Keith D. Patch

Keith D. Patch
Keith D. Patch · Consultant

S.B., S.M. Chemical Engineering

About

39
Publications
3,532
Reads
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4
Citations
Citations since 2016
3 Research Items
1 Citation
20162017201820192020202120220.00.20.40.60.81.0
20162017201820192020202120220.00.20.40.60.81.0
20162017201820192020202120220.00.20.40.60.81.0
20162017201820192020202120220.00.20.40.60.81.0
Introduction
Since receiving his S.B. and S.M in Chemical Engineering Practice from MIT over 30 years ago, Keith Patch has worked in technical, management and business development capacities in: electrochemistry (hydrogen and direct methanol fuel cells, high-pressure electrolyzers, and lithium ion batteries); commercial municipal solid waste-to gas-to electricity plant development, large-scale fourth-generation biofuels, ORC heat-to-power conversion systems; biomass, fossil fuels, and nuclear instrumentation
Additional affiliations
October 2014 - November 2015
Joule Unlimited, Inc.
Position
  • Process Engineering Manager
Description
  • Responsible for directing a range of activities related to the development of processes that are efficient, eco-friendly, and commercially-viable for the production of photosynthetically-derived hydrocarbon fuels.
August 2013 - August 2014
Concepts NREC
Position
  • ORC Product Manager
Description
  • Brought on-board to spearhead Concepts NREC's singular new organic Rankine cycle (ORC) energy recovery system as a "startup within a company." Charged with expanding their product portfolio and business on a global scale.
March 2012 - present
Keith D. Patch
Position
  • Founder
Description
  • When not leading technology development/commercialization efforts as a full-time employee, I provide technical and business consulting services to a range of private clients. Topics have included a variety of energy and water supply topics.

Publications

Publications (39)
Preprint
Full-text available
At this conference session, we discussed the latest scientific and technological developments in the hydrogen production and mobility industry from the direction of technological innovation. Hydrogen production enables increased renewables and is delivered at low cost. Involving the development and application of hydrogen production technology and...
Presentation
Full-text available
Keith D. Patch combines his more than 25 years of broad-ranging energy, water and food-based technical and business management experience to highlight the current state of green hydrogen production and utilization. This involves end uses of demanding metropolitan bus and train transit applications, long-distance trucking, ocean-faring maritime, air...
Preprint
Full-text available
A look at the opportunities for green hydrogen and fuel cell electric vehicle technology to assist COVID-19 economic recovery efforts, while simultaneously helping decarbonize heavy duty transportation. Includes a brief look at why implementation issues (schedule & cost issues) make blue hydrogen a poor choice for low-carbon hydrogen production.
Presentation
Full-text available
Joule is the most advanced and most scalable carbon-neutral source of energy for the mobility sector. To date, the company has committed $200MM to develop proprietary 4th-generation algal biofuels technology. All advancements support the industrialization process. Joule's technology involves the direct secretion of either diesel/jet fuel or etha...
Preprint
Full-text available
28% of the world’s total energy use Is wasted but Is potentially recoverable. Can recover 144 GWe of power from this waste heat, worth US$359B (at US$2,500/kWe). World geothermal potential is 148 GWe; World biomass potential is 25 GWe; World solar thermal potential is 25 GWe. Natural energy + waste heat markets: 342 GWe or $854B. An organic Rankine...
Preprint
Full-text available
We need to plan our effort to develop required ORC codes, standards, and regulations. Why? Because today, every country has their own codes, standards, and regulations that apply to ORC components and systems. It makes sense to unify and harmonize these disparate regulations. A few generally applicable international standards exist (ISO, IEC, Inter...
Preprint
Full-text available
28% of the world's total energy use is wasted but potentially recoverable. An organic Rankine Cycle (ORC) heat engine is best suited for making electricity from these low-grade heat sources, using an organic working fluid to match the fluid’s properties with the temperature of the heat source.
Preprint
Full-text available
Concepts NREC has completed its design and development of an integrated high speed axial turbine and permanent magnet generator. The Turbine –Generator Unit (T.G.U.) is ideal for ORC applications for its compactness, reliability, and versatility. The 20,000 rpm TGU does not use a shaft seal or gearbox and the generator is evaporatively cooled using...
Preprint
Full-text available
DESCRIPTION: The overall objective of this project was to develop a lightweight, portable, low-cost device powered by liquid fuel for warming intravenous fluids in-the-field distant from medical infrastructure. Excessive hemorrhage, hypothermia and the accompanying shock are among the emergency conditions that often require timely intravenous infus...
Preprint
Full-text available
Transforming the United States from a fossil-fuel base economy to a “hydrogen economy” will require cost-effective methods for manufacturing and delivering hydrogen. The electrochemical dissociation of water into elemental hydrogen and oxygen is a well known and widely practiced means of generating hydrogen. However, commercially available water el...
Preprint
Full-text available
The impending hydrogen economy will utilize hydrogen from a number of sources; most notably reformers and water electrolyzers. In the later case, the primary energy source can be conventional (fossil fuels, hydroelectric, nuclear) or renewable (solar, wind, biomass).However, regardless of the source of the primary energy or the method of hydrogen p...
Preprint
Full-text available
The U.S. Department of Energy (DOE) must ensure that on-site worker health and safety is not compromised by airborne radioactive contamination. In addition, the DOE must ensure that effluent air and gas streams leaving DOE sites and waste treatment facilities do not negatively impact public safety or health. Alpha-emitting radioisotopes, such as U-...
Article
Full-text available
The U.S. Department of Energy (DOE) must ensure that on-site worker health and safety is not compromised by airborne radioactive contamination. In addition, the DOE must ensure that effluent air and gas streams leaving DOE sites and waste treatment facilities do not negatively impact public safety or health. Alpha-emitting radioisotopes, such as U-...
Article
Full-text available
An apparatus and method for detecting low levels of one or more radionuclides in a fluid sample uses a substrate that includes an ion exchange resin or other sorbent material to collect the radionuclides. A collecting apparatus includes a collecting chamber that exposes the substrate to a measured amount of the fluid sample such that radionuclides...
Preprint
Full-text available
The U.S. Department of Energy (DOE) must ensure that on-site worker health and safety is not compromised by airborne radioactive contamination. In addition, the DOE must ensure that effluent air and gas streams leaving DOE sites and waste treatment facilities do not negatively impact public safety or health. Alpha-emitting radioisotopes, such as U-...
Article
Full-text available
In monitoring effluent leaving its sites, US DOE assays for alpha- emitting radionuclides (U, transuranics) to ensure compliance with regulatory limits. Because alpha emissions can only by detected over a short range in water (â¼40μm), the conventional approach is to collect samples for processing in a central laboratory; a time-consuming and cost...
Article
A method and apparatus are disclosed for increasing the deposition of ions onto a surface, such as the adsorption of uranium ions on the detecting surface of a radionuclide detector. The method includes the step of exposing the surface to a complexing agent, such as a phosphate ion solution, which has an affinity for the dissolved species to be dep...
Preprint
Full-text available
A comprehensive energy use study was successfully completed at the Catholic University of America (CUA). The primary objective of this feasibility study, funded by the U.S. Department of Energy through the Oak Ridge National Laboratory and the Washington Gas Light Company, was to examine ways to improve the energy efficiency of CUA's heat-only dist...
Preprint
Full-text available
Heat-actuated liquid desiccant cooling (LDC) systems directly integrate with District Heating (DH) systems and allow them to become year-round District Heating and Cooling (DHC) systems. Because of their heat-actuated nature, LDC systems enable conventional two-pipe DH systems to be operated as DHC systems without the major capital expense of addin...
Article
Full-text available
A detailed assessment has been completed of the use of desiccant-based customer-sited heat-actuated cooling for District Heating and Cooling (DHC) systems, showing that introduction of a reduced-cost desiccant cooling system would result in widespread market penetration. This program consisted of three principal components: a market study of existi...
Preprint
Full-text available
A detailed engineering study of a combined cogeneration/absorption cooling system is under way at The Toronto Hospital, Toronto General Division (TGH). Results of a previous preliminary study, initiated by Toronto District Heating Corporation (TDHC), showed favorable economics for a natural gas-fueled reciprocating engin-driven cogeneration system...
Article
District heating (DH) systems provide thermal energy to their customers in the form of hot water or steam. These systems can use one or more types of heat sources to meet the thermal load, including boilers, cogeneration systems, or low-grade heat sources in conjunction with a heat pump. Most large-scale heat pumps operate using the closed-cycle co...
Article
Full-text available
This patent describes a method of preheating cullet for use in a glass furnace. The method comprising: introducing cullet into a preheater near the top thereof; allowing glass cullet to fall downward through the preheater to form a raining bed while hot gases are introduced near the bottom of the preheater and allowed to flow upward to directly con...
Article
A major energy loss in industry is the heat content of the flue gases from industrial process heaters. One effective way to utilize this energy, which is applicable to all processes, is to preheat the combustion air for the process heater. Although recuperators are available to preheat this air when the flue gases are clean, recuperators to recover...
Article
Industrial air coolers are usually designed by assuming a given ambient air temperature, whereas they generally operate under constantly fluctuating outside air conditions. Under these circumstances, minimizing only investment and operating costs on a fixed air temperature basis is not sufficiently accurate to optimize operation. The concept of sho...
Article
A technique has been developed for the determination of <sup>227</sup>Ac concentration in soil samples. Emanating <sup>219</sup>Rn is introduced into an air stream and passed through a two‐filter decay tube similar to that reported by Thomas and LeClare for <sup>222</sup>Rn [Health Phys. 18, 113 (1970)]. Experimental tests and theoretical calculati...
Article
A detailed assessment has been completed of the use of desiccant-based customer-sited heat-actuated cooling for District Heating and Cooling (DHC) systems, showing that introduction of a reduced-cost desiccant cooling system would result in widespread market penetration. This program consisted of three principal components: a market study of existi...
Article
A major energy loss in industry is the heat content of the flue gases from industrial process heaters. One effective way to utilize this energy, which is applicable to all processes, is to preheat the combustion air for the process heater. Although recuperators are available to preheat this air when the flue gases are clean, recuperators to recover...
Article
A major energy loss in industry is the heat content of the flue gases from industrial process heaters. One effective way to utilize the energy is to preheat the combustion air for the process heater. Fluidized-Bed Waste-Heat Recovery (FBWHR) System is designed to preheat this combustion air using the heat available in dirty flue gas streams. In thi...
Article
A major energy loss in industry is the heat content of the flue gases from industrial process heaters. One effective way to utilize the energy, which is applicable to all processes, is to preheat the combustion air for the process heater. Although recuperators are available to preheat this air when the flue gases are clean, recuperators to recover...
Article
An assessment has been completed of the use of desiccant-based, heat-actuated cooling for District Heating and Cooling (DHC) systems, showing that such desiccant-based cooling (DBC) systems are generally applicable to District Heating (DH) systems. Since the DH system only has to supply hot water (or steam) to its customers, systems that were desig...
Article
Ten residential heat pipe furnaces were installed at various test homes around the country. Measurements indicated a mean seasonal efficiency for the heat pipe furnace of 83 percent compared with the laboratory determined steady-state efficiency of 85 percent. At those sites where conventional furnaces were used as standards, the heat pipe furnace...
Article
This is Second Quarterly Report for DOE Project {number_sign} FG01-89CE26593 entitled: ``Desiccant-Based, Heat Actuated Cooling Assessment for DHC Systems.`` The goal of the project is to perform a conceptual design, systems analysis and case study evaluation of a application of a desiccant based cooling design within a district heating and cooling...
Article
This is the Third Quarterly Report for DOE Project Number FG01- 89CE26593 entitled: ``Desiccant-Based, Heat Actuated Cooling Assessment for DHC Systems.`` The goal of the project is to perform a conceptual design, systems analysis and case study evaluation of an application of a desiccant based cooling design within a district heating and cooling s...
Article
Concentrations of actinium-227 in soil samples from waste-disposal sites for uranium procession plants were successfully correlated with radon-219 measurements obtained by the two-filter technique, thus avoiding time-consuming and difficult radiochemical analyses. A flow-through sampling device and procedure were developed which determined actinium...
Article
The goal of the project is to perform a conceptual design, systems analysis and case study evaluation of an application of a desiccant-based, heat actuated cooling system in a District Heating System. The results of this study will encourage the deployment of cooler transport temperatures in District Heating Systems. The proposed concept includes a...
Article
Full-text available
The Fluidized-Bed Waste-Heat Recovery (FBWHR) System is a combustion air preheater designed for existing unrecuperated industrial furnaces, where dirty and corrosive flue gases cause severe fouling and materials problems. The FBWHR system solves these problems by using a durable, direct contact heat exchanger, eliminating conventional gas-to-air he...

Questions

Questions (2)
Question
It has been two years, are there any preliminary results you can share?
TIA,
--Keith
@KeithDPatch
Question
Hi All--
I know of many individual efforts that have developed gasification or pyrolysis processes to convert municipal solid waste (MSW) or refuse derived fuel (RDF) to clean pyrolysis (pyro) gas. Can anyone point me to one or more publication(s) that summarize and review these various plants and approaches to create clean pyro gas from municipal waste?
I am especially interested in plants that have not just achieved an operating point and declared success, but plants that have been or are currently producing pyro gas on a commercially-viable, ongoing basis.
Thanks in advance,
--Keith
@KeithDPatch

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