What is meant by parallel flow heat exchanger?
In heat exchanger. This flow arrangement is called parallel flow. Heat is transferred from the warm fluid through the wall of the inner tube (the so-called heating surface) to the cold fluid. A heat exchanger can also be operated in counterflow, in which the two fluids flow in parallel but opposite directions.
What are the advantages of a parallel flow system?
Parallel flow is similar to a electrical parallel circuit in which several parallel flow circuits of equal length connect to a supply header and a return header. A benefit of parallel is that a small diameter pipe can be used due to lower pressure drops and same money on installation.
When a coaxial heat exchanger becomes coated with minerals the cooling cycle symptom would be?
four-way valve. When a coaxial heat exchanger becomes coated with minerals, the cooling cycle symptoms would be: high head pressure.
Which one is having the highest value of fouling factor?
Which one is having the highest value of fouling factor? Explanation: Fouling factor for liquid gasoline is 0.0008 while that of clean river, sea water and distilled water are 0.0002, 0.0001 and 0.0001 respectively. Fouling factor = 1/hS. 2.
How does the GREY body differ from the black body?
a black body is an object that absorbs all the radiant energy reaching its surface from all the direction with all the with all the wavelengths. Gray body: A gray body is defined as a body whose absorptivity of a surface does not vary with variation in temperature and wavelength of the incident radiation.
Does a black body actually exist?
Its emission is called black-body radiation. The concept of the black body is an idealization, as perfect black bodies do not exist in nature. Graphite and lamp black, with emissivities greater than 0.95, however, are good approximations to a black material.
What is a black body source?
A blackbody is a physical material with zero reflectivity and perfect emission. Blackbody sources are uniform, temperature stable sources of infrared radiation that approximate the ideal blackbody. The primary function of a blackbody source is to provide certain sources for calibrating infrared sensors and systems.
Is black hole a black body?
Yes, black holes are supposedly near-perfect black bodies. They emit thermal radiation called Hawking radiation, which, however, does not originate from beyond the event horizon, but is a consequence of the interaction of the strong gravitational field outside the horizon with the vacuum.
What is perfect black body in physics?
A blackbody refers to an opaque object that emits thermal radiation. A perfect blackbody is one that absorbs all incoming light and does not reflect any. At room temperature, such an object would appear to be perfectly black (hence the term blackbody).