Description The vapour generator (or boiler) consists of a coiled copper tubethrough which pressurised SES36 solvent flows. The coil is immersed inan insulated tank containing hot water provided by either an electricresistance heater which is housed within the tank, or by the optionalsolar energy collector mounted in a suitable position outside. Thevapour produced then flows through a convergent- divergent nozzle andimpinges on the bladesof a single stage impulse turbine. The turbine ismounted on the condenser and the exhaust vapour from it passesdirectly over the water cooled coil. The condenser, which has a highstrength glass shell, is partly flooded to provide the SES36 solvent witha few degrees of sub-cooling. The SES36 solvent is chosen for its lowpressure-temperature characteristics allowing safe operation in glass.An internal fixed speed positive displacement pump draws condensedsolvent from the bottom of the condenser and delivers it, via a controlvalve and flow meter, to the vapour generator for re-evaporation. Asmall quantity of lubricating oil mixed with the SES36 solvent and isseparated from thehigh pressure vapour line and fed to the turbinebearings. Maximum power is obtained atabout 15,000 rev.min-1. Asimple band brake dynamometer applies and measures the resistingtorque to the turbine shaft. An optical sensor senses the rotationalspeed of the turbine and this is displayed on a digital meter. Features Safe and Suitable For Unsupervised Student Operation. Optional (Renewable Energy) Solar Option Available. Responds Rapidly to Control Changes. Negligible Operating and Maintenance Costs. Technical Specification Vapour Generator: Copper generating coil in water filled stainlesssteel tank fitted with thermostatically controlled *1.5kW heater. Turbine: Single stage impulse turbine typical output approximately*20W at 15,000 rev. min-1. Condenser: Water cooled coil housed in glass walled cylindricalchamber. Feed Pump: Positive displacement pump. Circulating Pump: To circulate water through vapour generator tankand solar panels (if fitted). Noise level (*Typical values. Results will vary from individualmachines due to local voltage and operating conditions): 1m distance approx. with the unit running at circa 25000rpm: Front of unit = 79.8dB to 86.6dB Rear of unit = 79.5dB to 86.0dB Left side = 76dB to 87.0dB Right side = 76.5dB to 87.5dB Instruments: 15 point digital temperature indicator with spare stations for solarsystem if fitted Two pressure gauges ranges 0 to 800kN m-2 and -100 to +100kNm-2 respectively SES36 solvent flowmeter 1 to 10 g s-1 Water flowmeter 4 to 50 g s-1 Digital Tachometer with optical sensor 0 to 99999 rev.min-1. Band brake dynamometer for 0-5N net force at pulley. Weights & Dimensions Weight: 67 kg Length: 1060mm Width: 430mm Height: 925mm
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