Anton Paar’s Post

On #Hydrogen #Argon Power Cycle “This can be used as a normal #combustion #engine with closed cycle. N2 is removed and only #O2, #H2 and Ar is feed to the engine. No #aftertreatment required as exhaust is recycled. The #H2O is removed from exhaust stream by #cooling. Ar instead of N2 increases the #thermodynamic #efficiency as well. Can be a very interesting concept for #stationary applications like #gensets. More or less like a #mechanical #fuelcell.” , Ulf Lundqvist “Not ideal for a #gas_turbines because #argon has a low #specific_heat_capacity. The #turbine inlet #temperature will be very high whilst having low #enthalpy H=m*Cp*dT. Very good for a #reciprocating_engine, however, that is not constrained to the same degree for #peak_cycle_temperature. #Spark_ignition is #knock_limited to very low #compression_ratios of around 6, so there are no #efficiency benefits through this route. #Non_premixed #combustion is the only sensible way to go.” David O. “With the extreme #capabilities of #Thermo_Chargers, very high levels of #turbo_compounding are possible, enabling total #expansion_ratios to be over 10X the #compression_ratio, so #efficiency can be very high, even with very low final #compression. We are targeting #turbine inlet capabilities at over 200 psi and 2,000 C, several times that of current #machinery.” David Onstenk ( Image regenerated by #AI )

"Generally, the methods for scavenging vibration energy caused by passing trains can be divided into four categories: electromagnetic harvesters, piezoelectric harvesters, triboelectric harvesters, and hydraulic harvesters." #railwaytechnology #energyharvesting #vibration

The study of vibrations in the context of porous micropolar media thermoelasticity and the absence of energy dissipation Lavinia Codarcea-Munteanu; Marin Marin; Sorin Vlase https://lnkd.in/eaWvYgFT #Micropolar,  #Voids,  #Vibration,  #Thermoelasticity,  #Dissipation, #Computational_Mechanics, #Mechanical_Engineering

Great explanation of an effect that gets more and more important with longer blades: #torsional-loads! #blademonitoring #bladehealth

In our research on Ocean Wave Energy Harvesting, we present a new ocean wave energy harvester that operates based on the small pitch motion of moving floaters. Unlike most existing systems, our harvester can function on moving ships and boats, such as emergency boats. We designed a vibro-impact system to capture the kinetic energy from small pitch motions and transfer it to the vibratory component via impulsive loads. A mechanical rectifier, driven by the oscillations of the vibratory part, provides continuous rotations required by the electromagnetic transducer. Our findings show that the gap size in the impact part of the system and the ocean wave period significantly influence the output of electrical energy. The application of this system is tested in the Towing Tank Laboratory. More details: https://lnkd.in/gwGRVTds #renewable_energy; #ocean_wave_energy

In continuation of our research on Ocean Wave Energy Harvesters (OWEH), we proposed and examined a novel energy harvesting system that, unlike conventional ocean wave energy harvesters, is not anchored to the seabed and can utilize both the roll and pitch motions of ocean waves. This system comprises an inverted pendulum and a mechanical rectifier. We investigated the effect of changing the floater geometry on the oscillatory behavior of the system under both harmonic and random excitation. To achieve this, we employed the strip theory method to determine the dynamic parameters of various floaters. Our findings demonstrate that optimizing the non-dimensional mass of the energy harvester can result in a system that generates comparable power levels under both random and harmonic excitations. This innovative system has the potential to generate substantial amounts of energy. For more details: https://lnkd.in/gBHXTwzU #Renewable_Energy, #Ocean_Wave_Energy

#mdpienergies #highlycitedpaper Thermal Energy and Luminosity Characterization of an Advanced Ignition System Using a Non-Intrusive Methodology in an Optically Accessible Calorimeter 👉 https://brnw.ch/21wLVlU #ignition #calorimetry #internalcombustionengine #luminosity

Really a neat gen set. Air bearing and only 2.5PPM of Nox in exhaust gases is fantastic. It qualifies for tax breaks due to clean exhaust compared to other engines and turbines. It comes in a 230kw unit standard at present but they will grow to a 250Kw unit and then on to Megawatt size units in their natural progression. They have been in the field working 24/7 for 3 years now and have collected loads of reliability and Ops cost data. The units are 45% fuel efficient which is good. They can burn just about any combustible gas like Natural gas, biogas, hydrogen, ammonia, etc and can use blends of these and can be adapted on the fly to switch between fuels. The unit itself produces power at about 5.5 khz and that is rectified to DC and then inverted to three phase 480VAC power all that is done on skid and comes fully packaged that way. In general a very good choice for high reliability, high efficiency power generation. Its more expensive than traditional reciprocating backup power so from an investment point of view it would fit best in continuous or high usage applications.

I recommend that new paper THE MODELLING OF TRACTION ENERGY CONSUMPTION OF A CONTAINER TRAIN