Abstract: An electronic requisition processing method and system are disclosed. The method comprises the steps of preparing an electronic requisition including a requisition proposal; establishing an electronic list of approvers for the requisition; and at defined times, electronically recalculating the list. Preferably, this list is recalculated after each of at least some of the approvers act on the requisition; and the list is recalculated according to a given set of rules. Also, in the preferred system, the approval process is synchronous, whereby upon submission of the requisition, the requisition is immediately available for approval. Additionally, preferably, when each approver approves, the list is dynamically recalculated to take into account the availability of approvers further down in the list.

Abstract: A work extraction arrangement (10) comprises a cooling assembly (12) for cooling a gas to provide a working fluid capable of doing work. The arrangement (10) further includes storage means (14) for storing the working fluid and a turbine assembly (18) for extracting work from the working fluid. A fluid delivery assembly (16) is also provided to deliver the working fluid to the turbine assembly (18).

Abstract: A heat exchanger (10) comprises a first sheet (12), a second sheet (14) and an additional sheet (30). The first and second sheets (12, 14) are wound around an axis (X), each sheet (12, 14) has hot and cold edges at the hot and cold ends (16, 18) respectively of the heat exchanger (10). The hot and cold edges of the first sheet (12) are-joined to the hot and cold edges of the second sheet (14). The end (12A) of the first sheet (12) is joined to the second sheet (30) by an axially extending join (28) at a position spaced from the end (14A) of the second sheet (14). The end (30A) of the additional sheet (30) is joined to the end (14A) of the second sheet (14) by an axially extending join (28). The additional sheet (30) is thicker and wider than the first and second sheets (12, 14) such that at least one of the hot and cold edges (30C, 30D) of the additional sheet (30) extend beyond the hot and cold edges of the first and second sheets (12, 14).

Abstract: A household energy management system uses measurements of the household electricity supply 4 to identify and to determine the energy consumption of individual household appliances. From these measurements, models can be built of the behaviour of the occupants of the house, the thermal properties of the house and the efficiency of the appliances. Using the models, the household appliances—in particular heating and cooling appliances—can be controlled to optimize energy efficiency; and maintenance programmes for the appliances and for the house itself can be recommended to the householder or arranged with a service company.

Abstract: A work extraction arrangement (10) comprises a cooling assembly (12) for cooling a gas to provide a working fluid capable of doing work. The arrangement (10) further includes storage means (14) for storing the working fluid and a turbine assembly (18) for extracting work from the working fluid. A fluid delivery assembly (16) is also provided to deliver the working fluid to the turbine assembly (18).

Abstract: An apparatus for supplying inlet gas 29 and fuel 17 to a gas turbine engine 10, the apparatus comprising: a heat exchanger 28 for transferring thermal energy from the inlet gas 29 to a fuel 17 for the gas turbine engine 10, the heat exchanger 28 comprising a first input for receiving fuel 17, a second input for receiving inlet gas 29, a first output for providing inlet gas 31 after heat exchange to the gas turbine engine 10 and a second output for providing fuel 33 after heat exchange to the gas turbine engine 10.

Abstract: An electronic requisition processing method and system are disclosed. The method comprises the steps of preparing an electronic requisition including a requisition proposal; establishing an electronic list of approvers for the requisition; and at defined times, electronically recalculating the list. Preferably, this list is recalculated after each of at least some of the approvers act on the requisition; and the list is recalculated according to a given set of rules. Also, in the preferred system, the approval process is synchronous, whereby upon submission of the requisition, the requisition is immediately available for approval. Additionally, preferably, when each approver approves, the list is dynamically recalculated to take into account the availability of approvers further down in the list.