کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8071345 1521393 2018 48 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental research on the pull-down performance of an ejector enhanced auto-cascade refrigeration system for low-temperature freezer
ترجمه فارسی عنوان
تحقیقات تجربی بر روی عملکرد پایین کشیدن یک سیستم انجماد خودکار، برای سیستم یخچال و فریزر کم دما
کلمات کلیدی
تحقیقات تجربی، انژکتور خودکار آبشار آبگرم عملکرد پایین کشیدن، فریزر کم دما،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی (عمومی)
چکیده انگلیسی
This paper presents an experimental investigation on pull-down performance of an ejector enhanced auto-cascade refrigeration cycle for low-temperature freezer application. The pull-down performances of the freezer established on the ejector enhanced cycle and conventional auto-cascade refrigeration cycle were compared. Additionally, operation behaviors of the ejector and the new cycle based freezer at different mixture concentrations and throttle valve openings were investigated. The results indicated that ejector enhanced system exhibited shorter pull-down time and lower freezer air temperature after continuous operation in comparison with the conventional system. And the pull-down time was saved by 34.4% and the energy consumption of the compressor was reduced by 29.6% at the desired freezing temperature of −40 °C.The largest time average values of the pressure lift ratio and entrainment ratio reached up to 2.854 and 1.340, and the time average compression ratio of the compressor was reduced by 11.6% due to the effective pressure lifting effect of the ejector. The optimal mass fraction ratio of 30%/70% for the mixture R23/R134a was proposed with respect to the shortest pull-down time. This research may offer good guidelines for further improving the performance of the auto-cascade refrigeration system in low-temperature freezer.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy - Volume 157, 15 August 2018, Pages 647-657
نویسندگان
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