Energy and Exergy Analysis of Surface Water Source Heat Pump System

Öz

In this study, energy and exergy analyzes were carried out to heat an experimental room with 28 square meter area by a surface water source heat pump (SWSHP) in the heating season, where placed in next to a river source (Araç stream) in Karabük University. The system had a frequency inverter to change the compressor speed and the experiment was started at 35 Hz. in winter condition and completed when the indoor temperature reached 25ۥ°C. While the COP value of the system was calculated as 2.58 on average, the highest exergy destruction was determined as 0.6 kW in the compressor in terms of the exergy analysis. The average exergy destructions were determined as 0.125 kW for the condenser, 0.152 kW for the expansion valve, 0.14 kW for the evaporator and fan coil system, and 0.06 kW for the water source heat exchanger. Exergy efficiencies were 60% for the compressor, 75% for the condenser, 85% for the expansion valve, 25% for the evaporator, 63% for the fan coil system and 8% for the water source heat exchanger. As a result of the study, it has been determined that the surface water source heat pump system works successfully in Karabük province conditions.

Anahtar Kelimeler

• Water source heat pump
• surface water
• COP
• energy and exergy analysis

Proje Numarası

KBÜBAP - 11/2-DR-002

Yüzey Suyu Kaynaklı Isı Pompası Sisteminin Enerji ve Ekserji Analizi

Öz

Bu çalışmada Karabük Üniversitesi yerleşkesi içerisinde akarsu kaynağı (araç çayı) kenarına kurulan 28m2 alana sahip bir deney odasının ısıtma sezonunda yüzey suyu kaynaklı ısı pompası (YSKIP) ile ısıtılması esnasındaki enerji ve ekserji analizleri yapılmıştır. Kompresör devrini değiştirmek için frekans invertörü kullanılan sistemde deney 35 Hz. değerinde, kış şartlarında yapılmış ve iç ortam sıcaklığı 25ۥ°C ulaştığında tamamlanmıştır. Sistemin COP değeri, ortalama 2.58 hesap edilirken, yapılan ekserji analizleri sonucuna göre en yüksek ekserji yıkımı kompresörde 0.6 kW olarak tespit edilmiştir. Diğer ekipmanların ortalama ekserji yıkımları ise, kondenser için 0.125kW, genleşme valfi için 0.152 kW, evaparatör ve fancoil sistemi için 0.14 kW, su kaynağı ısı değiştiricisi için ise 0.06 kW olarak tespit edilirken. Ekserji verimleri, kompresör için %60, kondenser için %75, genleşme valfi için %85, evaparatör için %25, fancoil sistemi için %63 ve su kaynağı ısı değiştiricisi için % 8’dir. Yapılan çalışma neticesinde, yüzey suyu kaynaklı ısı pompası sisteminin Karabük ili şartlarında başarılı bir şekilde çalıştığı tespit edilmiştir.

Anahtar Kelimeler

• Su kaynaklı ısı pompası
• konik yüzey suyu
• COP
• enerji ve ekserji analizi

Destekleyen Kurum

Karabük Üniversitesi Bilimsel Araştırma Projeleri Koordinasyon Birimi

Proje Numarası

KBÜBAP - 11/2-DR-002

Teşekkür

Karabük Üniversitesi Bilimsel Araştırma Projeleri Koordinasyon Birimine çalışmamızı KBÜBAP - 11/2-DR-002 proje numarası ile destekledikleri için teşekkürlerimizi sunarız.

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