Integrated load bank and exhaust heater system with load shed capability for a diesel genset exhaust aftertreatment system
First Claim
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1. A method of distributing power from a genset having an output power capacity to an electrical load powered by the genset and to a load bank/heater in an exhaust after treatment (AT) system coupled to the genset, the method including:
- delivering power from the genset to the electrical load;
delivering power from the genset to the load bank/heater to heat exhaust from the genset;
monitoring power demand on the genset while delivering power to the electrical load and the load bank/heater;
determining whether the power demand of the electrical load is increasing at a high rate of change, wherein the high rate of change indicates that the power demand of the electrical load is projected to become greater than at least one of a selected output power capacity and a genset output power capacity; and
reducing the amount of power applied to the load bank/heater in response to the electrical load power demand increasing at the high rate of change to preemptively shed load to prevent the power demand on the genset from becoming greater than at least one of the selected output power capacity and the genset output power capacity.
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Abstract
An integrated load bank and exhaust heater for a diesel genset exhaust aftertreatment system of the type having a diesel particulate filter (DPF) and a selective catalytic reduction (SCR) section. The load bank/heater can function as a load bank when testing the genset, as a heat source to optimize SCR efficiency, as to thermally regenerate the DPF filter.
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Citations
9 Claims
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1. A method of distributing power from a genset having an output power capacity to an electrical load powered by the genset and to a load bank/heater in an exhaust after treatment (AT) system coupled to the genset, the method including:
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delivering power from the genset to the electrical load; delivering power from the genset to the load bank/heater to heat exhaust from the genset; monitoring power demand on the genset while delivering power to the electrical load and the load bank/heater; determining whether the power demand of the electrical load is increasing at a high rate of change, wherein the high rate of change indicates that the power demand of the electrical load is projected to become greater than at least one of a selected output power capacity and a genset output power capacity; and reducing the amount of power applied to the load bank/heater in response to the electrical load power demand increasing at the high rate of change to preemptively shed load to prevent the power demand on the genset from becoming greater than at least one of the selected output power capacity and the genset output power capacity. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An exhaust after treatment system for use with a genset having an output power capacity coupled to an electrical load, including:
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a load bank/heater configured to be powered by the genset and to heat exhaust from the genset; a power sensor to monitor power demand on the genset; and an electronic controller coupled to the load bank/heater and the power sensor, the electronic controller configured to; control the amount of power applied to the load bank/heater; determine whether the power demand of the electrical load is increasing at a high rate of change, wherein the high rate of change indicates that the power demand is projected to become greater than at least one of a selected output power capacity and a genset output power capacity; and reduce the amount of power applied to the load bank/heater in response to the electrical load power demand increasing at the high rate of change to preemptively shed load to prevent the power demand on the genset from becoming greater than at least one of the selected output power capacity and the genset output power capacity. - View Dependent Claims (8, 9)
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Specification