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Experimental study to improve Heat pump Coefficient of performance using solar power

دراسة تجريبية لتحسين عامل أداء المضخة الحرارية باستخدام اللاقط الشمسي

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 Publication date 2016
and research's language is العربية
 Created by Shamra Editor




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In this study، a traditional air source heat pump was modified by adding secondary evaporator within hot water tank which acted as a water heat source of the heat pump. We made the heat pump to run alternatively either using surrounding air heat or water heat gained from solar power. We have done experiments during five months starting in December of 2014 until April 2015. Temperature and pressure were measured at specific points of the cycle. Then we defined the enthalpy at each point for both cycles using EES software (which is a software to simulate thermodynamic elements)، and calculated the amounts of heat gained in the evaporator، heat charged from the condenser، compressor work، coefficient of performance ، and electrical power consumed by the compressor. Then we made a compare between the two cycles and found that the improvement ratio in of the modified cycle to the traditional cycle was 77.07%، and the reduction ratio in electrical power consumed by the compressor of the modified cycle was 33.54%.


Artificial intelligence review:
Research summary
تتناول هذه الدراسة تحسين أداء المضخة الحرارية التقليدية التي تعتمد على الهواء كمصدر حراري، وذلك من خلال إضافة مبخر ثانوي موضوع داخل خزان ماء ساخن يتم تسخينه بواسطة لاقط شمسي. تم إجراء التجارب على مدى خمسة أشهر من ديسمبر 2014 حتى أبريل 2015، حيث تم قياس درجات الحرارة والضغوط عند نقاط محددة في الدارة. استخدم الباحثون برنامج EES لمحاكاة العناصر الترموديناميكية وحساب كميات الحرارة المكتسبة والمطروحة، وعمل الضاغط، وعامل الأداء. أظهرت النتائج أن الدارة المعدلة التي تستخدم الطاقة الشمسية كمصدر حراري أظهرت تحسنًا في عامل الأداء بنسبة 77.07% مقارنة بالدارة التقليدية، كما انخفض استهلاك الطاقة الكهربائية بنسبة 33.54%.
Critical review
دراسة نقدية: تعتبر هذه الدراسة خطوة مهمة نحو تحسين كفاءة المضخات الحرارية باستخدام الطاقة الشمسية، إلا أن هناك بعض النقاط التي يمكن تحسينها. أولاً، الدراسة لم تتناول بشكل كافٍ تأثير العوامل البيئية المختلفة مثل الرياح والرطوبة على أداء النظام. ثانياً، لم يتم تقديم تحليل اقتصادي شامل لتكلفة النظام المعدل مقارنة بالنظام التقليدي، مما يجعل من الصعب تقييم الجدوى الاقتصادية للتطبيق العملي. أخيراً، كان من الممكن تحسين الدراسة من خلال إجراء تجارب على مدى فترة زمنية أطول وفي مناطق جغرافية مختلفة للحصول على نتائج أكثر شمولية.
Questions related to the research
  1. ما الهدف الرئيسي من الدراسة؟

    الهدف الرئيسي من الدراسة هو تحسين عامل أداء المضخة الحرارية من خلال استخدام الطاقة الشمسية كمصدر حراري إضافي.

  2. ما هي نسبة التحسين في عامل الأداء التي تم تحقيقها باستخدام النظام المعدل؟

    تم تحقيق نسبة تحسين في عامل الأداء بلغت 77.07% باستخدام النظام المعدل مقارنة بالنظام التقليدي.

  3. ما هي الفترة الزمنية التي أجريت فيها التجارب؟

    أجريت التجارب على مدى خمسة أشهر من ديسمبر 2014 حتى أبريل 2015.

  4. ما هو البرنامج الذي استخدم لمحاكاة العناصر الترموديناميكية في الدراسة؟

    استخدم برنامج EES لمحاكاة العناصر الترموديناميكية وحساب كميات الحرارة وعمل الضاغط وعامل الأداء.


References used
VOCALE, P.; MORINI, G. L.; SPIGA, M., Influence of outdoor air conditions on the air source heat pumps performance, ScienceDirect, Germany, Vol.3 , N.58 , 2014, 653 – 662
WANG, F.; LIANG, C. H.; YANG, M. T.; ZHANG, X. S., Preliminary study of a novel defrosting method for air source heat pumps based on super hydrophobic fin, ScienceDirect, Germany, Vol.2 , N.90 , 2015, 136-144
CARSEN, J. B; WILLIAM, R. W; MICHAEL, R. C, Validation of a single tank, multi-mode solar-assisted heat pump TRNSYS model, ScienceDirect, Germany, Vol.2 , N.45 , 2014, 499 – 504
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544  - 0  - -  Adam Mousa was published in field ( Physics)
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