absorbing a polar gas refrigerant on a metal salt, said metal salt comprising a halide, nitrate, nitrite, oxalate, perchlorate, sulfate or sulfite of an alkali metal, alkaline earth metal, transition metal, zinc, cadmium, tin or aluminum, or sodium borofluoride or a double metal halide, said reactor in communication with the refrigerant line for delivering said refrigerant to said reactor for being absorbed and desorbed therein,

a heater in thermal communication with said metal salt and said complex compound, and

a multi-channel ventilation system having a blower for forcing air through the channels of the system and to the output, said channels communicating with the evaporator, the condenser, and the reactor.

2. A system of claim 1 wherein the reactor has the space between at least a portion of the heat exchange surfaces substantially filled with a sorbent/substrate composition comprising a substrate material inert to said polar gas and incorporating said salt or mixtures of two or more thereof, or said complex compound.

3. A system of claim 2 wherein said substrate material has a porosity of between about 50% and about 98% prior to incorporating said metal salt.

4. A system of claim 2 wherein said substrate material comprises yarn, rope, felt or fabric.

5. A system of claim 3 wherein said substrate material comprises yarn, rope, felt or fabric.

6. A system of claim 2 wherein said metal salt or complex compound comprises at least 50%, by volume, of said sorbent/substrate composition.

7. A system of claim 2 wherein said metal salt or complex compound comprises at least 70%, by volume, of said sorbent/substrate composition.

8. A system of claim 2 wherein said metal salt or complex compound comprises at least 85%, by volume, of said sorbent/substrate composition.

9. A system of claim 3 wherein said substrate material is a woven material.

10. A system of claim 2 in which the polar gas is ammonia.

11. A system of claim 2 in which the polar gas is water, an amine, an alcohol or ammonia.

12. A system of claim 2 in which the salt is a mixture of alkali, alkaline earth, or transition metal salts.

13. A system of claim 2 comprising a finned tube or plate heat exchanger.

14. A system of claim 2 having a mean mass diffusion path length of 15 mm or less.

15. A system of claim 2 having a thermal diffusion path length of 4 mm or less.

16. A system of claim 2 in which the substrate material comprises glass fiber.

17. A system of claim 2 in which the substrate material comprises polyphenylene sulfide.

18. A system of claim 2 in which the substrate material comprises aromatic polyamide or nylon.

19. A system of claim 5 in which the substrate material comprises glass fiber.

20. A system of claim 5 in which the substrate material comprises polyphenylene sulfide.

21. A system of claim 5 in which the substrate material comprises aromatic polyamide or nylon.

22. The system of claim 1 including a blower valve within the multi-channel ventilation system for directing air flow from the blower across the condenser, during a charging cycle.

23. The system of claim 22 wherein the blower valve is operative to direct air flow from the blower across both the evaporator and the reactor during a discharge cycle, wherein the air passing across the reactor is heated and the air passing across the evaporator is cooled.

24. The system of claim 23 including an output valve operative to controllably direct air passing across the reactor to a passenger area of the motor vehicle and to ambient space outside the passenger area.

25. The system of claim 24 wherein the output valve is further operative to controllably direct air passing across the evaporator to the passenger area of the motor vehicle and to ambient space outside the passenger area.

26. The system of claim 1 wherein said heater comprises an electric heater.

27. The system of claim 1 wherein said heater comprises a heating element in fluid communication with the vehicle coolant system.

28. The system of claim 1 wherein said heater comprises a heating element in fluid communication with the vehicle oil system.

29. The system of claim 1 wherein said heater comprises a fuel fired heater.

30. The system of claim 29 wherein the heater is fired by diesel fuel and including a diesel fuel tank for supplying diesel fuel to said heater and to the engine of the motor vehicle.

31. The system of claim 29 wherein the heater is propane fired and includes a propane tank for supplying fuel thereto.

32. The system of claim 29 wherein the heater is gasoline fired and includes a gasoline tank for supplying fuel to said heater and to the engine of the motor vehicle.

33. The system of claim 2 wherein said complex compound is formed by restricting the volumetric expansion thereof during said absorption of said polar gas refrigerant on said metal salt.

57. A system of claim 1 including apparatus for preheating the vehicle engine before starting the vehicle comprising:

a coolant line in communication with the reactor and the vehicle engine,

a heat exchanger for transferring thermal energy stored in the complex compound to the coolant line, and

a fluid pump serially disposed within the coolant line for communicating coolant fluid therethrough,

whereby thermal energy transferred from the complex compound to the coolant line is then circulated through the engine to preheat the engine before starting.

58. A system of claim 57 wherein the reactor has the space between at least a portion of the heat exchange surfaces substantially filled with a sorbent/substrate composition comprising a substrate material inert to said polar gas and incorporating said salt or mixtures of two or more thereof, or said complex compound.

59. The system of claim 58 wherein said complex compound is formed by restricting the volumetric expansion thereof during said absorption of said polar gas refrigerant on said metal salt.

34. An auxiliary heating and air conditioning system having an output for selectively delivering warm and cool air to the passenger area of a motor vehicle comprising:

one or more reactors comprising beat exchange surfaces having space therebetween containing a metal salt or a complex compound formed by absorbing a polar gas refrigerant on a metal salt, said metal salt comprising a halide, nitrate, nitrite, oxalate, perchlorate, sulfate or sulfite of an alkali metal, alkaline earth metal, transition metal, zinc, cadmium, tin or aluminum, or sodium borofluoride or a double metal halide, and a heater in thermal communication with said metal salt and said complex compound,

a heat exchanger for selectively operating as a condenser and an evaporator, respectively, a first heat exchange coil in heat transfer communication with the passenger area of a motor vehicle, and a second heat exchange coil for transferring thermal energy outside of the passenger area,

first piping communicating with the reactor, the heat exchanger, the first heat exchange coil and the second heat exchange coil for directing heat transfer fluid therebetween, and

second piping for directing refrigerant between said reactor and said heat exchanger.

35. A system of claim 34 including one or more pumps cooperating with said first piping for pumping said heat transfer fluid therein.

36. A system of claim 35 including one or more valves cooperating with said first piping for selectively directing said heat transfer fluid between the heat exchanger, the reactor and the first and second heat exchange coils.

37. A system of claim 34 wherein the reactor has the space between at least a portion of the heat exchange surfaces substantially filled with a sorbent/substrate composition comprising a substrate material inert to said polar gas and incorporating said salt or mixtures of two or more thereof, or said complex compound.

38. A system of claim 37 wherein said substrate material has a porosity of between about 50% and about 98% prior to incorporating said metal salt.

39. A system of claim 37 wherein said substrate material comprises yarn, rope, felt or fabric.

40. A system of claim 38 wherein said substrate material comprises yarn, rope, felt or fabric.

41. A system of claim 37 wherein said metal salt or complex compound comprises at least 50%, by volume, of said sorbent/substrate composition.

42. A system of claim 37 wherein said metal salt or complex compound comprises at least 70%, by volume, of said sorbent/substrate composition.

43. A system of claim 37 wherein said metal salt or complex compound comprises at least 85%, by volume, of said sorbent/substrate composition.

44. A system of claim 38 wherein said substrate material is a woven material.

45. A system of claim 37 in which the polar gas is ammonia.

46. A system of claim 37 in which the polar gas is water, an amine, an alcohol or ammonia.

47. A system of claim 37 in which the salt is a mixture of alkali, alkaline earth, or transition metal salts.

48. A system of claim 37 comprising a finned tube or plate heat exchanger.

49. A system of claim 37 having a mean mass diffusion path length of 15 mm or less.

50. A system of claim 37 having a thermal diffusion path length of 4 mm or less.

51. A system of claim 37 in which the substrate material comprises glass fiber.

52. A system of claim 37 in which the substrate material comprises polyphenylene sulfide.

53. A system of claim 37 in which the substrate material comprises aromatic polyamide or nylon.

54. A system of claim 40 in which the substrate material comprises glass fiber.

55. A system of claim 40 in which the substrate material comprises polyphenylene sulfide.

56. A system of claim 40 in which the substrate material comprises aromatic polyamide or nylon.

60. An auxiliary heating and air conditioning system having an output for selectively delivering warm and cool air to the passenger area of a motor vehicle comprising:

a refrigerant circulatory system having a circuitous refrigerant line and an evaporator and condenser serially disposed within the circuitous line operative to vaporize and condense a refrigerant fluid therein, respectively,

one or more reactors comprising heat exchange surfaces having space between at least a portion of the heat exchange surfaces substantially filled with a sorbent/substrate composition comprising a substrate material inert to said polar gas having a metal salt or mixtures of two or more thereof or a complex compound formed by absorbing a polar gas refrigerant on a metal salt, said metal salt comprising a halide, nitrate, nitrite, oxalate, perchlorate, sulfate or sulfite of an alkali metal, alkaline earth metal, transition metal, zinc, cadmium, tin or aluminum, or sodium borofluoride or a double metal halide embedded or impregnated therein, said reactor in communication with the refrigerant line for delivering said refrigerant to said reactor for being absorbed and desorbed therein,

a heater in thermal communication with said metal salt and said complex compound, and

a multi-channel ventilation system having a blower for forcing air through the channels of the system and to the output, said channels communicating with the evaporator, the condenser, and the reactor.

61. A system of claim 60 wherein said substrate material has a porosity of between about 50% and about 98% prior to embedding or impregnating said metal salt.

62. A system of claim 60 wherein said substrate material comprises yarn, rope, felt or fabric.

63. A system of claim 60 wherein said metal salt or complex compound comprises at least 50%, by volume, of said sorbent/substrate composition.

64. A system of claim 60 wherein said metal salt or complex compound comprises at least 70%, by volume, of said sorbent/substrate composition.

65. A system of claim 60 wherein said metal salt or complex compound comprises at least 85%, by volume, of said sorbent/substrate composition.

66. A system of claim 61 wherein said substrate material is a woven material.

67. A system of claim 60 in which the polar gas is ammonia.

68. A system of claim 60 in which the polar gas is water, an amine, an alcohol or ammonia.

69. A system of claim 60 in which the salt is a mixture of alkali, alkaline earth, or transition metal salts.

70. A system of claim 60 comprising a finned tube or plate heat exchanger.

71. A system of claim 60 having a mean mass diffusion path length of 15 mm or less.

72. A system of claim 60 having a thermal diffusion path length of 4 mm or less.

73. A system of claim 60 in which the substrate material comprises glass fiber.

74. A system of claim 60 in which the substrate material comprises polyphenylene sulfide.

75. A system of claim 60 in which the substrate material comprises aromatic polyamide or nylon.

76. A system of claim 62 in which the substrate material comprises glass fiber.

77. A system of claim 62 in which the substrate material comprises polyphenylene sulfide.

78. A system of claim 62 in which the substrate material comprises aromatic polyamide or nylon.

79. The system of claim 60 including a blower valve within the multi-channel ventilation system for directing air flow from the blower across the condenser during a charging cycle.

80. The system of claim 79 wherein the blower valve is operative to direct air flow from the blower across both the evaporator and the reactor during a discharge cycle, wherein the air passing across the reactor is heated and the air passing across the evaporator is cooled.

81. The system of claim 80 including an output valve operative to controllably direct air passing across the reactor to a passenger area of the motor vehicle and to ambient space outside the passenger area.

82. The system of claim 81 wherein the output valve is further operative to controllably direct air passing across the evaporator to the passenger area of the motor vehicle and to ambient space outside the passenger area.

83. The system of claim 60 wherein said heater comprises an electric heater.

84. The system of claim 60 wherein said heater comprises a heating element in fluid communication with the vehicle coolant system.

85. The system of claim 60 wherein said heater comprises a heating element in fluid communication with the vehicle oil system.

86. The system of claim 60 wherein said heater comprises a fuel fired heater.

87. The system of claim 86 wherein the heater is fired by diesel fuel and including a diesel fuel tank for supplying diesel fuel to said heater and to the engine of the motor vehicle.

88. The system of claim 86 wherein the heater is propane fired and includes a propane tank for supplying fuel thereto.

89. The system of claim 86 wherein the heater is gasoline fired and includes a gasoline tank for supplying fuel to said heater and to the engine of the motor vehicle.

90. The system of claim 60 wherein said complex compound is formed by restricting the volumetric expansion thereof during said absorption of said polar gas refrigerant on said metal salt.

91. A system of claim 60 including apparatus for preheating the vehicle engine before starting the vehicle comprising:

a coolant line in communication with the reactor and the vehicle engine,

a heat exchanger for transferring thermal energy stored in the complex compound to the segment of the coolant line, and

a fluid pump serially disposed within the coolant line for directing coolant fluid therethrough,

whereby thermal energy transferred from the complex compound to the coolant line is then circulated through the engine to preheat the engine before starting.

92. An auxiliary heating and air conditioning system having an output for selectively delivering warm and cool air to the passenger area of a motor vehicle comprising:

one or more reactors comprising heat exchange surfaces having space between at least a portion of the heat exchange surfaces substantially filled with a sorbent/substrate composition comprising a substrate material inert to said polar gas having a metal salt or mixture of two or more thereof or a complex compound formed by absorbing a polar gas refrigerant on a metal salt, said metal salt comprising a halide, nitrate, nitrite, oxalate, perchlorate, sulfate or sulfite of an alkali metal, alkaline earth metal, transition metal, zinc, cadmium, tin or aluminum, or sodium borofluoride or a double metal halide embedded or impregnated therein, and a heater in thermal communication with said metal salt and said complex compound,

a heat exchanger for selectively operating as a condenser and an evaporator, respectively, a first heat exchange coil in heat transfer communication with the passenger area of a motor vehicle, and a second heat exchange coil for transferring thermal energy outside of the passenger area,

first piping communicating with the reactor, the heat exchanger, the first heat exchange coil and the second heat exchange coil for directing heat transfer fluid therebetween, and

second piping for directing refrigerant between said reactor and said heat exchanger.

93. A system of claim 92 including one or more pumps cooperating with said first piping for pumping said heat transfer fluid therein.

94. A system of claim 93 including one or more valves cooperating with said first piping for selectively directing said heat transfer fluid between the heat exchanger, the reactor and the first and second heat exchange coils.

95. A system of claim 92 wherein said substrate material has a porosity of between about 50% and about 98% prior to embedding or impregnating said metal salt.

96. A system of claim 92 wherein said substrate material comprises yarn, rope, felt or fabric.

97. A system of claim 95 wherein said substrate material comprises yarn, rope, felt or fabric.

98. A system of claim 92 wherein said metal salt or complex compound comprises at least 50%, by volume, of said sorbent/substrate composition.

99. A system of claim 92 wherein said metal salt or complex compound comprises at least 70%, by volume, of said sorbent/substrate composition.

100. A system of claim 92 wherein said metal salt or complex compound comprises at least 85%, by volume, of said sorbent/substrate composition.

101. A system of claim 95 wherein said substrate material is a woven material.

102. A system of claim 92 in which the polar gas is ammonia.

103. A system of claim 92 in which the polar gas is water, an amine, an alcohol or ammonia.

104. A system of claim 92 in which the salt is a mixture of alkali, alkaline earth, or transition metal salts.

105. A system of claim 92 comprising a finned tube or plate heat exchanger.

106. A system of claim 92 having a mean mass diffusion path length of 15 mm or less.

107. A system of claim 92 having a thermal diffusion path length of 4 mm or less.

108. A system of claim 92 in which the substrate material comprises glass fiber.

109. A system of claim 92 in which the substrate material comprises polyphenylene sulfide.

110. A system of claim 92 in which the substrate material comprises aromatic polyamide or nylon.

111. A system of claim 97 in which the substrate material comprises glass fiber.

112. A system of claim 97 in which the substrate material comprises polyphenylene sulfide.

113. A system of claim 97 in which the substrate material comprises aromatic polyamide or nylon.