Cool Energy
- Company typePrivate
- Founded2006
- HeadquartersBoulder, United States
- Headcount1–10
- GTM typeB2B
- OfferingServices
Cool Energy firmographics
Firmographics- Name
- Cool Energy
- Legal name
- Cool Energy, Inc.
- Website
- https://coolenergy.com
- Company type
- Private
- Founded year
- 2006
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Ownership category
- akta.pro rank
Cool Energy industry classification
Industry- Product category
- Stirling Engine Technology
- NAICS
- Turbine and Turbine Generator Set Units Manufacturing (333611)
- SIC
- Engines & Turbines (3510)
- akta.pro primary industry
- Energy Recovery & Power Island Systems (Boilers, turbines, generators, condensers) (EUAAAKAL)
Keywords
Where Cool Energy is headquartered
LocationHeadquarters
- HQ city
- Boulder
- HQ country
- United States
- HQ region
- North America
Markets served
Cool Energy business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Technology or R&D, Operations, Marketing or Sales
Revenue model
- Consulting Services: Stirling cycle consulting services provided to clients for energy management and power generation projects. Revenue from professional consulting engagements.
- Design Licensing: Licensing arrangements for specific applications of Stirling cycle designs. The company offers design licensing for Stirling cycle machines to be used in energy management and power generation projects. Since entering a fabrication-free model in 2020, the company has pursued licensing with dozens of clients and collaborators.
- Collaborative Design and Deployment Projects: Joint design and deployment projects with partners for Stirling cycle machine applications in industrial, solar, and geothermal energy sectors.
Go-to-market motion1 record
Distribution channels1 record
Cool Energy product offering
Product offeringCore offering
Cool Energy develops Stirling-cycle power-conversion technology, headlined by the ThermoHeart® 25 kW Engine, a single-acting alpha Stirling-cycle machine that converts medium-temperature (100–400°C) thermal energy from industrial waste heat, solar, and geothermal sources into electricity at nearly 30% conversion efficiency. Since 2020 the company has operated a fabrication-free model, monetizing the technology through design licensing for specific applications, Stirling cycle consulting services, and collaborative design and deployment projects with international partners.
Product overview
Cool Energy offers Stirling engine-based products for converting medium-temperature (100-400°C) thermal energy from industrial processes, solar, and geothermal sources into electricity. The core product is the ThermoHeart 25 kW Engine, a Stirling engine achieving nearly 30% conversion efficiency that can be scaled through parallel/series manifold configurations. The company also provides Stirling heat pumping capabilities with high COP. Following a pivot to a fabrication-free model in 2020, Cool Energy now offers Stirling cycle consulting services and design licensing for specific applications, along with collaborative design and deployment projects.
Differentiator
Problem solved
Functional benefit
Brands
- ThermoHeart Engine: 25 kW Stirling engine based on single-acting alpha Stirling cycle architecture, achieving nearly 30% conversion efficiency. Features gradient-descent performance optimization, self-lubricating seals, and high-surface-area heat exchangers. Designed to be quiet, low-maintenance with 20,000 hour service interval.
Products and services
- ThermoHeart 25 kW Engine A 25 kW Stirling engine based on a single-acting alpha Stirling cycle architecture that converts medium-temperature (100–400°C) thermal energy from industrial processes, solar, and geothermal sources into electricity at nearly 30% conversion efficiency, designed for quiet, low-maintenance operation with a 20,000-hour service interval and scalable via parallel/series module configurations.
- Stirling Cycle Consulting Services Expert consulting on the design and application of Stirling cycle machines for energy management and power generation projects, offered to clients evaluating or deploying thermal-to-electric conversion technology.
- Design Licensing for Stirling Cycle Machines Licensing of Cool Energy's proprietary Stirling cycle machine designs for use in clients' energy management and power generation projects, enabling partners to manufacture or deploy the technology without Cool Energy fabricating units.
Quantifiable outcome
- Output power range from 50W to 25,000W across five generations of Stirling engines
- +2 more outcomes
Companies that use Cool Energy
Customer profileNamed customers4 records
Segments3 records
Ideal customer profiles2 records
Cool Energy technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
Cool Energy partnerships and signals
Strategic signalScale indicators5 records
Recent moves6 records
Expansion highlights4 records
Cool Energy competitors and assessment
Company assessmentEmerging players
- BrightSource Energy: BrightSource develops concentrated solar power (CSP) tower plants — using solar thermal heat to drive power generation — competing with Cool Energy's solar thermal use case at utility scale.
Broad incumbents
- Siemens Energy: Siemens Energy offers industrial power generation equipment including turbines, generators, and heat-recovery solutions for utilities and industrial customers, addressing the same power generation and industrial process heat spaces as Cool Energy but at far greater scale.
- Capstone Green Energy: Capstone produces microturbines for distributed power generation, CHP, and waste-heat applications — an adjacent prime-mover technology competing with Stirling engines for the same distributed industrial customer.
- Turboden (a Mitsubishi Power company): Turboden supplies ORC turbo-generators for industrial waste heat recovery, biomass, geothermal, and solar applications — overlapping with ThermoHeart's target segments but backed by a much larger installed base.
- Cummins (Power Generation): Cummins manufactures distributed power generation systems and reciprocating engines for industrial, commercial, and CHP applications — addressing overlapping industrial power customers but not Stirling engines specifically.
- ORMAT Technologies: ORMAT is a leading geothermal and recovered-energy power plant developer and equipment supplier, comparable to Cool Energy's geothermal and industrial heat recovery use cases but at utility scale.
Direct peers
- Qnergy: Qnergy manufactures free-piston Stirling engines for remote power generation, gas compression, and waste-heat-to-electricity applications, making it the closest technology competitor to Cool Energy's ThermoHeart platform.
- ElectraTherm (ElectraThem Power+Cool): ElectraTherm produces Organic Rankine Cycle machines that convert low- and medium-temperature waste heat into electricity, competing directly with Cool Energy's ThermoHeart engines in the same 100-400°C industrial heat recovery segment.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat2 records
Key risks5 records
Key highlights6 records
Customer concentration
Cool Energy social profiles
Digital presenceCool Energy financial estimates
Financial estimateRevenue estimate
Valuation estimate
Cool Energy leadership team
Management profileNumber of profiles
Profiles1 record
Cool Energy funding detail
Funding detailFunding overview
Funding rounds3 records
Investors5 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Cool Energy M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Cool Energy
What does Cool Energy do?
Cool Energy develops Stirling-cycle power-conversion technology, headlined by the ThermoHeart® 25 kW Engine, a single-acting alpha Stirling-cycle machine that converts medium-temperature (100–400°C) thermal energy from industrial waste heat, solar, and geothermal sources into electricity at nearly 30% conversion efficiency. Since 2020 the company has operated a fabrication-free model, monetizing the technology through design licensing for specific applications, Stirling cycle consulting services, and collaborative design and deployment projects with international partners.
Is Cool Energy a public or private company?
Cool Energy is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Cool Energy founded?
Cool Energy was founded in 2006. It employs 1 to 10 people.
Where is Cool Energy based?
Cool Energy is headquartered in Boulder, United States, in the North America region.
How does Cool Energy make money?
Three revenue lines are on record. Consulting Services are the primary driver. The others are design Licensing and collaborative Design and Deployment Projects.
Who are Cool Energy's main competitors?
BrightSource Energy is listed as an emerging player. Broad incumbents are Siemens Energy, Capstone Green Energy, Turboden (a Mitsubishi Power company), Cummins (Power Generation) and ORMAT Technologies. Direct peers are Qnergy and ElectraTherm (ElectraThem Power+Cool).
Does Cool Energy have an API?
No public API is recorded for Cool Energy.
What industry is Cool Energy in?
Cool Energy's product category is Stirling Engine Technology. Its primary akta.pro industry code is EUAAAKAL, Energy Recovery & Power Island Systems (Boilers, turbines, generators, condensers). Its NAICS code is 333611 and its SIC code is 3510.