Systems, methods and apparatuses for wet stack residue mitigation

Patent metadata

Field	Value
Publication number	US-10920703-B1
Application number	US-201916600623-A
Country	US
Kind code	B1
Filing date	Oct 14, 2019
Priority date	Oct 14, 2019
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

An intelligent electronic device (IED) may monitor wet stack residue buildup of a diesel engine. Once the wet stack residue accumulates to a certain amount, the IED may perform a mitigation procedure. Additionally, tracking wet stack residue buildup may allow an IED to attempt to prevent or reduce accumulation of the wet stack residue. The IED may track an operating power level of the diesel engine to estimate the rate of residue buildup.

First claim

The invention claimed is:

1. A device to monitor wet stack residue accumulation, the device comprising:
a power sensor to detect output power of a diesel engine; and
a processor in communication with the power sensor, the processor to:
track the output power of the diesel engine as detected by the power sensor to develop an output power history;
track an amount of time that the diesel engine operates with the output power below a power level setpoint;
determine that residue accumulated in the diesel engine has reached a residue threshold by determining the diesel engine has operated at below the power level setpoint for an accumulated duration that would cause the accumulation to exceed a target threshold; and
provide an alert to begin a wet stack mitigation procedure.

2. The device of claim 1 , wherein the processor is further to estimate an accumulation rate of the residue by integrating the output power history below the power level setpoint, wherein the accumulation rate resulting from integrating the output power varies based on changes to the output power during time periods below the power level setpoint, and
wherein to determine the residue accumulated, the processor is to apply the accumulation rate across the accumulation duration.

3. The device of claim 1 , wherein the processor is further to estimate a burn-off rate of the residue by integrating the output power history above a high power level setpoint.

4. The device of claim 1 , further comprising a mitigation controller, wherein the mitigation controller receives the alert and initializes a mitigation procedure that alters a load associated with the diesel engine to increase an output power level of the diesel engine.

5. The device of claim 1 , wherein the processor is further to track one or more of coolant temperature, exhaust temperature, and exhaust content, and wherein determining that the residue threshold has been reached is based on one or more of the coolant temperature, the exhaust temperature, and the exhaust content.

6. The device of claim 1 , wherein the residue threshold is a predefined value or curve.

7. The device of claim 1 , wherein the residue threshold is a threshold value based on one or more of environmental factors, fuel type, and fuel quality.

8. The device of claim 1 , wherein the processor is further to characterize a level of residue buildup based on a needed mitigation procedure, wherein the needed mitigation procedure is one of:
operating the diesel engine at a high power level;
overhauling the diesel engine; and
operating the diesel engine at a moderate power level.

9. The device of claim 1 , wherein the processor is further to track an amount of time that the diesel engine operates with the output power above a burn-off power level setpoint,
wherein to determine that the residue threshold has been reached, the processor is further to reduce the accumulated duration based on the amount of time that the diesel engine operates with the output power above a burn-off power level setpoint.

Assignees

• Schweitzer Engineering Lab Inc

Inventors

• Blood Ellery A
• Manson Scott M

Classifications

• F02D29/06 Primary

  peculiar to engines driving electric generators · CPC title

• Y02T10/40

  Engine management systems · CPC title

• F01N2900/1411

  Exhaust gas flow rate, e.g. mass flow rate or volumetric flow rate · CPC title

• F01N2900/08

  said parameters being related to the engine · CPC title

• F01N2900/0422

  measuring the elapsed time · CPC title