Partitioning

Splitting of the exhaust stream and the following dilution process may be done by different dilution system types.

The exhaust split and the flow into DT is controlled by the flow controller FC2 that adjusts the flows (or speeds) of the pressure blower PB and the suction blower SB, accordingly.

Partitioning does usually not imply involving additional units in the transactions.

Thus, the exhaust split is determined by the total number of tubes.

The tubes must have the same dimensions (same diameter, length, bend radius), so that the exhaust split depends on the total number of tubes.

The dilution air flow is controlled by the flow controller FC2, which may use GEXHW, GAIRW, or GFUEL as command signals, for the desired exhaust split.

Two pressure control valves are necessary for the twin venturi/twin orifice system for proportional flow splitting by controlling the backpressure of EP and the pressure in DT.

Consequently, the exhaust split for a given tunnel flow rate is not constant, and the dilution ratio at low load is slightly lower than at high load.

For a multi tube system (Figure 17), a flow controller is necessary for proportional exhaust splitting to maintain a differential pressure of zero between the exit of the multi tube unit and the exit of TT.

major ordinary share transactions and potential ordinary share transactions after the balance sheet date (IAS 33, earnings per share, encourages an enterprise to disclose a description of such transactions, other than capitalisation issues and share splits);