May 17, 2020

Improvements in Waste Heat Recovery

energy digital
waste heat
waste heat recovery
3 min
energy, waste heat, waste heat recovery, energy retriever system, ERS, Harlequin Motors, battery storage, cooling, supplemental heat, internal combustion engines
Harlequin Motors has just received a US patent of its Energy Retriever System (ERS) that acts not only as a waste heat recovery unit, but als as a com...


Harlequin Motors has just received a US patent of its Energy Retriever System (ERS) that acts not only as a waste heat recovery unit, but als as a complete system offering cooling capabilities, supplemental heat (for cold operating environments) and battery storage options.

The Energy Retriever System operates on a simple yet elegant premise. All internal combustion engines produce heat, but waste most of it. The ERS system captures the waste heat and harnesses it to propel the vehicle and to power most of the electrical equipment. The heat is passed on to a gas that is compressed into a liquid until it reaches critical temperature. The resulting pressure from this process is used to power turbines that turn generators and alternators to produce electricity. This electricity is used to power motors that assist in propelling the vehicle, charge batteries and provide power to the vehicles ancillary systems.

The ERS can be adapted for use on all types of motorized land vehicles (especially military, municipal, semi-trucks, private cars and city/county operated vehicles), some buildings as well as all ships and motorized watercraft. It can also be retrofitted to fit existing engines under certain circumstances.

Known Commercial Use

Harlequin is aware of several other systems already on the market, none of which are capable of the Energy Recovery System efficiency. Additionally, most commercial systems require much more alterations of the engines, maintenance, monitoring during operation, higher cost of installation and a higher cost of operation. They are limited in the types of mediums available whereas the ERS is not. And in most cases they weigh more, use a less efficient means of absorbing heat, and require a greater warm up time as well.

Existing Waste Heat Recovery Systems

Of the technologies that are currently being developed for energy recovery applications, thermoelectric generators (TEG) and organic Rankin cycle (ORC) systems are two approaches receiving considerable individual attention. The use of TEGs in heat recovery applications has been a major theme in the development of the field since the 1990s. Combining these two approaches into a dual-cycle system for thermal energy recovery has been researched where each system can operate in a different temperature space. 


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The ERS can work effectively over a broader range of temperatures, while TEGs can work effectively only across narrow temperature ranges. In addition most current systems try to recover heat at the very end of the engine exhaust point. The ERS will absorb heat all along the exhaust path from the engine and conclude at the engine exhaust. The ERS also works to reduce the load on the engine. All of the system components work to maximize the total waste heat recovered and maximize the overall efficiency.

The Inventor

Paul Corley's lifelong work with engines has helped to build his understanding of waste heat and methods to recover it. He spent 26 years as an officer piloting, navigating, engineering, and maintaining a variety of fresh-water and open-ocean vessels from tug boats to ocean going cargo vessels and over 25 years studying, building, maintaining and improving a variety of internal combustion engines. He is an experienced automobile mechanic who has built and rebuilt a number of classic sports cars and racing automobiles.

Mr. Corley is willing and eager to work with the licensee, to manufacture and implement the system, and eventually take it to the market. Mr. Corley would like very much to be involved as a collaborator, in order to see the project be successful, and to eventually see the ERS used extensively across the world.

For more information contact Martin Kamerman [email protected]


Edited by Carin Hall




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Oct 19, 2020

Itronics successfully tests manganese recovery process

Scott Birch
3 min
Nevada firm aims to become the primary manganese producer in the United States
Nevada firm aims to become the primary manganese producer in the United States...

Itronics - a Nevada-based emerging cleantech materials growth company that manufacturers fertilisers and produces silver - has successfully tested two proprietary processes that recover manganese, with one process recovering manganese, potassium and zinc from paste produced by processing non-rechargeable alkaline batteries. The second recovers manganese via the company’s Rock Kleen Technology.

Manganese, one of the four most important industrial metals and widely used by the steel industry, has been designated by the US Federal Government as a "critical mineral." It is a major component of non-rechargeable alkaline batteries, one of the largest battery categories sold globally.

The use of manganese in EV batteries is increasing as EV battery technology is shifting to use of more nickel and manganese in battery formulations. But according to the US Department of Interior, there is no mine production of manganese in the United States. As such, Itronics is using its Rock Kleen Technology to test metal recoverability from mine tailings obtained from a former silver mine in western Nevada that has a high manganese content. 

In a statement, Itronics says that its Rock Kleen process recovers silver, manganese, zinc, copper, lead and nickel. The company says that it has calculated – based on laboratory test results – that if a Rock Kleen tailings process is put into commercial production, the former mine site would become the only primary manganese producer in the United States.

Itronics adds that it has also tested non-rechargeable alkaline battery paste recovered by a large domestic battery recycling company to determine if it could use one of its hydrometallurgical processes to solubilize the manganese, potassium, and zinc contained in the paste. This testing was successful, and Itronics was able to produce material useable in two of its fertilisers, it says.

"We believe that the chemistry of the two recovery processes would lend itself to electrochemical recovery of the manganese, zinc, and other metals. At this time electrochemical recovery has been tested for zinc and copper,” says Dr John Whitney, Itronics president. 

“Itronics has been reviewing procedures for electrochemical recovery of manganese and plans to move this technology forward when it is appropriate to do so and has acquired electro-winning equipment needed to do that.

"Because of the two described proprietary technologies, Itronics is positioned to become a domestic manganese producer on a large scale to satisfy domestic demand. The actual manganese products have not yet been defined, except for use in the Company's GOLD'n GRO Multi-Nutrient Fertilisers. However, the Company believes that it will be able to produce chemical manganese products as well as electrochemical products," he adds.

Itronics’ research and development plant is located in Reno, about 40 miles west of the Tesla giga-factory. Its planned cleantech materials campus, which will be located approximately 40 miles south of the Tesla factory, would be the location where the manganese products would be produced.

Panasonic is operating one of the world's largest EV battery factories at the Tesla location. However, Tesla and other companies have announced that EV battery technology is shifting to use of nickel-manganese batteries. Itronics is positioned and located to become a Nevada-0based supplier of manganese products for battery manufacturing as its manganese recovery technologies are advanced, the company states.

A long-term objective for Itronics is to become a leading producer of high purity metals, including the U.S. critical metals manganese and tin, using the Company's breakthrough hydrometallurgy, pyrometallurgy, and electrochemical technologies. ‘Additionally, Itronics is strategically positioned with its portfolio of "Zero Waste Energy Saving Technologies" to help solve the recently declared emergency need for domestic production of Critical Minerals from materials located at mine sites,’ the statement continues.

The Company's growth forecast centers upon its 10-year business plan designed to integrate its Zero Waste Energy Saving Technologies and to grow annual sales from $2 million in 2019, to $113 million in 2025.

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