Abstract
In Japan, there are four methods of calculating water supply demands for office buildings based on SHASE-S 206 and two methods based on the design standard of Ministry of Land, Infrastructure, Transport and Tourism (MLIT). However, these methods were found to produce overestimated values when applied to recent sanitary fixtures with advanced water saving features. To cope with this problem, Murakawa’s Simulation for Water Consumption (MSWC), which utilizes the Monte Carlo method to calculate water usage dynamically has been developed. In this study, we evaluated the validity of MSWC on water consumption of an office building. Actual water consumption data were collected from a six story office building. Water consumption estimates calculated by the six conventional methods and MSWC were compared with the actual measurement values. Though the calculations based on the conventional methods significantly deviated from the actual measurement values, those made by MSWC closely resembled them.
Highlights
In Japan, the design standard of Ministry of Land, Infrastructure, Transport and Tourism (MLIT) [1] and The Society of Heating, Air-Conditioning and Sanitary Engineers of Japan Standard 206 [2] have been used since the 1970s as water load calculation methods
Murakawa et al (2005) [8] developed the simulation tool Murakawa’s Simulation for Water Consumption (MSWC), which is based on the Monte-Carlo simulation, enabled to dynamically calculate various water usages in buildings by applying them to
We measured water consumption and the number of occupants in another office building, and compared and analyzed daily water consumption and instant peak flow rate in order to further examine the validity of MSWC
Summary
In Japan, the design standard of Ministry of Land, Infrastructure, Transport and Tourism (MLIT) [1] (referred to as “the Design Standard”) and The Society of Heating, Air-Conditioning and Sanitary Engineers of Japan Standard 206 [2] (referred to as “SHASE-S 206”) have been used since the 1970s as water load calculation methods. Murakawa et al (2005) [8] developed the simulation tool Murakawa’s Simulation for Water Consumption (MSWC), which is based on the Monte-Carlo simulation, enabled to dynamically calculate various water usages in buildings by applying them to. Integrated a Monte-Carlo simulated demand time series for optimized inflow rate of tanked water supply system. We measured water consumption and the number of occupants in another office building (flush valve was installed as the discharge system), and compared and analyzed daily water consumption (referred to as Qday below) and instant peak flow rate (referred to as Qmax below) in order to further examine the validity of MSWC. We correct the basic fixture unit of conventional methods based on the measurement results, compared the calculation results with the conventional methods using conventional basic fixture unit, and the results based on MSWC
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