Betekenis van:
gas pump

Werkwoord

Voorbeeldzinnen

1. Gas heat pump
2. for diesel engines at injection pump inlet, for gas fuelled engines at pressure regulator final stage
3. average temperature of the diluted exhaust gas at pump inlet over the cycle, K
4. for diesel engines at injection pump inlet, for gas fuelled engines at pressure regulator final stage.
5. Equivalent fixed gas fire extinguishing systems components (extinguishing medium, head valves and nozzles) for machinery spaces and cargo pump rooms
6. A sampling pump downstream of the measuring chamber may be used to transfer the sample gas through the measuring chamber.
7. At the completion of the hot start cycle, the measurement of the exhaust gas mass flow rate, the diluted exhaust gas volume, the gas flow into the collecting bags and the particulate sample pump shall be stopped.
8. In Hungary, as there is no pump storage plant, natural gas fired plants have the most appropriate technical characteristics to provide these services.
9. The positive displacement pump (PDP), producing a constant-volume flow of the air/exhaust-gas mixture; the flow capacity of the pump shall be large enough to eliminate water condensation in the system under all operating conditions which may occur during a test; this can be generally ensured by using a positive displacement pump with a flow capacity:
10. At the completion of the test, the measurement of the diluted exhaust gas volume, the gas flow into the collecting bags and the particulate sample pump must be stopped.
11. The diluted exhaust gas flow rate is measured either with a positive displacement pump PDP or with a critical flow venturi CFV or with a sub-sonic venturi SSV.
12. A sample of the diluted exhaust gas is taken from the dilution tunnel DT of a partial flow or full flow dilution system through the particulate sampling probe PSP and the particulate transfer tube PTT by means of the sampling pump P. The sample is passed through the filter holders(s) FH that contain the particulate sampling filters.
13. A heat exchanger (H) of a capacity sufficient to ensure that throughout the test the temperature of the air/exhaust-gas mixture measured at a point immediately upstream of the positive displacement pump is within 6 K of the designed operating temperature. This device shall not affect the pollutant concentrations of diluted gases taken off after for analysis;
14. A sample of the diluted exhaust gas is taken from the dilution tunnel DT of a partial flow or full flow dilution system through the particulate sampling probe PSP and the particulate transfer tube PTT by means of the sampling pump P. The sample is passed through the filter holder(s) FH that contain the particulate sampling filters.
15. The total diluted exhaust gas flow over the cycle MTOTW (kg/test) shall be calculated from the measurement values over the cycle and the corresponding calibration data of the flow measurement device (V0 for PDP, KV for CFV, Cd for SSV): the corresponding methods described in section 2.2.1. may be used. If the total sample mass of particulates (MSAM) and gaseous pollutants exceeds 0,5 % of the total CVS flow (MTOTW), the CVS flow shall be corrected for MSAMor the particulate sample flow shall be returned to the CVS prior to the flow measuring device. 2.2.1. Determination of the diluted exhaust gas flow PDP-CVS system The calculation of the mass flow over the cycle, if the temperature of the diluted exhaust is kept within ± 6 K over the cycle by using a heat exchanger, is as follows: MTOTW = 1,293 x V0 x NP x (pB - p1) x273/(101,3 x T) where MTOTW mass of the diluted exhaust gas on wet basis over the cycle V 0 volume of gas pumped per revolution under test conditions (m3/rev) N P total revolutions of pump per test p B atmospheric pressure in the test cell (kPa) p 1 pressure drop below atmospheric at the pump inlet (kPa) T average temperature of the diluted exhaust gas at pump inlet over thecycle (K) If a system with flow compensation is used (i.e. without heat exchanger), the instantaneous mass emissions shall be calculated and integrated over the cycle. In this case, the instantaneous mass of the diluted exhaust gas shall be calculated as follows: MTOTW,i = 1,293 x V0 x NP, i x (pB - p1) x 273/(101,3 x T) where N P, i total revolutions of pump per time interval CFV-CVS system The calculation of the mass flow over the cycle, if the temperature of the diluted exhaust gas is kept within ± 11 K over the cycle by using a heat exchanger, is as follows: