- Welcometo Cool Energy
- Applicationsstirling engine uses
- Waste Heat Recoveryconvert waste to electricity
- Company Snapshotwhat we are about
Welcome to Cool Energy
Making Clean Power with Clean Air
Cool Energy is pleased to introduce our novel low-temperature SolarHeart® Engine for heat recovery applications. The SolarHeart® Engine is an energy efficiency solution that converts operational lower temperature (100°C to 300°C) waste heat into electricity, providing quick payback time and clean electricity. The SolarHeart® Engine captures waste heat that an industrial site, commercial process or power generator is already emitting, and turns it into clean and renewable electricity, recycled thermal energy, or mechanical energy. These engines are a new approach to the design of the well-known Stirling cycle, employing a breakthrough engine configuration, low-cost materials, self-lubricating components, a nitrogen working gas, and very long service intervals. This combination of engineering elements has enabled a very low-cost, modular heat-recovery system that can be customized to any customer heat recovery need in which hot liquids or gases up to 700C can be used to generate on-site electricity. Harnessing heat from this lower and previously untapped temperature range opens an entire new set of renewable and alternative applications for economical power generation. Using Cool Energy’s SolarHeart® Engine improves overall energy and operational efficiency.
The initial market application for the SolarHeart® Engine, due to its potentially rapid payback time, is the recovery of wasted and exhaust heat to produce electricity. These Waste Heat Recovery settings including commercial and industrial facilities, remote and military generators, biomass, solar thermal, and geothermal can all benefit from using the SolarHeart® Engine for electricity production. Due to the low cost of the engine and the “free” fuel input, the waste heat recovery scenarios of the SolarHeart® Engine offer payback times as low as one year.
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The SolarHeart® Engine can be used to recover low grade waste heat that has previously been uneconomical to recover, from any hot gas up to 700C, the heat flow can be used to drive a heat transfer fluid temperature to 100C to 300C.
Waste heat sources include:
- Commercial and industrial processes
- Diesel Generators (remote and military uses)
- Pollution control equipment
- Biomass processing
- Solar Thermal
- Ship propulsion engines and shipboard generators
Chances are if an industry needs to heat, bake, cure, melt, dry, roast, or form something in their process, they also have a waste heat stream that can be captured. Cool Energy’s approach boosts operational efficiency and reduces fuel consumption.read more
Waste Heat Recovery
Waste Heat Recovery
Waste heat is created as a by-product of industrial processes. Anywhere there is an industrial process that involves transforming raw materials into useful products – steel mills, paper plants, refineries, chemical plants, oil and gas pipelines, pollution control equipment, and general manufacturing — heat is wasted as a result. If not captured and used to generate emission-free renewable-equivalent power, waste heat is released to the atmosphere through stacks, vents, flares and mechanical equipment. Waste Heat Recovery is the process of collecting waste heat and using it to fill a desired purpose elsewhere. The recovery of industrial waste heat for power has largely been untapped. It is Cool Energy’s novel technology that captures and converts lower temperature (100°-300°C) waste heat to generate emission-free electricity, allowing the industrial user to put their wasted energy back into the process that created it. Installing the SolarHeart® Engine(s) on waste heat streams from industrial processes will have payback times as short as one year.
According to the United States Department of Energy, up to 50 percent of the energy from all fuels burned in the U.S. ends up in the atmosphere as waste heat. Research indicates that recovery of the energy waste from industrial facilities could fulfill up to 20 percent of total domestic electricity demand and simultaneously effect a 20 percent reduction in greenhouse gas emissions. It is estimated that 11GW of power could be generated in the US alone if the best quality waste heat from commercial and industrial operations were collected and converted to electricity. (link to Public Benefit slide)
One application being targeted for initial product deployment is waste heat recovery from the exhaust of diesel gensets (DGs) and shipboard generators. The exhaust gas from these generators are typically 450°C to 600°C, which supports 250°C to 300°C fluid delivery temperatures to the SolarHeart® Engine. With an easy retrofit, Cool Energy’s enginecan boost the output of DGs by 10% to 20% when recovering the waste heat the generator exhausts. Once the SolarHeart® Engine is producing electricity using the exhaust gas from the DG, there are two basic options available for how to use the electrical energy: load reduction and battery charging.
In remote and military settings where fully burdened diesel fuel can cost up to $15/gal including transport costs, the payback period for the engine can be less than one year. The reduced requirement for transport of fuel is a highly valuable benefit to the military, as the majority of present war casualties occur during resupply missions of water and fuel. (link to Diesel WHR doc)
Pollution control equipment is used to destroy particulates and volatile organic compounds (VOC’s) that are produced by industrial processes such as coffee roasting, metal coating and painting, and cement manufacturing. The contaminated gases are usually hot and rising up a ventilation stack, and are passed through a combustion or oxidation chamber in which the particulates and VOC’s are burned in order to destroy them, preventing them from being released into the air. The gas that is emitted from the combustion chamber has a temperature that ranges from 300C to 600C. This clean, hot gas is passed through a heat exchanger which transfers thermal energy to a circulating heat transfer oil. The oil circulates into Cool Energy’s SolarHeart® Engine, producing electricity from the Stirling cycle machine. This electricity is delivered to the plant power system through a grid-tie inverter, serving local loads and reducing the customer’s electricity bill. For plants operating on a 24/7 schedule in Europe or Japan, the payback times are as short as two years.Pollution control machines of this type are used across many different processes, including food processing, baking, brewing, metal finishing, paint spraying, soil remediation, and petroleum processing. (Link to Pollution Control doc)
Cool Energy Snapshot
We provide innovative equipment that turns wasted heat into clean electricity
• Simple system for electricity generation
• Short Payback time: 1-5 years
• Reliable 20,000 hour service interval, 150,000 hour life, and counting
• Solution is operational – 4th platform in ongoing 24/7 testing
• Demonstrated efficiency of over 22% heat to power conversion
• No waste or byproduct from engine operation
• Breakthrough engine design with low-cost advanced materials
• Strong Intellectual Property position (7 patents issued, 3 pending)
• Market launch through licensing to existing channel partners
• 7 years of product development success
• Targeting the vast untapped waste heat recovery market