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  2. Calorimeter - Wikipedia

    en.wikipedia.org/wiki/Calorimeter

    Calorimeters can be used to measure the efficiency of geothermal energy conversion processes. Through measuring the heat input and output of the process, engineers can determine how effective the plant is at converting geothermal energy into usable electricity or other forms of energy.

  3. Thermodynamic instruments - Wikipedia

    en.wikipedia.org/wiki/Thermodynamic_instruments

    In fact, this equation is more than a phenomenological equation, it gives an operational, or experimental, definition of temperature. A thermometer is a tool that measures temperature - a primitive thermometer would simply be a small container of an ideal gas, that was allowed to expand against atmospheric pressure.

  4. Flameless ration heater - Wikipedia

    en.wikipedia.org/wiki/Flameless_ration_heater

    The inventors later incorporated under the name Zesto-Therm Inc. and patented the meal heating product (now called the ZT Energy Pad), and began selling it for civilian use. [ 1 ] : 2-4 In 1986 the U.S. Army evaluated the ZT Energy Pad and found that it did not always heat the food adequately and left a messy residue on the outside of the food ...

  5. Vacuum flask - Wikipedia

    en.wikipedia.org/wiki/Vacuum_flask

    A vacuum flask (also known as a Dewar flask, Dewar bottle or thermos) is an insulating storage vessel that slows the speed at which its contents change in temperature. It greatly lengthens the time over which its contents remain hotter or cooler than the flask's surroundings by trying to be as adiabatic as possible.

  6. List of measuring instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_measuring_instruments

    Processes transferring energy from a non-thermal carrier to heat as a carrier do produce entropy (Example: mechanical/electrical friction, established by Count Rumford). Either the produced entropy or heat are measured (calorimetry) or the transferred energy of the non-thermal carrier may be measured. calorimeter

  7. Calorimetry - Wikipedia

    en.wikipedia.org/wiki/Calorimetry

    Calorimetry requires that a reference material that changes temperature have known definite thermal constitutive properties. The classical rule, recognized by Clausius and Kelvin, is that the pressure exerted by the calorimetric material is fully and rapidly determined solely by its temperature and volume; this rule is for changes that do not involve phase change, such as melting of ice.

  8. Thermal bag - Wikipedia

    en.wikipedia.org/wiki/Thermal_bag

    A thermal bag is a type of thermally insulated shipping container in the form of a bag which can be carried, usually made of thermally insulating materials and sometimes a refrigerant gel. It is used to help maintain the temperature of its contents, keeping cold items cold, and hot items hot.

  9. Self-heating food packaging - Wikipedia

    en.wikipedia.org/wiki/Self-heating_food_packaging

    Commercial heat sources for self-heating food packaging use an exothermic (heat releasing) reaction, for which there are several common formulations. These include: Quicklime aka calcium oxide, and water. Quicklime, inexpensive and readily available, is generally recognized by the FDA as safe. [2] The product of the reaction is calcium hydroxide.

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