Miedema Model
In view of the ozone depletion and global warming effects of CFCs, environments friendly and energy efficient refrigeration and heat pump technologies have assumed a greater importance. It is generally recognized that though the replacement of the conventional working fluids with the new fluids somewhat alleviate the problem of ozone depletion; many other technical and economic problems remain unsolved. Hence studies on alternate technologies for cooling and heating are carried out in which the metal hydrides systems are found very interesting and promising. Several studies on heat operated metal hydride cooling and heating systems have established the technical feasibility of such systems but the economic viability for cooling and heating is yet to be established.The concept of compressor driven metal hydride cooling and heating systems is not very new and these systems were first conceptualized in 1975 by Wolf, and a US patent for the basic concept was granted in 1977. But at that time as the effects of CFCs and HCFCs on ozone depletion was not understood fully, and hence there was no great motivation to try alternate technologies. After Montreal Protocol (Mandatory replacement of CFCs and HCFCs) severa
Some topics in this essay:
Hydrides Miedema’s, MIEDEMA MODEL, STUDY NANOCRYSTALS, , De Chatel, CFCs HCFCs, THERMODYNAMIC MODEL, QÄNws1/32------------------------1 Historically, FBA VA2/3, ABx H2, transition metals, enthalpy formation, metal hydride, hydrogen content, cooling heating, metal hydride systems, electronic charge, pure metals, hydride systems, grain boundary, nanograin size, chemical potential electronic, electron density boundary, potential electronic charge, significant systematic variations,
Join now to see the rest of the essay!
Approximate Word count = 1554
Approximate Pages = 6 (250 words per page double spaced)
|
Example Essays Home
