بررسی تأثیر زمان شروع پاشش در موتور احتراق تراکمی کنترل واکنشی بر ظرفیت بازیافت حرارت هدر رفته

نوع مقاله : مقاله پژوهشی

نویسندگان

1 صنعتی سهند-مهندسی مکانیک

2 دانشجو

3 استاد

چکیده

این موضوع قابل توجه می‌باشد که حدود یک سوم از انرژی ورودی به سیلندر یک موتور احتراق داخلی به کار مفید تبدیل می‌گردد و مابقی انرژی به روش‌های مختلفی تلف می‌شود. بنابراین ارائه راه‌حل‌هایی که بتواند بخشی از انرژی تلف شده موتور را بازیابی کند قابل توجه و مفید می‌باشد. در این مطالعه به بررسی تأثیر زمان شروع پاشش در موتور اشتعال تراکمی کنترل واکنشی بر ظرفیت حرارت هدر رفتی بازیافتی پرداخته شده است. پس از صحت‌سنجی نتایج، زمان شروع پاشش سوخت دیزل تغییر داده شده و اثرات آنها بر روی نابودی اگزرژی، ضریب بهره‌وری، توان خروجی از موتور و آلاینده‌های تولیدی مورد مطالعه قرار گرفته است. نتایج نشان دادند که با زودهنگام کردن زمان شروع پاشش سوخت پارامترهای همانند بازده قانون اول ترمودینامیک و آلاینده‌هایی از قبیل هیدروکربن‌های‌نسوخته و کربن‌مونواکسید به ترتیب افزایش و کاهش پیدا کرده‌اند. به علاوه اگزرژی حاصل از انتقال حرارت به دلیل بالا بودن انتقال حرارت در اثر بالا بودن دمای بار داخل سیلندر، افزایش یافته و همچنین بالا بودن دما باعث شده است که بازگشت‌ناپذیری به دلیل افزایش تعداد واکنش‌های شیمیایی افزایش یابد. زودهنگام کردن زمان آغاز پاشش سوخت، ضریب بهره‌وری سیستم را افزایش داده است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of Start of Injection Timing on Waste Heat Recovery Capacity in a Reactivity Controlled Compression Ignition Engine

نویسندگان [English]

  • Elahe Neshat 1
  • mehrdad nazemian 2
  • rahim khoshbakhti 3
1 صنعتی سهند-مهندسی مکانیک
2 student
3 professor
چکیده [English]

It is noteworthy that about one-third of the input energy to the cylinder of an internal combustion engine becomes useful work and the rest of the energy is lost by various factors. Therefore, providing solutions that can recover waste heat is remarkable and useful. In the current study, the effect of the start of injection timing on the reactivity controlled compression ignition engine on the waste heat recovery capacity has been investigated. After verifying the results, diesel fuel start of injection timing has been changed and their effects on exergy destruction, waste heat recovery capacity, power output and emissions have been investigated. The results showed that the advanced start of injection timing increases engine efficiency and decreases carbon monoxide and unburned hydrocarbons emissions. In addition, heat transfer exergy has increased due to the higher in cylinder temperature, and the higher temperature has led to an increase in irreversibility due to the increased number of reactions. Advanced fuel injection timing has improved utilization.

کلیدواژه‌ها [English]

  • Reactivity controlled engine
  • Compression ignition engine
  • Waste heat recovery
  • Injection timing
  • Utilization factor

مراجع

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نشریه مهندسی مکانیک امیرکبیر
دوره 53، شماره 1
فروردین 1400
صفحه 3-16

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