Outline specification (provisional at 13 December 2005)

GENERAL

Working fluid                        Air or N2

Target RPM                            2500

Nom charge press p_ref           15 bar

Swept volume V_sw                        100 cm³

Target shaft power                    1 kW

Configuration                            single-cylinder, coaxial, inverted (combustion chamber below)

HEATING PROVISION

Fuel                                            gas (butane/propane)

Configuration                            machinable ceramic (Organ and Larque 2004)

Exhaust/air pre-heater                  Spirex  (Organ 2005e)

Air admission temp ex pre-heater        >450^oC

Target exhaust outlet temp             < 100^oC (to achieve utilization of HCV of fuel)

Flame holder                                Dunlop 'Retimet' metal foam

REGENERATOR

Material                                        Rectangular weave wire screen

Aperture ratio  a                           > 0.8 (calls for weaving to special order)

Wire diameter   d_w                         ~0.02mm to give suitable hyd. rad. r_h at high aperture ratio a 

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