کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6734005 504061 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Theoretical analysis on ground source heat pump and air source heat pump systems by the concepts of cool and warm exergy
ترجمه فارسی عنوان
تجزیه و تحلیل تئوری پمپ حرارتی منبع پمپ و سیستم های پمپ گرمای هوا توسط مفاهیم اگزرژی سرد و گرم
کلمات کلیدی
اگزرژی سرد اگزرژی گرم، پمپ حرارتی منبع زمین، پمپ حرارت منبع هوا، راندمان اگزرژی،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
This study presents exergetic characteristics of both ground source heat pump systems (GSHPs) and air source heat pump systems (ASHPs) based on the concepts of “cool exergy” and “warm exergy”. Quantitative example followed by theoretical analysis shows that GSHPs consume less exergy than ASHPs do. This is because firstly “cool exergy” is obtained from the ground in GSHPs, whereas no “cool exergy” is extracted from the environment by the ASHPs. Secondly, temperature difference between refrigerant via cooling water and ground in GSHPs is smaller than that between refrigerant and air in ASHPs. In the GSHP, cool exergy flows into the cooling water from the ground and then enters the indoor air through the refrigerant cycle. In the ASHP, the refrigerant cycle separates the electricity input of the compressor into “cool exergy” and “warm exergy.” The “cool exergy” enters the indoor air and the “warm exergy” is exhausted to the ambient environment. The analysis also shows that compressor requires largest exergy input among the total exergy inputs, and the exergy consumption in the refrigerant cycle is the highest. Thus, the improvement of the compressor performance to reduce its electricity consumption was confirmed to be of vital in minimizing unnecessary exergy consumption.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy and Buildings - Volume 75, June 2014, Pages 447-455
نویسندگان
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