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components are fixed. Flexible tubing was installed at the inlet and outlet of the pump to allow the static head at the inlet of the pump to be varied. Piping losses were considered and appropriate pipe diameter selected to ensure the losses were negligible. 4.5.3 Instrumentation Temperature, pressure and flow rate data is collected throughout the system to allow the user to operate the system and reach a steady state at the desired operating conditions. A CompacDAQ is used for data acquisition and allows the system performance to be evaluated. Currently the system will need to be controlled by the user, but as the system dynamics are understood better PID control will be implemented. 5. CONSTRUCTION Construction of the system was completed throughout the year and the system is now ready for testing. The majority of the components selected were readily available which reduced the fabrication time frame. Extra care was taken throughout the construction and assembly processes to ensure there were no leaks in the system, thus preventing loss of refrigerant. Figure 14 - ORC-B ready for testing 6. SUMMARY This paper presents the design process required for the development of a small scale ORC test bed as well as the required component selection considerations. All system components were selected, fabricated and assembled ready for the system to be charged and tested. 7. FUTURE WORK The immediate future work on this system is to charge the system with the HFC-M1 refrigerant. Once this is complete the system will be extensively tested to allow research into the system behavior. The performance of the unit will then be analyzed and any necessary changes implemented. A custom made radial turbine will be tested within the system. Once all required testing is complete the system will be used to optimize control methods and test different working fluids at a small, manageable scale. This will aid system design as it will allow refrigerant performance to be tested and control systems to be developed to control the dynamic behavior of the ORC-B system. ACKNOWLEDGEMENTS This work was supported by the New Zealand Heavy Engineering Research Association funded by the Ministry for Science and Innovation. The authors would like to thank the on-going support and mentoring from Ben Friskney at Page Macrae as well as the staff at the University of Canterbury. The authors would also like to specially acknowledge the ORC Final Year Project team for their on- going work developing the system: Ariff Ghazali, Michael Bush, Christopher Mills and Nathan Marks. REFERENCES Chen, H., Goswami, D. Y., & Stefanakos, E. K. (2010). A review of thermodynamic cycles and working fluids for the conversion of low-grade heat. Renewable and Sustainable Energy Reviews, 14(9), 3059-3067. Corporation, C. T. (2002). Capstone MicroTurbine User's Manual Macián, V., Serrano, J. R., Dolz, V., & Sánchez, J. (2013). Methodology to design a bottoming Rankine cycle, as a waste energy recovering system in vehicles. Study in a HDD engine. Applied Energy, 104(0), 758-771. doi: http://dx.doi.org/10.1016/j.apenergy.2012.11.075 Orosz, M., Mueller, A., Quoilin, S., & Hemond, H. (2009). Small Scale Solar ORC system for distributed power. Proc. of the SolarPaces Conference. Quoilin, S., Lemort, V., & Lebrun, J. (2010). Experimental study and modeling of an Organic Rankine Cycle using scroll expander. Applied Energy, 87(4), 1260- 1268. doi: 10.1016/j.apenergy.2009.06.026 Shah, R. K. &Sekulić, D. P. Fundamentals of heat exchanger design Wiley Online Library, 2007 Oralli, E. (2010). Conversion of a Scroll Compressor to an Expander for Organic Rankine Cycle: Modeling and Analysis. M.A.Sc. MR71355, University of Ontario Institute of Technology (Canada), Canada. 35th New Zealand Geothermal Workshop: 2013 Proceedings 17 – 20 November 2013 Rotorua, New ZealandPDF Image | DESIGN AND BUILD OF A 1 KILOWATT ORGANIC RANKINE CYCLE POWER GENERATOR
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