|
|
| 11. |
Effect of Some Turkish Vegetable Oil-Diesel Fuel Blends on Exhaust Emissions |
| |
Energy Sources,
Volume 19,
Issue 8,
1997,
Page 879-885
METİN ERGENEMAN,
TURGUT ÖZAKTAŞ,
K. BARIŞ CIĞIZOĞLU,
FİLİZ KARAOSMANOĞLU,
ERTUĞRUL ARSLAN,
Preview
|
PDF (116KB)
|
|
摘要:
For different types of vegetable oils of Turkish origin (sunflower, com, soybean, and olive oil) were blended with grade No. 2-D diesel fuel at a ratio of 20/80 (v/v). The effect of the compression ratio on exhaust emissions is investigated in an American Society for Testing and Materials (ASTM)-cooperative fuel research (CFR) engine working with the mentioned fuel blends and a baseline diesel fuel. A decrease in soot, CO, CO2, and HC emissions and an increase in NOxemissions have been observed for fuel blends compared to diesel fuel.
ISSN:0090-8312
DOI:10.1080/00908319708908898
出版商:Taylor & Francis Group
年代:1997
数据来源: Taylor
|
| 12. |
Design of Thermodynamic Charts for Hydrocarbon Mixtures and Influence of Operating Temperatures for Solar Absorption Cooling Cycle |
| |
Energy Sources,
Volume 19,
Issue 8,
1997,
Page 887-900
MOHAMED ABDELWAHAB EISSA,
Preview
|
PDF (193KB)
|
|
摘要:
A complete study is developed for hydrocarbon mixtures to determine their suitability as working fluids for solar absorption cooling systems. The results show that the most suitable one is composed of 50% by mole n-butane and 50% by mole h-heptane. This mixture can be used at generation temperatures t between 55°C and 65°C with a maximum working pressure of 2.722 atm. The results indicate that the highest coefficient of performance (COP) is 0.557 at tg= 60°C with cooling temperatures in the range 8–12°C. By using distillation calculations of the ideal system and the equilibrium relations concept of vapor-liquid systems, the enthalpy-concentration (H − X) and temperature-concentration (T − X) thermodynamic charts for the mixture are illustrated, sailing time and effort for those making thermodynamic calculations. The influences of the various cycle temperatures on the COP and on the circulation ratio for this mixture have been performed. It is found that there is a minimum generation temperature above which operation of the cycle is possible, which is called the cut-in/cut-off temperature. Also, it is found that there is an optimum generation temperature at which a maximum value of COP is obtained. Lowering the condensing/absorbing temperature will lower both the minimum and optimum generating temperature and circulation ratio, which tends to reduce the required solar energy for heating the generator in addition to decreasing the pumping power. The effect of increasing the evaporator temperature has the same effect as lowering the condensing/absorbing temperature.
ISSN:0090-8312
DOI:10.1080/00908319708908899
出版商:Taylor & Francis Group
年代:1997
数据来源: Taylor
|
|
首页
