To browse Academia.edu and the wider internet faster and more securely, please take a few seconds to upgrade your browser.Information includes monthly and annual percentiles, to provide seasonally representative combinations of temperature, humidity, and solar conditions.View a list of station locations with table data in Chapter 14 View a sample station data table.
Ashrae 2009 Fundamentals Weather Data Upgrade Your BrowserAlso available are joint frequency matrices of dry-bulb temperature and time of day (also known as temperature bin data) and additional information, such as time zones of the stations and the months and years that were used for station design condition calculations. Weather Data Viewer also provides calculators to implement various calculation methods found in the Handbook, such as those for return period minimummaximum temperatures, degree-days to any base, design day temperature, clear sky solar radiation, and load calculation data, as well as a bin data generator. Data and tables have been completely revised for the 2013 edition. An additional Extremely Hot Climate Zone 0 with humid (0A) and dry (0B) zones has been added, and the standard includes climatic data for 5564 locations throughout the world (from ASHRAE Research Project RP-1453, as published in the 2009 ASHRAE Handbook--Fundamentals ). Standard 169 also includes statistical data, such as mean temperatures; daily ranges; degree hours; and seasonal percentages within ranges of temperatures. References given in the reference section for this model include Watanabe, Urano and Hayashi(1983) and Zhang and Huang (2002). In EnergyPlus, both external (i.e, weather files supplied from others) and internal (i.e., solar position, design day temperaturehumiditysolar profiles) data is used during simulations. Solar position modeling is discussed in more detail in both the Sky Radiance and Shading Calculation sections that directly follow this section. Weather file excerpts such as might be used in sizing calculations also have this breadth of data. The input object SizingPeriod:DesignDay describes design days (meant to mimic ASHRAE design conditions but in a whole day profile) using certain characteristics for the day and then EnergyPlus supplies the remaining portions to complete outdoor conditions needed for program execution. With the first of these, one specifies a set of weather file days similar to a RunPeriod (but will be used for the Sizing calculations). In the second, the extreme or typical conditions that are calculated for the weather file during processing can be used by name. Of course, either of these can be used as a measure of usage over small periods. Design data based on dry-bulb temperature represent peak occurrences of the sensible component of ambient outdoor conditions. Design values based on wet-bulb temperature are related to the enthalpy of the outdoor air. Conditions based on dewpoint relate to the peaks of the humidity ratio. The designer, engineer, or other user must decide which set(s) of conditions and probability of occurrence apply to the design situation under consideration. Ashrae 2009 Fundamentals Weather Data Full 24 HourAs these two temperatures are insufficient to represent a full 24 hour period, the program uses a range multiplier profile to represent the full days temperatures. Note that EnergyPlus does not shift the profile based on the time of solar noon as is optionally allowed by ASHRAE procedures. The ASHRAE clear sky model described in ASHRAE HOF 2005 Chapter 31 can be used to estimate hourly clear-day solar radiation for any month of the year in U.S. EnergyPlus calculations extend the clear sky application to both northern and southern hemispheres. Note that the Clear Sky model has been updated in the ASHRAE HOF 2009 (see ASHRAE Revised Clear Sky Model below). Equation eq:DirectNormalIrradiation does not give the maximum value of direct normal irradiation that can occur in each month but yields values that are representative of conditions on cloudless days for a relatively dry and clear atmosphere. For very clear atmospheres, direct normal irradiation can be 15 higher than indicated by Equation eq:DirectNormalIrradiation, using values of A and B in Table table:extraterrestrial-solar-irradiance-and-related below. These values are tabulated by month for all 5564 locations in the ASHRAE design data that accompanies the 2009 HOF. They embody the dependence of clear sky solar radiation upon local conditions, such as elevation, precipitable water content, and aerosols. If solar model indicator selected is ASHRAETau, then the b and d values and the empirical equations coefficients should be based on the 2009 ASHRAE HOF as shown below. In particular, diffuse irradiance values are more realistic.
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