There are many combat vehicle and equipment applications where an air-cooled heat exchanger must operate in an en- vironment with high concentrations of sand and dirt in the ambient air. conventional compact heat exchangers are ssus- ceptible to clogging of cooling fins. one approach that may offer… More

The storage and use of combustilble liquids. various scenarids are possible in which the liquid is accidentally released such that is contracts a hot surface resulting in a potential fire or explosion hazard. the optimum design of appropriate safety measures is severely hampered by the fact that the… More

The loosening of intramedullary anchored components of hip prosthesis is a significant problem associated with an otherwise very successful surgical procedure. identification of loosening at early stages may provide the basis to prolong the service of the implant by allowing prescription of limited… More

A serious problem in heat exchangers where atmospheric air is cooled to cryogenic temperatures is that the ambient water vapor and co(2) freeze onto the heat transfer surfaces. as the solid deposits accumulate they adversely affect performance by decreasing heat exchanger effectiveness and… More

The waste heat exchanger is often the largest single component in diesel-exhaust powered air conditioning systems, and on account of its high material content, is often the heaviest and most costly as well. the need exists for a heat exchanger design and fabrication technique which is compact and… More

A machine to evaluate the friction and wear properties of materials at temperatures up to 1000 deg c is proposed. both lubricated and unlubricated testing with liquids and solids will be possible using a pin-on-disc geometry. complete control over the test atmosphere and manual or computer-control… More

The objective of the proposed project is to evaluate the feasibility of an on-line monitor of oil condition which would detect the presence and nature of debris particles in lubricating oil systems. this would provide a more timely and less labor intensive method of oil condition monitoring than… More

We will develop an instrument based upon hall effect sensors for measuring three dimensional distribution of pressure at the interface between two surfaces. the primary goal is to measure the pressure distribution of feet when in contact with a surface. while many researchers in biomechanics are… More

Measurement of postural sway is now being used to investigate the effects of drugs, toxins, and aging on the neuromuscular system of humans and to devise strategies to help elderly individuals reduce the risk of falling. one popular method of measuring sway is with a force platform; however, current… More

The impact attenuation properties of playground surfaces affect the likelihood of head injuries due to falls. laboratory testing evaluates the impact properties of playground surfaces, but no field test instruments are available. ease-of-use, durability, and cost all affect the commercial success of… More

A self-pumping water heater is proposed wherein a small portion of the water to be pumped is evaporated in a boiler and used to pressurize and heat the main stream of water. Unlike early slow direct-acting steam pumps, the proposed approach operates at moderate frequencies and is extremely compact.… More

A new machining technique, described as a cross between a wire edm (electric discharge machine) and an ecm (electrochemical machine), is being investigated. the metal removal process involves the anodic dissolution of the workpiece in close proximity to a moving wire, similar to the spark erosion… More

The XA2 gasoline burner is widely used by the military to meet a variety of food preparation and heating requirements in the field. Because of the trend toward an single-fuel Army vehicle fleet and away from gasoline as a general purpose fuel, a diesel/JPS fueled burner is sorely needed. A… More

50854-98-I Development of Corrosion Inhibitors for Absorption Heat Pumps--Advanced Mechanical Technology, Inc., 176 Waltham Street, Watertown, MA 02172-4809; (617) 926-6700 Dr. Joseph Gerstmann, Principal Investigator Mr. Andrew D. Vasilakis, Business Official DOE Grant No.… More

A compact, reliable, efficient and inexpensive crycooler requiring less than 1kW of power for 2W of colling at 10K will be developed and demonstrated. This performance is at least twice as efficient as the best current state-of-the-art for smalllow-temperature crycoolers. The proposed technical… More

"A compact, reliable, efficient and inexpensive cryocooler requiring less than 1kW of power for 2W of cooling at 10Kelvin is being developed and will be demonstrated. This performance is at least twice as efficient as the best current state-of-the-art forsmall low-temperature cryocoolers. The… More

"Military field feeding operations require an easily transportable and energy-efficient system to recycle the greywater produced in ware washing. A multiple-effect evaporator is proposed that will distill the greywater, heated by a diesel/JP-8 powered oilburner or other available liquid/vapor… More

A compact, reliable, efficient and inexpensive cryocooler requiring less than 1 kW of power for 2W of cooling at 10 Kelvin is being developed and will be demonstrated. This performance is at least twice as efficient as the best current state-of-the-artfor small low-temperature cryocoolers. The… More

A compact, reliable, efficient and inexpensive cryocooler requiring less than 1 kW of power for 2W of cooling at 10 Kelvin is being developed and will be demonstrated. This performance is at least twice as efficient as the best current state-of-the-artfor small low-temperature cryocoolers. The… More

A compact, reliable, efficient and inexpensive cryocooler requiring less than 1 kW of power for 2W of cooling at 10 Kelvin is being developed and will be demonstrated. This performance is at least twice as efficient as the best current state-of-the-artfor small low-temperature cryocoolers. The… More

75859 Absorption refrigeration is the only currently available method that utilizes low-temperature waste heat to provide cooling. Unfortunately, absorption cooling systems for commercial and small industrial applications are relatively large and expensive, require costly-to-maintain cooling… More

DESCRIPTION (provided by applicant): Over 299,000 total knee replacement procedures were conducted in 2002 with projections to 474,000 by 2030. It is estimated that the annual cost of TKR exceeds $6 billion in the US. Despite the success of TKR revision surgery accounts for between 8 and 9 percent… More

Recent world events have highlighted the need for timely and accurate intelligence data to assess threats and combat terror. An unmanned surface vehicle (USV ) can potentially perform intelligence, surveillance and reconnaissance (ISR) missions, provide force protection, hunt for mines in coastal… More

Field combat load assessment for combat training and combat mission personnel load management is an identified military need. The combat load assessment device or CLAD must meet several requirements not found in off-the-shelf commercial or consumer weighing devices. Weight requirements, accuracy… More

Helium plays several critical rolls in spacecraft propulsion. High pressure helium is commonly used to pressurize propellant fuel tanks. Helium cryocoolers can be used to sub-cool and thereby densify cryogenic propellants such as liquid hydrogen (LH2) and liquid oxygen (LO2). The use of densified… More

Future lunar and planetary explorations will require the storage of cryogenic propellants, particularly liquid oxygen (LOX) and liquid hydrogen (LH2), in low earth orbit (LEO) for periods of time ranging from days to months, and possibly longer. LEO is a relatively warm thermal environment and… More

According to existing data, there are more than 1.5 million of Americans sustaining a Traumatic Brain Injury (TBI) each Year. Balance disorders represent one of the main regular problems that patients have to deal with, and thus everyday. Rehabilitation programs do exist but they are dependable of… More

Cooking appliances in U.S. Army field kitchens are currently heated by burning JP-8 fuel using electrically powered burners. Power is supplied by a separate JP-8 fired generator that serves multiple appliances simultaneously. This is inefficient, as generators are only 20-25% efficient, and… More

Cooking appliances in U.S. Army field kitchens are currently heated by burning JP-8 fuel using electrically powered burners. Power is supplied by a separate JP-8 fired generator that serves multiple appliances simultaneously. This is inefficient, as generators are only 20-25% efficient, and… More