PRESSURE COMPENSATED FLOW RATE CONTROLLER WITH BTU METER
    1.
    发明申请
    PRESSURE COMPENSATED FLOW RATE CONTROLLER WITH BTU METER 审中-公开
    压力补偿流量控制器与BTU表

    公开(公告)号:WO2012099895A1

    公开(公告)日:2012-07-26

    申请号:PCT/US2012/021584

    申请日:2012-01-17

    Abstract: Apparatus, systems, and methods related to a constant-flow control valve and BTU meter assembly that has a pressure independent, constant-flow control valve assembly connectable to the fluid-based heating or cooling system. A valve stem is connected to a valve member and is rotatable as a unit relative to a valve body to change the position of valve member to change a fluid flow rate through the valve. The valve member's position relative to the fluid path is directly related to the fluid flow rate. Pressure sensors measure the pressure of fluid entering and exiting the valve body. A BTU meter assembly is connected to the valve stem, which is rotatable relative to the BTU meter assembly. A position sensor of the BTU meter assembly detects a rotational position of the valve stem relative to the BTU body. A controller of the BTU meter assembly is coupleable to the position sensor, the pressure sensors, and the temperature sensors, and the controller determines the fluid flow rate based upon the pressure drop across the valve assembly and the rotational position of the valve stem. The controller also determines energy usage of the heating or cooling device based upon the flow rate and the temperature change across the heating or cooling device.

    Abstract translation: 与恒流控制阀和BTU仪表组件相关的装置,系统和方法,其具有可连接到基于流体的加热或冷却系统的独立于压力的恒流控制阀组件。 阀杆连接到阀构件并且可相对于阀体作为单元旋转以改变阀构件的位置以改变通过阀的流体流速。 阀构件相对于流体路径的位置与流体流速直接相关。 压力传感器测量进入和离开阀体的流体的压力。 BTU仪表组件连接到阀杆,阀杆可相对于BTU表组件旋转。 BTU仪表组件的位置传感器检测阀杆相对于BTU体的旋转位置。 BTU仪表组件的控制器可耦合到位置传感器,压力传感器和温度传感器,并且控制器基于阀组件上的压降和阀杆的旋转位置来确定流体流量。 控制器还基于加热或冷却装置的流量和温度变化来确定加热或冷却装置的能量消耗。

    METHOD AND SYSTEM FOR CONTROLLING FLUID DELIVERY IN A FUEL CELL
    3.
    发明申请
    METHOD AND SYSTEM FOR CONTROLLING FLUID DELIVERY IN A FUEL CELL 审中-公开
    用于控制燃料电池中流体输送的方法和系统

    公开(公告)号:WO2006017375A3

    公开(公告)日:2006-11-09

    申请号:PCT/US2005026924

    申请日:2005-07-29

    Abstract: The invention relates to micro fuel cell systems whose performance is enhanced by an accurate fluid delivery system. The fluid delivery system improves reactant fluid provision to meet electrical output, while maintaining correct stoichiometries for chemical processing in a downstream reactor. The fluid delivery system includes a pressure source and a differential flow meter. The differential flow meter uses a flow restrictor and a sensor. The pressure source moves a fluid through the flow restrictor; the sensor detects differential pressure in the flow restrictor and outputs a signal that permits dynamic control of fluid flow, e.g., by controlling a pump.

    Abstract translation: 本发明涉及通过精确的流体输送系统提高其性能的微型燃料电池系统。 流体输送系统改善反应物流体供应以满足电力输出,同时保持下游反应器中化学处理的正确化学计量。 流体输送系统包括压力源和差动流量计。 差分流量计使用流量限制器和传感器。 压力源使流体移动通过限流器; 传感器检测限流器中的差压,并输出允许动态控制流体流动的信号,例如通过控制泵。

    FLOW CONTROL APPARATUS AND METHOD FOR FUEL CELL FLOW FIELDS
    7.
    发明申请
    FLOW CONTROL APPARATUS AND METHOD FOR FUEL CELL FLOW FIELDS 审中-公开
    流量控制装置和燃料电池流场的方法

    公开(公告)号:WO2005121917A1

    公开(公告)日:2005-12-22

    申请号:PCT/CA2005/000913

    申请日:2005-06-10

    Abstract: An adjustable flow field and flow regulation method for an electrochemical device such as a fuel cell is described. The flow field preferably includes a plurality of flow paths between an inlet and an outlet and a plurality of microvalves for regulating fluid flow through the flow paths in response to changes in the operating states of the fuel cell, such as changes in power output or temperature. For example, adjustment of the microvalves may restrict the number of flow paths through which fluid is flowing to alter the effective active area and current density of the flow field. The valves may be selectively opened or closed, either entirely or partially, to maintain a minimum pressure drop between the inlet and outlet. Alternatively or additionally, adjustment of the valves may alter the direction of fluid flow through at least some of the flow paths. The invention improves the stability of the fuel cell in low power and low reactant stoichiometry operating states without significantly increasing the complexity of the system or increasing parasitic loads. For example, the invention may improve water management in low power modes and avoid related performance problems such as low current density failures and voltage oscillations. The invention may also help reduce the cost and complexity of the system power electronics.

    Abstract translation: 描述了用于诸如燃料电池的电化学装置的可调节流场和流量调节方法。 流场优选地包括在入口和出口之间的多个流动路径和用于响应于燃料电池的操作状态的变化(例如功率输出或温度的变化)调节流过流动路径的流体的多个微型阀 。 例如,微阀的调节可以限制流体流过的流动路径的数量,以改变流场的有效有效面积和电流密度。 阀可以选择性地打开或关闭,完全或部分地,以保持入口和出口之间的最小压降。 或者或另外,阀的调节可以改变通过至少一些流动路径的流体流动的方向。 本发明在低功率和低反应物化学计量运行状态下提高燃料电池的稳定性,而不显着增加系统的复杂性或增加寄生负载。 例如,本发明可以改善低功率模式下的水管理,并避免诸如低电流密度故障和电压振荡等相关性能问题。 本发明还可以帮助降低系统电力电子设备的成本和复杂性。

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