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tank and heat exchanger. The later part of this paper covers the alternative refrigerant technology and technological …
Persistent link: https://www.econbiz.de/10010608378
HCFC-22, widely used in variety of refrigerating/heating equipment, has been scheduled to be phased out by Montreal Protocol. This decision will result in significant reduction of ozone depletion and global warming, holding on the climate benefits accrued so far. In this paper, significant...
Persistent link: https://www.econbiz.de/10010807613
In this paper, a solar assisted heat pump is modelled and optimized. Solar panel surface areas, evaporator pressure, condenser pressure, capacity of heat storage tank as well as the value of superheating/subcooling in evaporator/condenser are selected as design parameters. MOPSO (Multi-objective...
Persistent link: https://www.econbiz.de/10010809735
In residential applications, an air-to-water CO2 heat pump is used in combination with a domestic hot water storage tank, and the performance of this system is affected significantly not only by instantaneous ambient air and city water temperatures but also by hourly changes of domestic hot...
Persistent link: https://www.econbiz.de/10010811609
As a mean to mitigate global humanlinked environmental pollution and to achieve sustainability, renewable energies must become not just a part but THE primary energy source for the world. Heat pumps, as a process recirculating environmental heat back into useful heat production, fit the...
Persistent link: https://www.econbiz.de/10010805401
natural refrigerant R-744. Various parameters affecting the heat transfer coefficient subject to lubricant, such as oil … convectional refrigerant. For gas cooling, the lubricant cast significant effect on heat transfer coefficient especially for a …
Persistent link: https://www.econbiz.de/10010664546
water and refrigerant (working fluid) as heat removal medium for different applications has been conducted. Future direction … of water-cooled and refrigerant hybrid photovoltaic thermal systems was presented. This study revealed that the direct …
Persistent link: https://www.econbiz.de/10010577202
associated bubble characteristics of a refrigerant in a narrow vertical duct. A high-pressure flow boiling test loop was built … measurement of heater surface temperature. Refrigerant R-134a is used as the test fluid at different pressures ranging from 690 to …
Persistent link: https://www.econbiz.de/10011053541
A szerzõ azt vizsgálja, milyen csatornákon keresztül mozdíthatja elõ az informatikai szektor a világgazdaság centrumán kívüli gazdaságok modernizációját. Az informatikai feldolgozóiparnak a „globális iparág” sajátosságaiból következõen jelentõs felzárkóztatási...
Persistent link: https://www.econbiz.de/10010963149
Az írás bemutatja az innovációvezérelt növekedést övező fogalmi tisztázatlanságokat. Áttekinti az innovációvezérelt növekedés formális mérésére tett eddigi statisztikai, módszertani fejlesztéseket, különös tekintettel az immateriális beruházások mérésére és a...
Persistent link: https://www.econbiz.de/10010963187