Frequently Asked Questions
Q: How much does the Clean Cycle generator cost?
A: Depending on our scope of supply (heat delivery, condensing system, etc), the price of a Clean Cycle solution will vary. Please contact us to get a specific cost estimate.
Q: What heat sources can the Clean Cycle run on?
A: The Clean Cycle is heat source agnostic. Engines are our most common heat source. We are able to take heat from engines running natural gas, biogas, syngas, propane, diesel, HFO, or just about any other fuel. With dirtier fuels, like HFO and diesel, additional equipment and maintenance are required to clean the heat transfer surfaces. Outside of engines, we can use low pressure steam (4.5 bar or greater), pressurized hot water, flue gas from ovens, or any other hot stream. Check out our Applications page for more information.
Q: Is my site a good application for the Clean Cycle?
A: To run at full power, the Clean Cycle needs a stream with approximately 1,000 kWth of heat at a temperature of 155C for liquids or 200C for gases. This can often be found in reciprocating engines >1.4MW, turbines >1.2MW, and boilers >1MW of capacity. Please contact us for a more specific heat analysis and visit our How a Site Comes Together page
Q: What is the pressure of the Clean Cycle unit?
A: The Clean Cycle operates at a max pressure of 24.5 bar.
Q: What is the lead time to ship a Clean Cycle unit?
A: This will depend on the scope of supply, but a standard unit can be ready to ship in as little as 16 weeks after receipt of PO.
Q: How many Clean Cycle units are in the field?
A: We have shipped more than 100 units and the fleet continues to grow.
Q: How many operating hours do Clean Cycle units have?
A: The installed base of Clean Cycle generators has accumulated greater than 1 million operating hours. It's worth noting that the same core components used in the Clean Cycle have also been used in other technologies as well with over ten years of successful performance.
Q: Can the Clean Cycle withstand harsh environments?
A: We have designed the Clean Cycle to operate in a wide range of environments from freezing conditions to remote islands. For salt air conditions, we apply a protective coating and install a salt filter. Additionally, our condenser fins are coated with an anti-corrosion epoxy and most of the nuts and bolts are switched to galvanized or stainless. For cold environments, we have a container heater option and add additives to the water loops to prevent freezing.
Q: Can the Clean Cycle operate on "island mode" or as a prime mover for a grid?
A: The Clean Cycle is designed to follow a heat source, not be a prime mover for a grid. The power electronics also require a strong signal from the grid to create the appropriate frequency.
Q: What personnel are needed to run the Clean Cycle?
A: None during normal operation. If something goes wrong, the Clean Cycle will shut down and revert to a fail-safe configuration. Often we can remotely diagnose issues and get the system back up and running.
Q: How much maintenance is required?
A: Regular maintenance will enhance the life of any machine and the Clean Cycle is no different. Unlike most generators, the Clean Cycle does not have any oil or lubricants to replace. The primary regular maintenance is replacing filters. Less frequently, pump seals will be replaced and heat exchangers may need to be cleaned.