الصفحات

Alexandria Engineeing Libraries

بحث هذه المدونة الإلكترونية

شرح طريقة تحميل الامتحانات من المدونة

الأربعاء، 6 أغسطس، 2014

Renewable Energy Utilization in Air Conditioning System.

Title: Renewable Energy Utilization in Air Conditioning System.

Author        : Shimaa Mohamed Abd El-Wahed Ismail
Collection   : M.Sc. Mechanical
Abstract:
Desiccants can be a part of a sustainable approach to maintaining healthy and comfortable indoor environments. It is a unique technique in that it can dry the air without precooling [he air below its dew point. Removed latent load can be double the removed sensible load. Once the desiccant is saturated with water, heat is required to regenerate it to its ”initial” state.
A Comparison between existing solid- and liquid-desiccant systems and low-flow liquid desiccant has been done. Low-flow liquid desiccant technology is more compact; it has significantly lower pressure drops and does not ”dump” heat back onto the building’s central air conditioner.
A liquid desiccant air handling machine is thermally modeled. A model is developed in TRNSYS to predict the performance of the solar LDAC. System performance is evaluated for hot water temperature range between 70 to 100 O( and seen the results on required heating water flow rate, cooling water flow rate , LiCl solution flow rate and thermal C.O.P.
A mathematical model has been designed according to case study. One parameter has been changed to see the effect on the others parameters.
Also a relation between the required heating water flow rate and temperature to regenerate the weak solution and the area of the flat plate collector is studied.
The results showed that is required approximately 0.8589 m3/hr LiCI inlet the conditioner at 42 concentration, and outlet at 38 concentration with flow rate equal to 0.9494 m3/hr 11224 Kg/hr cooling water at inlet and outlet temperature 29 O( and 35°(, 6200 Kg/hr hot water for regenerator at inlet temperature 88 O( and outlet temperature at -7 O( ,by using TRNSYS program to obtain this temperature, a 300m2 flat plate will be used.

ليست هناك تعليقات:

إرسال تعليق