Exhaust heat regeneration system
A heat exhaust regeneration and refrigerant technology, which is applied to steam engine devices, combined combustion mitigation, mechanical equipment, etc., can solve the problems that the heat exhaust regeneration system cannot operate normally at the beginning, so as to achieve proper operation and prevent the effect of efficiency reduction
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Embodiment approach 1
[0030] figure 1 It is a configuration diagram showing the exhaust heat regeneration system according to Embodiment 1 of the present invention. In Embodiment 1, the exhaust heat regeneration system of the present invention is used in an automotive engine 1 (hereinafter referred to as engine 1 ). The engine 1 is an internal combustion engine that generates driving force for traveling. The exhaust pipe 2 discharges combustion gas (exhaust gas) discharged from the engine 1 into the atmosphere. Engine cooling water is circulated in the cooling water circuit 3 by a cooling water pump (not shown).
[0031] The Rankine cycle 5 constitutes a closed circuit in which the cooling water / exhaust heat exchanger 4 is sequentially connected to an expander 7 , a condenser 8 , and a refrigerant pump 6 . In this closed circuit, the flow path from the expander 7 through the condenser 8 to the refrigerant pump 6 is defined as the low-pressure circuit part 5a along the flow direction of the refri...
Embodiment approach 2
[0046] In Embodiment 1, the temperature adjustment mechanism 13 was used as a method of filling the Rankine cycle 5 with refrigerant from the refrigerant tank 12 , but in Embodiment 2, the temperature adjustment mechanism 13 provided in the refrigerant filling amount adjustment device 9 is used. Refrigerant delivery mechanism. figure 2 It is a configuration diagram showing an exhaust heat regeneration system according to Embodiment 2 of the present invention. refer to figure 2 The refrigerant charge adjustment device 9 according to Embodiment 2 will be described. In addition, in the following description, the refrigerant pump 14 will be used as the refrigerant transport mechanism.
[0047] In the low-pressure circuit part 5a, the inlet side of the condenser 8 is connected with the low-pressure side valve 10 by piping. The low-pressure side valve 10 is normally closed. The low-pressure side valve 10 is connected to the liquid layer portion of the refrigerant in the refrig...
Embodiment approach 3
[0054] In Embodiment 3, the operation of the exhaust heat regeneration system when the Rankine cycle 5 is stopped will be described. Since the configuration of the exhaust heat regeneration system according to Embodiment 3 of the present invention is the same as that of Embodiment 1 or Embodiment 2, description thereof will be omitted.
[0055] The exhaust heat regeneration system of Embodiment 3 opens the low-pressure side valve 10 when the Rankine cycle 5 is stopped, injects the refrigerant stored in the refrigerant tank 12 into the Rankine cycle 5, and stops it. Alternatively, the refrigerant stored in the refrigerant tank 12 is injected into the Rankine cycle 5 after the Rankine cycle 5 is stopped (while the Rankine cycle 5 is stopped). At this time, the filling amount of the refrigerant in the Rankine cycle 5 is the maximum or exceeds a predetermined amount. Here, the predetermined amount refers to the charge amount of refrigerant capable of starting the Rankine cycle 5 ...
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