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At Tafilah, Jordan

Tafila Technical University , is a public university in Jordan. Wikipedia.

AlQdah K.,Tafila Technical University
Energy Conversion and Management | Year: 2010

Rising concern about energy resource availability and energy prices in Jordan, cost of energy has become an issue that cannot be ignored in Jordan's industrial sector. In this study, energy auditing in a meat production factory related to poultry company was carried out. Based on the collected data and the conservation laws of energy, the performance of steam boilers, domestic hot water boilers, compressors, refrigeration systems, chillers, pumps, daily consumption of diesel and water were reviewed. The percentage of energy consumed by the refrigeration units, with respect to the total energy consumed, has been estimated. The results demonstrated a normal operation with thermal efficiency of 80.66% for the steam boiler, ability to save 18818.99 JD by installing economizer with payback period of 0.637 year and a 12.3% reduction of the energy cost achieved by reducing the blow down rate. The rate of diesel consumption was reduced by 12.87% over the last period of the study as a result of the recommendations that have been submitted to the technicians and professionals. The sum of 22223.77 JD can be saved by using heavy fuel oil instead of diesel oil. Moreover, this study demonstrated that energy saving can be considered as an ideal choice to increase profit and promote competition within the poultry industry if the company adopts all the proposals and recommendations that have been offered by this study. © 2009 Elsevier Ltd. All rights reserved. Source

This manuscript analyzes the sub-systems of evaporative cooler (EC) combined with desiccant dehumidification and regeneration for automotive air conditioning purpose. The thermodynamic and psychometric analysis was conducted to design all evaporative cooling system components in terms of desiccant selection, regeneration process, compact heat exchanger and evaporative cooler. Moreover, the effect of the desiccant, heat exchanger and evaporative performances on the mass flow rate and water sprayed required for evaporative cooling system was investigated. The results show that the theoretical evaporative cooling design will achieve two main objectives: lower fuel consumption and less environmental pollutants. However, it has the two drawbacks in terms of increased weight and reduces the coefficient of performance (COP). The main remark is that evaporating cooling system is more efficient than the conventional air conditioning when the gasoline price is more than 0.34 $/liter. © 2015 Elsevier Ltd. All rights reserved. Source

Al-Rawajfeh A.E.,Tafila Technical University
Journal of Industrial and Engineering Chemistry | Year: 2010

The purpose of this work is to model the CaCO3-CO2-H2O system in falling film on a bank of horizontal tubes. The model was applied on a 5-effects reference thermal vapor compression multiple-effect distiller (MED-TVC) operating at top brine temperatures (TBT) of 60-70°C. The model can predict pH values, CaCO3 deposition and fouling resistance with greater accuracy. Through the MED stages, the HCO3 - and CO2 concentrations slightly increased while the CO3 2- concentration slightly decreased. The pH decreased from 8.8 in the first stage to 8.4 in the 5th stage. The CO2 release rates as well as the CaCO3 deposition rates increase with increasing top brine temperature (TBT). CO2 release rates decrease from 36.4g/t feed water in the first stage to 32.5g/t in the last stage. The specific CaCO3 deposition decreases from 127.3g/t feed water in the first stage to 100.1g/t in the last stage. © 2010 The Korean Society of Industrial and Engineering Chemistry. Source

Rababa K.S.,Tafila Technical University
European Journal of Scientific Research | Year: 2011

The blade number of impeller is an important design parameter of pumps, which affects the characteristics of pump heavily. At present, the investigation focuses mostly on the performance characteristics of axis flow pumps, the influence of blade number on inner flow filed and characteristics of centrifugal pump has not been understood completely. Therefore, the experimental verification is used to investigate the effects of blade number on flow field and characteristics of a centrifugal pump. Three models of impellers were used with 2, 3 and 4 blades. Two of these models having 3 blades with additional short blades and the third model also having 3 blades but with an increment in blade thickness of outlet part (channel form). The geometrical profile of impeller blades was identical, all bench studies and experiments were carried out at the same withdrawal pump (same volute casing). These experiments were done on water pump in the closed hydraulic laboratory in a hydraulic bench tests. The inner flow fields and characteristics of the centrifugal pump with different blade number and shape are simulated and, the comparison between prediction values and experimental results indicates that the prediction results are satisfied. From experimental results it is evident that with increasing of blade number, the optimal pump discharge shifts to the right, and increases pump pressure head H and efficiency η. For impeller with additional short blades between the main blades H increased by 1M (4%), and η by (1%), it should be noted that the length of the additional short blades by 1/3 or 2/3 of the main blade length, had no effect on the characteristic curve H-Q . © EuroJournals Publishing, Inc. 2011. Source

Al-Momani L.A.,Tafila Technical University
Arkivoc | Year: 2012

The hydroxyprolines (Hyps) 2-6 are tested as organocatalysts for aldol, Michael additions, and Mannich reactions. The results are compared with the well-known analogous L-proline (1).The effect of the additional hydroxyl group and chiral center was investigated in the three types of reactions. Catalyst 2 shows an enhancement in the stereoselectivity of the aldol reaction, while 3 in Michael addition and 5 in Mannich reaction give the best results. Derivatives of hydroxyprolines show diversity in the catalytic behavior like 6. © ARKAT-USA, Inc. Source

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