What is bin temperature data?
Bin data are the number of hours that the ambient temperature was in each of a set of equally siz- ed intervals of ambient temperature. Bin data are also used in the estimation of heating and cooling loads for buildings.
How to get bin weather data?
It can be found at the National Climatic Data Center Bookstore. Another approach is to use a software program which allows you to create your own custom bin weather data by specifying the specific hours of the day, days of the week, and months of the year to include in the binning.
What is a weather bin?
▪ The “bin method” refers to a procedure where monthly weather data is sorted into discrete groups (bins) of weather conditions. ▪ Each bin contains the number of average hours of occurrence during a month or year of a particular range of weather condition.
What is mean coincident wet bulb temperature?
The mean coincident value is the arithmetic average of all the moisture levels which occur when the dry bulb temperature is high. However, the highest moisture values typically occur when the dry bulb temperatures are lower. High wet bulb temperature is used for sizing cooling towers and other evaporative equipment.
What is a bin hour?
‘bin hours’ (hj ) means the hours per year at which an ambient temperature occurs for each bin, as set out in Annex VIII; EurLex-2.
What is building load coefficient?
2.2 The Building Load Coefficient (BLC) The sum of the conductances (UA-values in Btu/hr-F) from the envelope components of a house and an effective conductance from infiltration produce monthly values of the building load coefficient (BLC).
What is the difference between the dry bulb and wet bulb temperature when the relative humidity is 28% and the dry bulb temperature is 0 C?
So the relative humidity is lower. In this case, however, there was NO difference between the readings of the wet bulb and the dry bulb thermometers. This means there is absolutely no room at this temperature for water to evaporate, indicating the humidity of the air is saturated, or full.
What does ashrae 0.4 mean?
Summer Design conditions are given as DB Temp and Mean Coincident WB Temp. 0.4% Summer Design DB and coincident WB Temps mean that the summer temperatures in a typical year for that location will exceed this design value about 0.4% of the time. ASHRAE also lists 2% and 5% design conditions.
How do I calculate room cooling load?
Calculating a Home’s Cooling Load
- Determine the dimensions of the room or home that needs cooling. For a room, you can do this with a measuring tape.
- For a room, multiply its length by its width to get the square footage.
- Multiply the square footage by 20. This is the measure of the BTU cooling load of the space.
How are bins used to calculate weather data?
The Bin Method The “bin method” refers to a procedure where monthly weather data is sorted into discrete groups (bins) of weather conditions. Each bin contains the number of average hours of occurrence during a month or year of a particular range of weather condition.
Are there blanks in the temperature bins?
If you look closely at the data I started out with in the .pdf file, you will notice that for the last five temperature bins (starting with the 85/89 bin and ending with the 105/109 bin) there are blank values in the cell for the hour range of 01 to 08.
Are there any drawbacks to the Bin Method?
A drawback for Bin Method is that it assumes that all hours in each bin have the same “mean coincident” conditions. Additionally, because the average dry bulb values are used for calculations purposes, the extreme high and low conditions may be excluded from your calculations.
How is the bin method used in engineering?
Think of it similar to a macro analysis method, advantages for early design purposes. BIN METHOD Bin Method is developed from historical weather data for a particular location. Calculations may be performed using weather bins, which are created by recording all hourly occurrences of closely related weather…