b8b21b64-2b44-4baa-a988-91143a22a96a20210104091336543wseamdt@crossref.orgMDT DepositWSEAS TRANSACTIONS ON FLUID MECHANICS2224-347X1790-508710.37394/232013http://wseas.org/wseas/cms.action?id=40361420211420211610.37394/232013.2021.16https://wseas.org/wseas/cms.action?id=23282WojciechWolakDepartment Of Production Engineering, Kielce University of Technology, Al. Tysiaclecia P.P. 7, 25-314 Kielce, PolandKrzysztofDubajDepartment Of Production Engineering, Kielce University of Technology, Al. Tysiaclecia P.P. 7, 25-314 Kielce, PolandArturBartosikDepartment Of Production Engineering, Kielce University of Technology, Al. Tysiaclecia P.P. 7, 25-314 Kielce, PolandThe paper deals with nozzle valve characteristics used in modern portable device, named handy shower, dedicated for personal hygiene. Such device significantly reduces water consumption and can be easily and quickly changed into a shower, sink or bidet. Importance of such device continuously rises as some regions and cities face water shortages. The aim of the paper is to measure and analyse characteristics of nozzle valves in portable handy shower for different hight of hydrostatic pressure, different number of holes in the nozzle and different level of valve opening. Experiments required measurements of volumetric flow rate and pressure drops. The pressure drops on the nozzle valve were measured using differential pressure transducer with accuracy of 1 Pa, while the water flow rate at the outlet of the nozzle was measured using the time-volume method with accuracy for volume and time 1ml and 0.1s, respectively. Experiments confirmed substantial influence of hight of hydrostatic pressure, number of holes in the nozzle, and the level of valve opening on outlet water flow rate from the device. It is demonstrated that for chosen height of hydrostatic pressure and for filled water tank it is possible to calculate duration of the use of handy shower for specific hygiene purpose by choosing appropriate level of valve opening and the right nozzle valve with a certain number of holes. Authors discussed possible reason that some of measured points are scattered at low level of valve opening. Results of experience were presented as graphs and conclusions.14202114202117https://www.wseas.org/multimedia/journals/fluid/2021/a025113-001(2021).pdf10.37394/232013.2021.16.1https://www.wseas.org/multimedia/journals/fluid/2021/a025113-001(2021).pdf10.1016/j.envint.2013.11.019Ercin, A.E. and Hoekstra, A.Y., Water footprint scenarios for 2050: A global analysis, Environment Int., Vol. 64, 2014, pp. 71–82. Bayomi, N.N., Abdel-Maksoud, R.M., Nawar, M.A. and Heikal, H.A., Valve with variable inherent characteristics, J. of Science and Technology, Vol. 9, No. 15, 2013, pp. 39-48. Jablonksa, J. and Kozubkova, M., Flow characteristics of control valve for different strokes, European Physical J., 2016, pp. 1-5. 10.1007/978-3-540-75995-9_149Kim, S.W., Kim, J.H., Choi, Y.D., Lee, Y.H., Flow characteristics of butterfly valve by PIV and CFD, New Trends in Fluid Mechanics Research, Proc. Fifth Int. Conf. on Fluid Mechanics, Tsinghua University Press and Springer, Shanghai, 2007, pp. 463-466. 10.4028/www.scientific.net/amr.605-607.1345Xie, Y.D., Liu, Y.J., Wang, L.Y., Prediction model of control valve characteristics, Advanced Materials Research, Vol. 605-607, 2012, pp. 1345-1349. 10.4028/www.scientific.net/amr.619.107Li, W.H., Shao, W.L., Study of Flow Characteristics and Control Circuit on HighSpeed Solenoid Valve, Advanced Materials Research, Vol. 619, 2012, pp. 107-110. 10.1016/j.flowmeasinst.2019.101651Mu, Y., Liu, M., Ma, Z., Research on the measuring characteristics of a new design butterfly valve flowmeter, Flow Measurements and Instrumentation, Vol. 70, 2019, pp.1016- 1051. 10.15199/48.2019.04.18Kozlov, L.G., Polishchuk, L.K., Piontkevych, O.V., Korinenko, M.P., Horbatiuk, R.M., Komada, P., Orazalieva, S., Ussatova, O., Experimental research characteristics of counterbalance valve for hydraulic drive control system of mobile machine, Electrotechnical Inspection, No. 4, 2019, pp. 104-109. 10.17559/tv-20141128090939Herakovič N., Duhovnik J., Ši ic M., CFD simulation of flow force reduction in hydraulic valves, Tehnicki vjesnik/Technical Gazette, Vol. 22, No. 2, 2015, pp. 453-463. 10.1016/j.enconman.2013.08.021Ritelli G. F., Vacca A., Energetic and dynamic impact of counterbalance valves in fluid power machines, Energy Conversion and Management, Vol. 76, 2013, pp. 701-711. Nawar, M.A., New valve with variable inherent performance for different system characteristics, Ph.D, Mechanical Power Dept., Faculty of Eng., Mataria, Helwan University, 2010. 10.1016/j.ultras.2009.02.004Jazi, A.M. and Rahimzadeh, H., Waveform analysis of cavitation in a globe valve, Ultrasonics, Vol. 49, 2009, pp. 577-582. Morrison, F.A., An Introduction to Fluid Mechanics, Cambridge University Press, New York, 2013. Bird, R.B., Stewart, W.E., Lightfoot, E.N., Transport phenomena, New York: John Wiley & Sons, 1960. Schlichting, H., Boundary layer theory, McGraw-Hill, New York, 1968. Bartosik, A., Wojtyniak, T., The measurements of frictional losses in a slotted sieve, 18th Int. Conf. Transport and Sedimentation of Solid Particles, Prague, 2017, pp. 27-34. Bartosik, A., Wojtyniak, T., Prediction of frictional losses in slotted sieves, 19th Int. Conf. on Transport and Sedimentation of Solid Particles, Cape Town, 2019, pp. 24-27. Cebeci, T. and Smith, A.M.O., Analysis of turbulent boundary layers, Academic Press, New York-London, 1974. Cengel, Y.A. and Cimbala, J.M., Fluid Mechanics, McGraw Hill, 2006.