Stirling engine with rhombic drive 75ccm 50Watts measured by Arduino скачать в хорошем качестве

Stirling engine with rhombic drive 75ccm 50Watts measured by Arduino

Arduino analog devices: 1. Cooler temperature Tc measured with AD22100 2. Pressure sensor MPX5999D 3. Generator voltage output measured with a voltage divider 4. Generator current output measured with ACS712 5+6. I2C bus for LCD, RTC and SD-card for logging data Arduino digital devices: 1. Hall sensor to measure speed with an interrupt 2. Heater temperature Te measured with thermocouple and MAX6675 (the position of the thermocouple is not close enough to the heater head so the measured temperature is to low, will be fixed!) The resistance of the electric load (lamps) was choosen to match a good efficiency of the generator and that they don´t dazzle. For every speed the efficiency for the specific load of the generator was measured with a prony brake to calculate mechanical power of the engine. Output power is limited by heat exchangers, mostly by external heater surface area. New heat exchangers are in the planning stage using FastTrack, FlexiScale and ReScale by Dr. A. Organ for a target power of several hundred Watts. If anybody is familar with the scaling methods of Dr. A. Organ I would be very thankful if u contact me here or via e-mail : [email protected]. I have two questions to the gas path design: 1. What heat exchanger dead space ratio is acceptable for such a relative low-power engine? My engine now has a dead space ratio delta=0,48 Scaled by the GPU3 as the prototype it would be delta=1,2 Scaled by the MP1002CA as the prototype it would be delta=0,51 2. Is there a way to change flow passage length Lx to fit for my design ? Flow passage length of expansion heat exchanger scaled by GPU3 is Lxe=155 mm which is to long for my purpose (I use slots which surround the heater head) 90 mm would be the maximum I can use. Scaled by the MP1002CA Lxe=37 mm which is to short and results in far to less external heater surface. I would be very grateful if someone could mention something helpful to these problems. I am always happy for comments and suggestions! Thanks for watching!