We conducted energy and exergy analyses of an adsorption chiller to investigate the effect recooling-water temperatures on cooling capacity Coefficient Performance (COP) with variable cycle modes. investigated both temperature dead state destruction in components. Our results show that there is optimum reheat mode for each range. For basic single stage cycle, mainly accrued desorber (49%), foll...

Sizing of borehole heat exchangers (BHEs) for direct ground cooling systems (DGCSs) is a critical part the overall system design. This study investigates thermal performance and sizing DGCS with two different operation strategies using experimental simulation approaches. The traditional on/off strategy keeps constant room temperature. continuous has potential to reduce building peak loads by pr...

“Quina” (Strychnos pseudoquina A. St. Hil) is a medicinal plant species from the Brazilian Cerrado. As its seeds show dormancy, they were subjected to the treatments precooling at 5oC during 7 days, pre-heating at 40oC during 7 days, pre-soaking in sulfuric acid PA during 5 and 15 min, pre-soaking in boiling water during 5 and 15 min, pre-soaking in 100 and 200 ppm gibberellic acid during 48 h,...

We optically trap a single nanoparticle in high vacuum and cool its three spatial degrees of freedom by means of active parametric feedback. Using a single laser beam for both trapping and cooling we demonstrate a temperature compression ratio of four orders of magnitude. The absence of a clamping mechanism provides robust decoupling from the heat bath and eliminates the requirement of cryogeni...

SUMMARY The effects of pre-process temperatures (5, 12, 19 and 26 o C), pre-process delay times (3, 9, 21 and 45 hr) and storage times (7, 14 and 21 days) at 0 o C on the quality of stored lowbush blueberries were examined. All treatments were considered both independently and interactively. Quality after storage was defined by changes in 10 attributes, concluded that, under conditions when imp...

The Ranque–Hilsch vortex tube splits a single high pressure stream of gas into cold and warm streams. Simple models for the vortex tube combined with regenerative precooling are given from which an optimization can be undertaken. Two such optimizations are needed: the first shows that at any given cut or fraction of the cold stream, the best refrigerative load, allowing for the temperature lift...

To expand CERN testing capability to superconducting devices that cannot be installed in existing test facilities because of their size and/or mass, CERN is building a new cryogenic test facility for large and heavy devices. The first devices to be tested in the facility will be the S-FRS superconducting magnets for the FAIR project that is currently under construction at the GSI Research Cente...

The paper aims to investigate different measures of passive cooling that are compatible with existing buildings in order to reduce the energy consumption and peak demand associated with the cooling. Both the existing conditions and envisaged thermal comfort preference of the occupants of the building determine which retrofitting technology is most suitable in a particular case. Measures focusin...