Toprak Kaynaklı Isı Pompasıyla Çalışan Yerden Isıtma/Serinletme Sisteminin VRF Sistemi İle Enerji Kıyaslaması

Artan dünya nüfusu ve teknolojik gelişmelerle birlikte, insanların kapalı ortamlarda vakit geçirme sürelerinin artması, iklimlendirme sistemlerine olan ihtiyaçları da beraberinde getirmiştir. Bununla birlikte kaynakların tükenme hızının artması sonucu enerjiyi verimli kullanma ve yenilenebilir enerji kaynaklarına yönelme arayışı başlamıştır. Bu arayış içindeyken enerjinin en çok tüketildiği sektörlerden biri olan iklimlendirme sektörü için de yeni çözümler geliştirilmektedir. Bu çalışmada örnek bir binada uygulama yapılmış ve toprak kaynaklı ısı pompasına bağlı olan yerden ısıtma/serinletme sistemi, VRF (Variable Refrigerant Flow) sistemi ile karşılaştırılmıştır. İstanbul’da bulunan binanın ısı kazancı ve ısı kaybı hesapları yapılarak projelendirilmiş, sistemlerin harcadıkları enerji miktarları karşılaştırılmıştır. Elde edilen sonuçlara göre toprak kaynaklı ısı pompası ile çalışan yerden ısıtma/serinletme sisteminin daha az enerji sarf ettiği görülmüştür.

Energy Comparison of Floor Heating/Cooling System Working With Ground Source Heat Pump and VRF System

With the increasing world population and technological developments, the increase in the amount of time people spend in closed environments has brought the need for air conditioning systems. However, as a result of the increase in the depletion rate of resources, the search for efficient use of energy and orientation to renewable energy sources has begun. In this pursuit, new solutions are being developed for the air conditioning sector, which is one of the sectors where energy is consumed the most. In this study, an application was made in a sample building and the floor heating/cooling system connected to the ground source heat pump was compared with the VRF (Variable Refrigerant Flow) system. The heat gain and heat loss calculations of the building in Istanbul were made and the project was designed, and the amount of energy consumed by the systems was compared. According to the results obtained, it has been observed that the underfloor heating/cooling system operating with a ground source heat pump consumes less energy.

PDF

___

[1] ASHRAE, ASHRAE Pocket Guide for Air Conditioning, Heating, Venitlation, Refrigeration. 219-238, 2017.
[2] Bojić, M., Cvetković, D., & Bojić, L., Decreasing Energy Use and Influence to Environment by Radiant Panel Heating Using Different Energy Sources. Applied Energy, 138, 404-413, 2015.
[3] Doğan, V. & Çalışır O., Döşemden (Yerden) Isıtma Sistemlerinde Hesap Yöntemi, 2012.
[4] Gao, S., Li, Y., Zhao, M., Wang, Y., Yang, X., Yang, C., & Jin, L., Design Method of Radiant Cooling Area Based on the Relationship Between Human Thermal Comfort and Thermal Balance, Energy Procedia, 143, 100-105, 2017.
[5] Kalmár, F., Impact of Elevated Air Velocity on Subjective Thermal Comfort Sensation Under Asymmetric Radiation and Variable Airflow Direction, Journal of Building Physics, 42(2), 173-193, 2018.
[6] Kitagawa, K., Komoda, N., Hayano, H., & Tanabe, S. I., Effect of Humidity and Small Air Movement on thermal Comfort Under a Radiant Cooling Ceiling by Subjective Experiments, Energy and Buildings, 30(2), 185-193, 1999.
[7] Košir, M., Krainer, A., Dovjak, M., Perdan, R., & Kristl, Ž., Alternative to the Conventional Heating and Cooling Systems in Public Buildings, Journal of Mechanical Engineering, 56(9), 575-583, 2010.
[8] Lubis, L. I., Kanoglu, M., Dincer, I., & Rosen, M. A., Thermodynamic Analysis of a Hybrid Geothermal Heat Pump System, Geothermics, 40(3), 233-238, 2011.
[9] Omer, A. M., Ground-Source Heat Pumps Systems and Applications, Renewable and Sustainable Energy Reviews, 12(2), 344-371, 2008.
[10] Stetiu, C., Energy and Peak Power Savings Potential of Radiant Cooling Systems in US Commercial Buildings, Energy and buildings, 30(2), 127-138, 1999.
[11] Tang, H., Liu, X. H., & Jiang, Y., Theoretical and Experimental Study of Condensation Rates on Radiant Cooling Surfaces in Humid Air, Building and Environment, 97, 1-10, 2016.
[12] Türk Standartları Enstitüsü, TS 825 Binalarda Isı Yalıtımı Kuralları, 2013.
[13] Zarrella, A., De Carli, M., & Peretti, C., Radiant Floor Cooling Coupled with Dehumidification Systems in Residential Buildings: A Simulation-Based Analysis, Energy Conversion and Management, 85, 254-263, 2014.
[14] Zhang, L. Z., & Niu, J. L., Indoor Humidity Behaviors Associated With Decoupled Cooling in Hot and Humid Climates, Building and Environment, 38(1), 99-107, 2003.
[15] Zhou, X., Liu, Y., Luo, M., Zhang, L., Zhang, Q., & Zhang, X., Thermal Comfort Under Radiant Asymmetries of Floor Cooling System in 2 h and 8 h Exposure Durations, Energy and Buildings, 188, 98-110, 2019.
[16] Al-Rabghi, O. M. & Al-Johani, K. M., Utilizing Transfer Function Method For Hourly Cooling Load Calculations, Energy Conversation Managment, 319-332, 1996