Abstract: A starter system for start up of a combined heat and power unit comprising a generator which is connectable to the grid. The starter system comprises a variable frequency drive, VFD, operable to receive power from the grid. The VFD reduces the frequency of the power, and provides the reduced-frequency power to the generator to start the generator. The starter system further comprises a bypass relay configured to bypass the VFD. The bypass relay allows direct connection between the grid and the generator after the generator has started. The variable frequency drive is configured to operate temporarily during start up of the combined heat and power unit.

Abstract: A starter system for start up of a combined heat and power unit comprising a generator which is connectable to the grid. The starter system comprises a variable frequency drive, VFD, operable to receive power from the grid. The VFD reduces the frequency of the power, and provides the reduced-frequency power to the generator to start the generator. The starter system further comprises a bypass relay configured to bypass the VFD. The bypass relay allows direct connection between the grid and the generator after the generator has started. The variable frequency drive is configured to operate temporarily during start up of the combined heat and power unit.

Abstract: An engine-generator comprises: a generator 13, an internal combustion engine 14 coupled to the generator 13 such that operation of the internal combustion engine 14 will generate electricity via the generator 13, and a control system incorporating a misfire detection system 5, the misfire detection system 5 being arranged to monitor engine rotation speed in order to detect a misfire event during operation of the engine 1; wherein in response to an indication of the misfire event the control system initiates a safety mode of the engine-generator.

Abstract: Disclosed is a heat exchanger including a plurality of fins, each having a first aperture and a second aperture. A first aperture of a downstream one of the plurality of fins decreases relative to a first aperture of an upstream one of the plurality of fins. A first fluid from the first aperture of the upstream one of the plurality of fins is received partially in the first aperture of the downstream one of the plurality of fins and the remainder of the first fluid is diverted along the downstream one of the plurality of fins and received in the second aperture of the downstream one of the plurality of fins. An inner jacket contacts each of the plurality of fins. An outer jacket surrounds the inner jacket defining a chamber for containing a second fluid therein. The first aperture and the second aperture each define sectors of a circle extending from a central part to an outer periphery for conducting the first fluid toward the inner jacket.