A 3-D flow and heat transfer theoretical model was established for a 5 mm micro-fin tube to explore the characteristics of supercritical CO2/R41 therein under different pressures, mass fluxes, components. The research attempts provide reference selecting components working media setting pressure flux in application scenarios. Results show that closer temperature medium critical temperature, lar...

The issue of high concentration salt in soil is not restricted to coastal areas, but also expands cultivated lands, complicating, or even intercepting, the growth plants. objective this paper study effect zeolite, compost and effective microorganisms (EM), seaweed extract, ceramic powder on MM106 apple (Malus domestica Borkh.) plants normal saline conditions. More specifically, weight dry matte...

Intercropped corn (Zeu mays L.) and soybean [Glycine mux (L.) Merr.] may produce more total yield per hectare than either grown separately, ie., land equivalent ratio (LER) >l. Low N fertility, limited moisture, and weed competition have each been reported to result in high land equivalent ratios. Thus it was hypothesized that intercropping advantages were greater under stress conditions. The o...

The objective of this study was to verify whether caries and periodontal diseases, when present on the distal surface of the second molars (M2s), are associated with the eruption of the third molars (M3s). In this split-mouth study, we evaluated 70 elderly patients with unilateral maxillary or mandibular M3s who presented to the outpatient clinics of two hospitals. Patients underwent comprehens...

In this research, heat transfer enhancement and simultaneous effect of that on pressure drop inside condensers with twisted tape inserts are investigated. A refrigeration system is designed for attaining to maximum level of heat transfer with minimum pressure drop. The test condenser is a double pipe heat transformer with inner and outer diameter of 10.7mm and 12.7mm for internal pipe, respecti...

Nowadays, global environmental events such as thinning of the ozone layer and climate changes are increasing. These types not only affecting all creatures living on Earth, but also decreasing quality life. For this reason, natural refrigerants which harmful to environment, have been preferred in cooling systems. In study, heat transfer coefficient CO2 was investigated during evaporation process...

The dynamics of water confined in H-ZSM-5 (protonated form the Zeolite Socony Mobil – 5) has been studied using quasielastic neutron scattering (QENS) and classical molecular simulations (MD). QENS measurements probed ZSM-5 samples with Si/Al ratios 15, 40 140 at 2.8 wt% loadings. In lower silica samples, fitting elastic incoherent structure factor (EISF) showed that diffusion was to a sphere (...

An integrated divertor simulation code, SONIC, has been developed in order to predict a self-consistent transport solution of the plasma, neutral and impurities scrape-off layer (SOL) divertor. SONIC code contributed determining design power handling scenarios for Japanese (JA) fusion demonstration (DEMO) reactor. Radiative cooling scenario Ar impurity seeding performance have demonstrated eval...

where ρ [ kg m3 ] is the mass density of the phase α; ε [1] is the volume fraction occupied by the phase α; q [ m s ] is Darcy’s velocity of the phase α; ω i [1] is the mass fraction of component i in the α phase; Ji [ kg m2s ] is the flux vector representing the diffusive flux of component i in the phase α; f i [ 1 s ] is the source of component i in the phase α; ei [ 1 s ] is the gain of mass...

In this study, the flow boiling heat transfer and pressure drop characteristics of refrigerant R134a in micro-channels were experimentally investigated. The tests performed circular horizontal with inner diameters 0.5 mm 1 a heating length 300 mm. mass velocities varied from 500 kg/m2s to 2500 kg/m2s, fluxes 15 kW/m2 147 kW/m2. coefficient (HTC) frictional (FPD) measured discussed detail. Accor...