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When Cooling occurs in a direct expansion vapor compression refrigeration system when?
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The cosmological redshift is a direct measure of the expansion of the universe thus independent of direction?
Actually, no on both counts. The redshift is a DIRECT measure of the fact that distant objects are moving away from us. It IMPLIES the expansion of the universe, but doesn't directly measure it. Also, even if it were, it wouldn't necessarily be independent of direction. One recent study indicates that it might not be, which (if true) means the Universe is not expanding isotropically.
What does shell structure mean?
Shell structures predominantly resist loads on them by direct compression. That is without bending or flexure. Since most materials are more effective in compression than in bending, shell structures result in lesser thickness than flat structures. Please also see the related question below.
Is gay-lussac's law direct or indirect?
Direct Relationship
How to convert Volts to grams?
"Volt" is the unit of electromotive force (potential difference). "Gram" is a unit of mass. There is no direct relationship between them, and no conversion. =========================================== Then we went and read the comment in the discussion area. Something's wrong with the dimensional expansion. If everything there is true, then you wind up with dimensions [ g ] = [ g / Amp ] as we think you said. There are a couple of fractions in the dimensional expansion that we don't recognize, so we can't troubleshoot it, but we're suspecting that's where the problem is. What's the process going on here ? Is this some kind of electrolysis/electroplating/deposition ?
Does refrigerant enter evaporator as a liquid in a direct expansion evaporator?
It will, in basically all cases be a mixture of liquid and vapor, which means the refrigerant is saturated but with a few bubbles entering the evaporator. In a properly operating system though entering the metering device should be solid liquid and some sub-cooling (sub-cooled means cooler then saturation and therefore= no vapor) but then through the metering device (TXV, cap tube, orifice) some of the liquid will boil off, which is called flash gas, in order to cool the refrigerant down as saturated temperature goes down (the pressure to boiling point relation, as pressure is reduced boiling point is lowed). The amount of flash gas is directly related to the specific heat of the refigernt (BTUs/lb), the number of degrees you are cooling the refrigerant (eg. 95 to 45), and the latent heat of vaporization (BTUs/lb for change of state. liquid to vapor)
What is indirect refrigeration system?
Indirect and direct refrigeration systems are typically used on LPG carriers for cooling different cargos. Indirect systems cool the cargo by a refrigerant without being compressed. In the direct refrigeration cycle the cargo is compressed, condensed and returned to the tanks. The safer method is indirect refrigeration because the cargo never mixes with the refrigerant.
What is a Direct-expansion coil air conditioner?
In a direct-expansion (DX) unitary system, the evaporator is in direct contact with the air stream, so the cooling coil of the airside loop is also the evaporator of the refrigeration loop. The term "direct" refers to the position of the evaporator with respect to the airside loop. The term "expansion" refers to the method used to introduce the refrigerant into the cooling coil. The liquid refrigerant passes through an expansion device (usually a valve) just before entering the cooling coil (the evaporator). This expansion device reduces the pressure and temperature of the refrigerant to the point where it is colder than the air passing through the coil. The components of the DX unitary system refrigeration loop (evaporator, compressor, condenser, expansion device and even some unit controls) may be packaged together, which provides for factory assembly and testing of all components, including the electrical wiring, the refrigerant piping, and the controls. This is called a Packaged DX system. Alternatively, the components of the refrigeration loop may be split apart, allowing for increased flexibility in the system design. This is called a Split DX system. Separating the elements has the advantage of providing the system design engineer with complete flexibility to match components in order to achieve the desired performance. One of the most common reasons for selecting a DX system, especially a packaged DX system, is that, in a smaller building, it frequently has a lower installed cost than a chilled-water system because it requires less field labor and has fewer materials to install. Packaged DX systems that use air-cooled condensers can be located on the roof of a building, in a small equipment room, or even within the perimeter wall of the building. Additionally, if the tenants are paying the utility bills, multiple packaged DX units may make it easier to track energy use, as only the specific unit serving that tenant would be used to meet the individual cooling or heating requirements.
What is a direct expansion evaporator?
Refrigerant enters a direct expansion evaporator as a saturated liquid vapor mix and leaves as a superheated vapor.
What is a dx type air conditioning unit?
Direct Expansion. It has refrigeration coils INSIDE the air handler, instead of separate like a split-system. Also, not using chilled water from a separate chiller as many non-dx air handlers do.
What is the full form of DX?
direct expansion system
Is a cooling pad or a fan powered cooling tray better for a laptop?
Heat is the number enemy of computer components. The hotter the components get the greater the thermal expansion process affects them. When a component gets hot it expands and as I cools it contracts. This process has a direct affect on the life of the laptop. Easing the affects of this process through the use of a laptop cooling device will have a positive effects on the device.
What is the direct expansion valveand how does it work in the system what are the different between the direct expansion valve and the indirect expansion valve?
A direct expansion valve, sometimes called a DX valve, modulates the amount of refrigerant fluid, entering as a liquid, allowed into a heat exchanger. Past the DX valve the pressure is much lower and a warmer fluid on the other side of the piping in a heat exchanger boils the refrigerant fluid into its gas, absorbing heat and cooling the warmer fluid. Most commonly one sees this on a household air conditioning system where the warmer fluid being cooled is air from the house, which will then be sent back into the house to cool it. The DX valve modulates the amount of liquid refrigerant let in to cool the air and assure that the refrigerant is all boiled off by the time it leaves the cooling coil. If it were not all boiled into a gas, liquid could reach the refrigerant compressor, the next step in the refrigerant gasses circulation loop. Liquid is very difficult to compress and it would (and sometimes does) break the compressor when either the DX valve has not worked correctly or there has been some other technical malfunction. There is no "indirect expansion valve" to contrast to the direct one. Instead the "direct" adjective distinguishes the direct cooling of the air by the expanding, boiling refrigerant from the more typical secondary fluid, usually water, used in larger systems to cool the air indirectly. "Indirectly" because water is not the primary source of cooling, the boiling refrigerant is; it cooled the water first.
Can you fit a 5.9 liter engine in a durango that has a 4.7 liter?
Not a direct fit. The trans, wiring, computers, cooling , etc are all different.Not a direct fit. The trans, wiring, computers, cooling , etc are all different.
What are the advantages of flooded type cooler over direct expansion type cooler in chiller?
flooded type cooler is a cooler that is being flooded while direct expansion type is a type that is being directly expanded.
What should the casualty be wrapped in during direct cooling?
wt blankets and or sheets
What helped bring a end to the cattle drives?
The expansion of railways was the direct cause of this.
What is the expected temperature drop through a direct expansion evaporator coil is?
The expected temperature drop through a direct-expansion evaporator coil is 20°F. The evaporator coil became clogged during the adjustment period.
