Method of controlling power plant fuel consumption

FIELD: instrumentation.

SUBSTANCE: proposed method consists in breaking down power output in operation at load and idling into intervals defined experimentally. Then, fuel output at each interval of power output is calculated by appropriate formula. Obtained fuel consumption is compared to actual magnitude. This allows comparing actual consumption with design consumption without breakdown into power output and idling. Design total fuel consumption results from adding design fuel consumption and that in idling at preset time interval.

EFFECT: higher accuracy of determination.

1 dwg

 

The invention relates to the field of flow measurement of liquids, in particular measuring the fuel consumption of diesel generator sets rolling stock of railway transport, but can also be used on other modes of transport.

There is a method of monitoring fuel consumption, implemented in the prototype, in which actual consumption is laid on the consumption under load and consumption at idle power settings for subsequent comparison with the estimated consumption in traction and consumption at idle (see patent RU No. 79997 U1, CL G01F 23/18, publ. 20.01.2009).

The disadvantages of this method are that it does not account for transients in the operation of the power plant with frequently changing loading conditions for a sufficiently short time intervals that exceed the capability of measuring systems for accurate measurement of fuel consumption.

The objective of the proposed method is to increase the measurement accuracy of the fuel consumption.

The problem is solved in that a method of controlling fuel power plant, consisting in the fact that the total estimated consumption compare with the actual mode of operation under load and idling, which is determined by measuring the operating parameters of the installation differs according to the image is the shadow first break characteristic of the realizable capacity of the power unit during operation under load and idling at intervals, determined experimentally, then calculate the flow rate at each interval realizable capacity according to the formula, and then compared with the actual consumption.

This gives the possibility to compare actual consumption with the calculated for a period of time without decomposition for traction and idling. The estimated total consumption is obtained by adding the estimated costs under load and costs at idle for a specified time interval.

Proposed method of control the fuel consumption of the power plant of the vehicle is illustrated the block diagram of Fig. 1.

The diagram shows a fuel tank 1 fuel system power unit of the vehicle, the internal combustion engine (ice) 2, the main generator 3, the primary converters 4 (sensors operating parameters of the power installation and location coordinates of the vehicle), the on-Board recorder 5, the computer-readable storage media 6 and 7 (internal and external), the unit of data transmission on the radio channel 8, the stationary system receiving data from channel 10 (with access to the Internet or intranet), block data transfer via GPRS 9, a fixed system is receiving data via GPRS 11 (with access to the Internet or intranet), stationary system data 12 (for example, the local workstation with access to the Internet or intranet), the stationary system of education is ODI data 14 (such as a server), the unit of the coordinate input area 15, the unit is input unit and time costs of the power unit 16 and the decision block 17.

The block diagram is not the only possible option scheme hardware implementation of the proposed method and serves only as an example to explain the sequence of actions (operations) over material objects - electric information signals generated by the primary converters 4 physical quantities and the functional blocks of this scheme.

The proposed method is as follows.

During operation of the power plant of the vehicle by means of transducers 4 (sensors) provide measurements of the level and temperature of the fuel, for example, with fuel level sensors that are installed directly in the fuel tank 1, the electrical energy developed the main generator 3 thrust (for example, a sensor for measuring current and voltage), the operating time of the power unit in the modes under load, idle and shutdown state (for example, using a timer), and record the coordinates of the location on the terrain vehicle (e.g., GPS or GLONASS), and then in the on-Board the Registrar 5 received data is written to the internal machine-readable medium is information 6 and the removable external storage device 7, or transfer them to block transmission of information via radio 8, which receives information on a stationary system for receiving data from channel 10 or block transmission of information via GPRS 9 with GPRS receives information on a stationary system for receiving data 11, then the data is transmitted to the stationary system data 12 (for example, local working place)connected to the network 13 (e.g., Internet, intranet), through which the data fall on a stationary data processing system 14 (e.g., the server).

In the stationary system 14 data are grouped by the given coordinate location. The coordinates for the group comes from a unit of the coordinate input area 15. For each coordinate location data are processed measurement transducers, which is the basis for fuel consumption, Mcalcin the fuel tank in the modes of operation of the power plant and consists of a design flow in the thrust and estimated flow at idle

Mcalc=Mrectal+MRasch

where Mcalc- the total estimated fuel consumption for the period, kg;

Mrectal- estimated fuel-powered for the period, kg;

MRasch- estimated fuel consumption at idle for the period, kg

Given the specific costs in traction on the i-th interval realizable capacity and hourly fuel consumption at idle is the go power plant, coming from a block of input specific and time costs of the power unit 16, is determined by the estimated fuel consumption, thrust and estimated fuel consumption at idle:

where Mrectal- estimated flow in traction on the i-th interval of the realizable capacity of the power unit, kg;

Mrectal=Qtag·Atag,

where Qtag- specific consumption in traction on the i-th interval of the realizable capacity of the power unit, kg/kW·h;

Andtag- work done on the i-th interval of the realizable capacity of the power unit, kWh

where Qh- time fuel consumption idle power plant, kg/h;

Txxjthe time of operation of the power plant at idle, h;

j=1, 2, 3...k - intervals of operation of the power plant at idle.

Overspending or fuel economy is determined by comparing the actual flow from the settlement in decision block 17

Δ=Mfact-Mcalc

where Δ is the economy or fuel consumption, kg;

Mfactactual fuel consumption, certain data processing of measurement transducers of the power plant, kg

Industrial applicability is provided by modern technology.

The method of controlling fuel flow power installation is key, consisting in the fact that the total estimated consumption compare with the actual mode of operation under load and idling, which is determined by measuring the parameters, wherein the first break characteristic of the realizable capacity of the power unit during operation under load and idling at intervals to be determined experimentally, then calculate the flow rate at each interval of the sold power by the formula:

where Mrectal- estimated flow in traction at the i-th interval realizable capacity of the power unit, kg,
Mrectal=Qtag·Atag,
where Qtag- specific consumption in traction at the i-th interval realizable capacity of the power unit, kg/kW·h;
and then sum all the estimated expenditure under load and at idle.



 

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5 dwg

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9 cl, 9 dwg

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