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Journal of Thermal Analysis and Calorimetry
Authors: T. Tahri, S. Abdul-Wahab, A. Bettahar, M. Douani, H. Al-Hinai, and Y. Al-Mulla

Abstract  

A theoretical model is formulated in this Part 1 of the paper for simulating the physical process of condensation of the humid air in the condenser of seawater greenhouse that is located in Muscat, Oman. Analyses to the equations, in addition to the theoretical developments of the proposed model are discussed.

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Simulation of the condenser of the seawater greenhouse

Part II: Application of the developed theoretical model

Journal of Thermal Analysis and Calorimetry
Authors: T. Tahri, S. Abdul-Wahab, A. Bettahar, M. Douani, H. Al-Hinai, and Y. Al-Mulla

Abstract  

A theoretical model is developed in Part I of this study to simulate the physical process of condensation of the humid air in the condenser of an existing seawater greenhouse that is located in Muscat, Oman. Application is conducted in this part to validate the theoretical developments. Comparisons are made between the predictions and the existing experimental results. The results indicate that the comparison is well consistent. The effect of the relative humidity, the dry bulb temperature and the solar radiation are also discussed to see their effects on the condensate values.

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this low-grade energy in grain drying, and food processing where low temperature heat is required. An attempt has been made to investigate the feasibility of heat recovery from the condenser of the VC system through an additional heat exchanger known as

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, exergy destruction, exergy efficiency, and the efficiency defects for R502, R404A, and R507A for temperature in the range of −50 to 0 °C and condenser temperature range of 40–55 °C. They concluded that R507A is a better substitute to R502A than that of R

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Abstract  

To sophisticate the nuclear fuel recycling processes, the transfer percentages for Pd, Mo, Te, and Sb should be determined. Each element solution containing NaNO3 or HNO3 was fed consistently into the thin film evaporator regulated in vac and at 50 °C. The analyte percentages in the inside of the lid, in the condenser, and in the distillate were 10-1%/m2, 10-3%/m2, and 10-3% (DF = 105), respectively. The Mo percentage in the condenser was lower by a factor of 10 than those of other elements investigated. The NO3 - percentages were nearly constant despite increasing HNO3 concentrations, however, the ratios decreased with increasing NaNO3 concentrations.

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Abstract  

A solvent extraction techniques has been developed to separate iodine from mercury contained in thyroid tissues for the determinations of129I and127I in human thyroid blocks by neutron activation analysis. The tissue samples are digested with a mixture of 5 ml HCl and 1 ml HNO3 in a round-bottomed flask fitted with a condenser running with cold water to avoid any loss of iodine. Iodine is extracted into 0.1 M dihexyl sulfide solution in xylene leaving the majority of the mercury in the aqueous phase. Iodine is adsorbed on activated charcoal packed in quartz tubes either by heating the xylene containing iodine in the presence of oxygen or by heating the aqueous solution obtained after back extracting iodine from xylene using a saturated sulfur dioxide solution. Iodine is desorbed from the charcoal and trapped into a quartz ampule which is sent for neutron activation.

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A kilélegzett levegő kondenzálása és a kondenzátum (EBC: Exhaled Breath Condensate) vizsgálata napjainkra egyre szélesebb körben terjed el pulmonológiai kutatásokban. Az eljárás során nem invazív úton nyerhetünk mintát a légutakból úgy, hogy a kilélegzett gázkeveréket egy hűtött kamrán áramoltatjuk át, és a kamra falára lecsapódó párát vizsgáljuk. A minta számos különböző mediátort, biomarkert tartalmaz. Kiemelt jelentőségű a különböző, eddig vizsgált biomarkerek közül a pH. Mérése egyszerű, olcsó és az optimális mérési tartományon belül van. Problémát a pH-érték instabilitása jelent, amit főként a minta CO 2 -koncentrációjának változása okoz. Számos publikáció jelent meg, amelyekben különböző légúti megbetegedésekben vizsgálták a kondenzátum pH-ját. Asthma bronchialéban (különösen akut exacerbatióban), valamint krónikus obstruktív tüdőbetegségben (COPD) savasabbnak találták a kondenzátumot. Szteroidkezelés hatására mindkét betegségben emelkedik a pH. Bronchiectasiában, cisztikus fibrosisban, valamint krónikus köhögésben (asthma bronchiale, gastrooesophagealis reflux, rhinitis chronica, ismeretlen eredet) is savasabbnak találták az EBC-mintákat. A légutak savasodása a különböző kórállapotokban fontos szerepet játszhat a betegségek patomechanizmusában, és az ezt jelző EBC-pH szerepet kaphat a légúti megbetegedések követésében.

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at the expansion and compression. 2.1 Components and processes of CO 2 power cycle The subcritical CO 2 cycle is very similar to the simple steam Rankine cycle; therefore it is called the CO 2 Rankine cycle. Evaporator, turbine, condenser, and pump

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at the expansion and compression. 2.1 Components and processes of CO 2 power cycle The subcritical CO 2 cycle is very similar to the simple steam Rankine cycle; therefore it is called the CO 2 Rankine cycle. Evaporator, turbine, condenser, and pump

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Acta Microbiologica et Immunologica Hungarica
Authors: Veronika Bohus, Zsuzsa Kéki, Károly Márialigeti, Krisztián Baranyi, Gábor Patek, János Schunk, and Erika Tóth

2 13 Rao, T. S., Nair, K. V. K: Microbiologically influenced stress corrosion cracking failure of admiralty brass condenser tubes in a nuclear

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