Abstract
The current design weather data used for heating, ventilation, and air conditioning (HVAC) design in Japan was created using an old data period. New design weather data should be created to reflect recent local climate change. Based on our previous proposal of creating design weather data with two weather indices (dry-bulb temperature and enthalpy) for HVAC design, design weather data for Osaka was created using more recently-measured weather data (period: 2001~2015) from the Japan Meteorological Agency (JMA) in this study. The effect of recent climate change on the design weather data created with eight proposed methods was found. It showed the change in weather elements for cooling design clearly trends to warmer and drier weather, with more solar radiation and lower enthalpy, while the trends in heating design are less clear, mainly showing higher enthalpy. Furthermore, the difference in the peak load for the heating and cooling designs using the new and old design weather data was compared. The comparison showed that the minimum difference in peak load for the heating design was found using the mean daily dry-bulb temperature as the first and second indices; for the cooling design, the minimum difference in peak load was found using mean daily enthalpy as both the first and second indices.
Highlights
The peak outdoor air loads for the heating and cooling designs calculated using the old and new design hourly weather data are shown in Figures 6 and 7, respectively
The difference of peak outdoor air loads—which is directly related to the building thermal loads and the HVAC equipment capacity—were compared using the old and new design hourly weather data for eight methods
Comparing the change in CFD for the four main weather elements, including dry-bulb temperature, absolute humidity, enthalpy and horizontal global solar radiation between the old (1981–2000) and new (2001–2015) periods, showed that the change in the weather elements was larger in magnitude and variance in the cooling period than in the heating period, especially for hourly enthalpy and daily accumulative horizontal global solar radiation
Summary
Global climate change and urban heat island (UHI) intensification are making cities hotter places to live [1,2]. Climate change is expected to have noticeable effects, such as a rise in average temperatures, changes in precipitation amounts and seasonal patterns, changes in the intensity and pattern of extreme weather events, and sea level rise [3]. Some of these effects have implications for energy production and use, i.e., a rise in outdoor air temperature can be expected to increase energy requirements for cooling and to reduce the energy requirements for heating. UHIs are most noticeable during the summer, and are expected to increase the energy use of buildings for cooling
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
