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Feasibility study of exploiting gearbox oil temperature of wind turbine for improving a heat pump water heater in cold areas

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Category: Content №2 2021

Last Updated on 29 April 2021

Published on 30 November -0001

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Authors:

Refat Mohammed Abdullah Eshaq, orcid.org/0000-0002-6448-4054, School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou, China, email: This email address is being protected from spambots. You need JavaScript enabled to view it.; Jiangsu Collaborative Innovation Center of Intelligent Mining Equipment, China University of Mining and Technology, Xuzhou, China

Eryi Hu, orcid.org/0000-0002-3932-4542, School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou, China, email: This email address is being protected from spambots. You need JavaScript enabled to view it.; Jiangsu Collaborative Innovation Center of Intelligent Mining Equipment, China University of Mining and Technology, Xuzhou, China

Ameen A. Alshaba, orcid.org/0000-0001-5732-1882, College of Engineering, Minia University, Minia, Egypt

Aiman A.M. Alsenwi, orcid.org/0000-0001-9981-2751, College of Engineering, Arab Academy for Science, Technology & Maritime Transport, Alexandria, Egypt

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2021, (2): 054 - 062

https://doi.org/10.33271/nvngu/2021-2/054

Abstract:

Purpose. Feasibility of completely dispensing with solar collectors (SCs) that are used in heat pump (HP) systems for hot water in cold areas.

Methodology. Since the temperature of gearbox oil is relatively high, lots of heat can be exploited. Therefore, the recovery of this unutilized heat from gearbox oil temperature of a wind turbine shows a promising solution in improving heat pump (HP) efficiency for hot water especially in cold environment or the district that is located in the north of our planet where the solar energy is very low. This investigation focuses on the feasibility of direct conversion of mechanical energy harvested from the wind speed into thermal energy by exploiting only the friction phenomenon inside the gearbox of the wind turbine by completely dispensing with solar collectors (SCs) that are used in combined solar assisted heat pump (SAHP) because the SCs have various problems, such as large heat loss, low efficiency, freezing and tube-burst, which may limit their applications.

Findings. Results show that the wind turbine can provide the power required for HP during the winter season due to high wind speed in Xuzhou city, Jiangsu, China particularly in January. At best, coefficient of performance (COP) may reach 4.08 without SCs, thus the suggested system ensures high COP in addition to decrease in the fuel consumption by 23.25%.

Originality. Wind power driven HPs have been suggested in many pervious papers as a sustainable measure to provide heat to a house; however, to improve COP of HP system, we suggest using a wind turbine to directly drive the HP and exploit gearbox oil temperature in an assistant heat exchanger installed after the HP evaporator for providing additional thermal energy to refrigerant R12 and cooling the gearbox oil.

Practical value. The coefficient of performance (COP) of HP has reached 4.08 without SCs, so the suggested system demonstrates high COP in addition to the reduced fuel consumption. Approximately 23.25% of energy could be saved using this novel system compared to a fuel water heater for DHW.

Keywords: wind turbine, heat pump, gearbox oil temperature, water heater, thermal energy

References.

1. Xu, Y., Ramanathan, V., & Victor, D.G. (2018). Global warming will happen faster than we think. Nature, 564(7734), 30-32.

2. Peters, G.P., Andrew, R.M., Canadell, J.G., Friedlingstein,P., Jackson, R.B., Korsbakken, J.I., & Peregon, A. (2019). Carbon dioxide emissions continue to grow amidst slowly emerging climate policies. Nature Climate Change, 10(1), 3-6. https://doi.org/10.1038/s41558-019-0659-6.

3. Hepbasli, A., & Kalinci, Y. (2009). A review of heat pump water heating systems. Renewable and Sustainable Energy Reviews, 13(6-7), 1211-1229. https://doi.org/10.1016/j.rser.2008.08.002.

4. Chaturvedi, S.K., Gagrani, V.D., & Abdel-Salam, T.M. (2014). Solar-assisted heat pump A sustainable system for low-temperature water heating applications. Energy Conversion and Management, 77, 550-557. https://doi.org/10.1016/j.enconman.2013.09.050.

5. Poppi, S., Sommerfeldt, N., Bales, C., Madani, H., & Lundqvist, P. (2018). Techno-economic review of solar heat pump systems for residential heating applications. Renewable and Sustainable Energy Reviews, 81, 22-32. https://doi.org/10.1016/j.rser.2017.07.041.

6. Banister, C.J., & Collins, M.R. (2015). Development and performance of a dual tank solar-assisted heat pump system. Applied Energy, 149, 125-132. https://doi.org/10.1016/j.apenergy.2015.03.130.

7. Sterling, S.J., & Collins, M.R. (2012). Feasibility analysis of an indirect heat pump assisted solar domestic hot water system. Applied Energy, 93, 11-17. https://doi.org/10.1016/j.apenergy.2011.05.050.

8. Mohanraj, M., Belyayev, Y., Jayaraj, S., & Kaltayev, A. (2018). Research and developments on solar assisted compression heat pump systems A comprehensive review (Part A: Modeling and modifications). Renewable and Sustainable Energy Reviews, 83, 90-123. https://doi.org/10.1016/j.rser.2017.08.022.

9. Myrzakhmetov, B., Sultabayev, A., & Toktamissova, S. (2020). Substantiation of the methodology for modeling and calculating the optimal operating modes of a tandem pumping installation when mining uranium. Mining of Mineral Deposits, 14(4), 59-65. https://doi.org/10.33271/mining14.04.059.

10. Yokoyama, R., Wakui, T., Kamakari, J., & Takemura, K. (2010). Performance analysis of a CO₂ heat pump water heating system under a daily change in a standardized demand. Energy, 35(2), 718-728. https://doi.org/10.1016/j.energy.2009.11.008.

11. Tagliafico, L.A., Scarpa, F., Tagliafico, G., & Valsuani, F. (2012). An approach to energy saving assessment of solar assisted heat pumps for swimming pool water heating. Energy and Buildings, 55, 833-840. https://doi.org/10.1016/j.enbuild.2012.10.009.

12. Li, H., Sun, L., & Zhang, Y. (2014). Performance investigation of a combined solar thermal heat pump heating system. Applied Thermal Engineering, 71(1), 460-468. https://doi.org/10.1016/j.applthermaleng.2014.07.012.

13. Kong, X., Sun, P., Li, Y., Jiang, K., & Dong, S. (2018). Experimental studies of a variable capacity direct-expansion solar-assisted heat pump water heater in autumn and winter conditions. Solar Energy, 170, 352-357. https://doi.org/10.1016/j.solener.2018.05.081.

14. Chen, W., Liang, S., Guo, Y., Cheng, K., Gui, X., & Tang,D. (2013). Investigation on the thermal performance and optimization of a heat pump water heater assisted by shower waste water. Energy and Buildings, 64, 172-181. https://doi.org/10.1016/j.enbuild.2013.04.021.

15. Dong, J., Zhang, Z., Yao, Y., Jiang, Y., & Lei, B. (2015). Experimental performance evaluation of a novel heat pump water heater assisted with shower drain water. Applied Energy, 154, 842-850. https://doi.org/10.1016/j.apenergy.2015.05.044.

16. Li, H., Campana, P.E., Tan, Y., & Yan, J. (2018). Feasibility study about using a stand-alone wind power driven heat pump for space heating. Applied Energy, 228, 1486-1498. https://doi.org/10.1016/j.apenergy.2018.06.146.

17. Stanek, W., Simla, T., & Gazda, W. (2019). Exergetic and thermo-ecological assessment of heat pump supported by electricity from renewable sources. Renewable Energy, 131, 404-412. https://doi.org/10.1016/j.renene.2018.07.084.

18. Zou, B., Dong, J., Yao, Y., & Jiang, Y. (2016). An experimental investigation on a small-sized parabolic trough solar collector for water heating in cold areas. Applied Energy, 163, 396-407. https://doi.org/10.1016/j.apenergy.2015.10.186.

19. Li, W., Zhai, P., Tian, J., & Luo, B. (2018). Thermal analysis of helical gear transmission system considering machining and installation error. International Journal of Mechanical Sciences, 149, 1-17. https://doi.org/10.1016/j.ijmecsci.2018.09.036.

20. Sequeira, C., Pacheco, A., Galego, P., & Gorbea, E. (2019). Analysis of the efficiency of wind turbine gearboxes using the temperature variable. Renewable Energy, 135, 465-472. https://doi.org/10.1016/j.renene.2018.12.040.

21. Li, S., & Dai, Y. (2015). Design and Simulation Analysis of a Small-Scale Compressed Air Energy Storage System Directly Driven by Vertical Axis Wind Turbine for Isolated Areas. Journal of Energy Engineering, 141(4), 04014032. https://doi.org/10.1061/(asce)ey.1943-7897.0000207.

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