Question-and-Answer Resource for the Building Energy Modeling Community
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Hi @hema,
Again, your task: "I have to select 3 cities for daylight performance", seems arbitrary. You have a daylight device you'd like to test, apparently for performance across India. It's been stated here that simply changing latitude is not the whole story. Neal was suggesting targeting population centers across the country; Joe and I both suggested that in addition to the change in inclination, other factors affect the climate and in turn the solar availability, and in turn the performance of your device.
The beauty of climate-based simulation is that you can see how local climate affects the performance of one or more changes to a design, and you can do it relatively rapidly. In your case especially, where you wish to deploy the same device on a given building type(s), it's a matter of changing the climate file, maybe some constructions and schedules, and re-running the analysis, per building type. This is easy to do with most of the tools we talk about here every day.
So, again, the best suggestions are to spread your analysis locations around latitudinally, but also look at the climate files (with the visualization tool of your choice) and other tools like the ones Neal already posted, to try and bound the problem as best you can. I would definitely suggest simulating the device in more than three cities, as well.
