公开(公告)号：US09920713B2

公开(公告)日：2018-03-20

申请号：US14777161

申请日：2014-03-11

Applicant: Westport Power Inc.

Inventor： Gregory A. Batenburg ,  Jason J. Coatta

IPC: F02B39/04 ,  F02M21/06 ,  F02M21/02 ,  F23K5/22 ,  F17C7/04 ,  F23K5/00 ,  F02M31/18 ,  F17C9/02 ,  F02B1/04 ,  F02B43/10 ,  F28F27/00

CPC classification number: F02M21/06 ,  F02B1/04 ,  F02B43/10 ,  F02B2043/103 ,  F02M21/02 ,  F02M21/0218 ,  F02M21/0287 ,  F02M21/029 ,  F02M31/183 ,  F17C7/04 ,  F17C9/02 ,  F17C2227/0135 ,  F17C2227/0142 ,  F17C2250/0631 ,  F23K5/002 ,  F23K5/22 ,  F23K2401/10 ,  F23K2401/20 ,  F23K2900/01041 ,  F28F27/00 ,  Y02T10/126 ,  Y02T10/16 ,  Y02T10/32

Abstract: A reciprocating piston cryogenic pump has been suspended from stroking when process fluid discharge temperature from a vaporizer dropped below a threshold to prevent freezing of a heat exchange fluid circulating through the vaporizer and damage to downstream components. Suspension of the pump results in a decrease of process fluid pressure downstream of the vaporizer, which is undesirable. In the present technique, a temperature is monitored correlating to process fluid temperature downstream of the vaporizer. The amount of process fluid discharged from the pump in each cycle is adjusted as a function of the temperature such that the average residence time of the process fluid in the vaporizer is increased as the discharge amount decreases, increasing process fluid discharge temperature. The average mass flow rate of the process fluid through the vaporizer is unchanged regardless of pump discharge amount such that process fluid pressure downstream of the vaporizer is maintained.

公开(公告)号：US20160025042A1

公开(公告)日：2016-01-28

申请号：US14777161

申请日：2014-03-11

Applicant: WESTPORT POWER INC.

Inventor： Gregory A. Batenburg ,  Jason J. Coatta

IPC: F02M21/06 ,  F23K5/00 ,  F17C9/02 ,  F02M21/02 ,  F02M31/18

CPC classification number: F02M21/06 ,  F02B1/04 ,  F02B43/10 ,  F02B2043/103 ,  F02M21/02 ,  F02M21/0218 ,  F02M21/0287 ,  F02M21/029 ,  F02M31/183 ,  F17C7/04 ,  F17C9/02 ,  F17C2227/0135 ,  F17C2227/0142 ,  F17C2250/0631 ,  F23K5/002 ,  F23K5/22 ,  F23K2401/10 ,  F23K2401/20 ,  F23K2900/01041 ,  F28F27/00 ,  Y02T10/126 ,  Y02T10/16 ,  Y02T10/32

Abstract: A reciprocating piston cryogenic pump has been suspended from stroking when process fluid discharge temperature from a vaporizer dropped below a threshold to prevent freezing of a heat exchange fluid circulating through the vaporizer and damage to downstream components. Suspension of the pump results in a decrease of process fluid pressure downstream of the vaporizer, which is undesirable. In the present technique, a temperature is monitored correlating to process fluid temperature downstream of the vaporizer. The amount of process fluid discharged from the pump in each cycle is adjusted as a function of the temperature such that the average residence time of the process fluid in the vaporizer is increased as the discharge amount decreases, increasing process fluid discharge temperature. The average mass flow rate of the process fluid through the vaporizer is unchanged regardless of pump discharge amount such that process fluid pressure downstream of the vaporizer is maintained.

Abstract translation: 当来自蒸发器的过程流体排放温度降到阈值以下时，往复活塞式低温泵已经悬挂在不动作中，以防止通过蒸发器循环的热交换流体的冷冻并损坏下游部件。 泵的悬挂导致蒸发器下游的工艺流体压力降低，这是不期望的。 在本技术中，监测与蒸发器下游的处理流体温度相关的温度。 调整每个循环中从泵排出的工艺流体的量作为温度的函数，使得随着排出量减少，处理流体在蒸发器中的平均停留时间增加，从而提高了处理流体排放温度。 不管泵排出量如何，通过蒸发器的过程流体的平均质量流量是不变的，从而维持蒸发器下游的过程流体压力。