Methods and systems for characterizing void fractions
AssigneeUniversiteit Gent
InventorsMichel De Paepe, Kathleen De Kerpel, Hugo Caniere
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Abstract
The present invention relates to a method and system for determining the void fraction of a multi-phase system in a channel. The method comprises the steps of measuring a void fraction dependent parameter of the multi-phase system, obtaining a flow regime of the multi-phase system, and determining the void fraction of the multi-phase system taking into account a set of one or more relationships between the void fraction dependent parameter and the void fraction, the set of relationships being specific for the obtained flow regime.
Claims16
A method of designing or controlling a heat transfer system comprising a set of at least two parallel circuits, the method comprising:
- obtaining, for at least one of the circuits of the set of parallel circuits, a void fraction dependent parameter of a substance being a multi-phase system flowing through the at least one circuit, and
- controlling a valve in at least one circuit of the set of parallel circuits
- so as to induce a flow in the at least one circuit that only has an evaporated fraction of the multi-phase system in the circuit at a position where the at least one circuit is combined with other parallel circuits or
- so as to obtain an identical evaporation state in more or each of the parallel circuits or
- so as to obtain a variable evaporation state of more or each of the parallel circuits,
- wherein the controlling of the valve is based on the obtained void fraction dependent parameter or a void fraction based on the void fraction dependent parameter.
A heat transfer system, the system comprising:
- a distributor:
- a plurality of parallel circuits of flow channels;
- and
- a collector,
- wherein the distributor is arranged for distributing an incoming substance flow, the substance being a multi-phase system, over the plurality of parallel circuits and the parallel circuits are combined in the collector for combining an output substance flow of each of the parallel circuits, and
- wherein the heat transfer system further comprises at least one valve for controlling the flow through a flow channel of at least one circuit, the at least one valve being controllable as function of a void fraction of the multi-phase system in the at least one circuit.
Dependencies are inferred from the claim text.