A Methodology of Selection Domestic Hot Water flow Counters for Multifamily Buildings Procedia Engineering 165 ( 2016 ) 1281 – 1286 Available online at www sciencedirect com 1877 7058 © 2016 The Autho[.]
Available online at www.sciencedirect.com ScienceDirect Procedia Engineering 165 (2016) 1281 – 1286 15th International scientific conference “Underground Urbanisation as a Prerequisite for Sustainable Development” A methodology of selection domestic hot water flow counters for multifamily buildings Viktor Pukhkal a,*, Aleksandr Yeremkin b, Aleksandr Tsygankov c, Boris Moiseev d a St Petersburg State University of Architecture and Civil Engineering, 2-ya Krasnoarmejskaja str 4, St Petersburg, 190005, Russia b Penza State University of Architecture and Construction,German Titov str 28, Penza, 440028, Russia c St Petersburg National Research University of Information Technologies, Mechanics and Optics, Lomonosov str 9, St Petersburg, 191002, Russia d Tyumen industrial University, Volodarskogo str 38, Tyumen, 625000, Russia Abstract "Design regime for current water consumption" is proposed to use when performing calculations of water consumption in hot water supply systems in multi-family buildings Design regime is a simplified mathematical description of all ordered sets of time costs expected in the current period of hot water system operation The design regime of water consumption is described by the ratio of total hourly irregularity at 98% supply (security) When choosing a water flow counter in the hot water supply of multifamily buildings value of the operational water flow counter must comply with the parameters of water consumption of the building to the greatest extent The methodology is proposed and an example of calculation of the amount of water per day passing through the water flow counter when water flow is below threshold values, the smallest and the transitional costs for the flow counter is made © 2016 2016The TheAuthors Authors Published by Elsevier © Published by Elsevier Ltd Ltd This is an open access article under the CC BY-NC-ND license Peer-review under responsibility of the scientific committee of the 15th International scientific conference “Underground (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under scientific committee of the 15th International scientific conference “Underground Urbanisation as a Urbanisation as aresponsibility Prerequisite of fortheSustainable Development Prerequisite for Sustainable Development Keywords: multifamily buildings, hot water supply, a selection of domestic hot water flow counter;Introduction Introduction Water metering units with the hot water counters installation are provided for measuring the water consumption on * Corresponding author E-mail address: pva1111@rambler.ru 1877-7058 © 2016 The Authors Published by Elsevier Ltd This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the 15th International scientific conference “Underground Urbanisation as a Prerequisite for Sustainable Development doi:10.1016/j.proeng.2016.11.851 1282 Viktor Pukhkal et al / Procedia Engineering 165 (2016) 1281 – 1286 hot water supply inputs in multifamily buildings Pre-selection of the nominal diameter of tachometer water counter isproduced by the estimated daily water consumption for hot water [1] (tab.1) The principal characteristics of tachometer water counters are: m x instrument threshold Qh - the flow rate at which the rotary-disk or turbine of water counter start continuous rotation (the consumption below the threshold is not recorded by the water counter); m x minimum consumption Qmin is the consumption at which the water counter has a relative error of ±5% and below which the relative error is not metered; m x transitional consumption Qt is consumption at which the water counter has an error of ±2%, and below which an error is of ±5%; m x nominal consumption Qnom is consumption (equal to 1/2 maximum consumption) at which the counter can operate continuously for long time; m x maximum consumption Q max is the consumption at which the counter may not work more than for hour per day; m x operational consumption Qe is the consumption at which the counter can run continuously for a lifetime Table Choice of water flow meter nominal (inside) diameter Nominal (inside) diameter, mm , for water flow counters Estimated dayly water comsumption, m3 per day rotary-disk water counters turbine water counters