초록 ▼

A parametric emissions monitoring system for monitoring stationary engine/compressor units coupled to a pipeline provides, in a reciprocating embodiment, reliable and accurate determinations of emission levels for NOx, CO, and total hydrocarbons (THC) from an emissions matrix primarily as a function

A parametric emissions monitoring system for monitoring stationary engine/compressor units coupled to a pipeline provides, in a reciprocating embodiment, reliable and accurate determinations of emission levels for NOx, CO, and total hydrocarbons (THC) from an emissions matrix primarily as a function of engine speed and engine torque. Validation of the determined emissions level is provided by comparing the values of a set of actual engine operating parameters with a respective value in a set of calculated engine operating parameters to determine whether the deviation of the actual operating parameter from the expected operating parameter is within a defined range, and thus whether the engine is operating within a defined control envelope. Each set of engine operating parameters includes spark ignition timing, fuel rate, and air manifold pressure. When the comparison indicates that the actual engine operating parameters diverge from the respective expected engine operating parameter, the emissions are determined from the emissions matrix, and are subjected to a bias factor being assessed against the NOx, CO and THC emissions level, the bias factor depending on the severity of the deviation. Moreover, these biased emission levels are further biased relatively up or down depending on selected ambient operating conditions, including relative humidity, power cylinder exhaust temperature deviation, and air manifold temperature.

대표청구항 ▼

In an energy conversion system for converting hydrocarbon based fuel into thermal energy to be used in a process wherein the system has associated therewith an emissions matrix, a method of determining parameter values indicative of exhaust emissions produced by the combustion of the fuel by the ene

In an energy conversion system for converting hydrocarbon based fuel into thermal energy to be used in a process wherein the system has associated therewith an emissions matrix, a method of determining parameter values indicative of exhaust emissions produced by the combustion of the fuel by the energy conversion system, said method comprising the steps of: (a) measuring a respective value for each parameter of a set of process and system parameters; (b) determining a respective value for each parameter of a set of actual operating parameters using the process and system parameter values measured in step (a); (c) calculating a respective value for each parameter of a set of expected operating parameters using the process and system parameter values measured in step (a) and predetermined tuned system operating data; (d) comparing each one of the actual operating parameter values with a respective one of the expected operating parameter values generated in step (c) to determine a respective operating parameter deviation; (e) determining a respective value for each parameter of a set of emission parameters indicative of exhaust emissions produced by the system as a function of the process and system parameter values, the emissions matrix, and the operating parameter deviations; and (f) biasing the emission parameter values from the emissions matrix using a set of emission biasing parameters to determine updated values of the emission parameters.