Solar plant updates #246
Solar plant updates #246
Conversation
| """Estimated Total Module Area [m2]""" | ||
| if self.approx_nominal_efficiency == 0: | ||
| raise ValueError("approx_nominal_efficiency cannot be zero.") | ||
| return self._system_model.SystemDesign.system_capacity / self.approx_nominal_efficiency |
There was a problem hiding this comment.
I don't understand why the area is the system capacity divided by an efficiency? Shouldn't it be a kw per m2 value?
There was a problem hiding this comment.
I agree the units don't make sense, which is what I had messaged you about via Teams. This is based on an estimate in the SAM GUI for pvwatts8, we talked about getting a more specific area calculation for each module type in the future but thought this would be alright in the mean time.
There was a problem hiding this comment.
Could you use 11.092 kg/m2 as the default value, taken from the SAM Transient Thermal Model? There's even a reference if you need to explain it:
Prilliman, M.; Stein, J. S.; Riley, D.; Tamizhmani, G. (2020). Transient Weighted Moving-Average Model of Photovoltaic Module Back-Surface Temperature. IEEE Journal of Photovoltaics. 8 pp. Volume 10 No. 4.
There was a problem hiding this comment.
I updated the mass calculation in 66d87e6 to use 11.092kg/m2.
Are you interested in me updating the area calculation to a different method?
There was a problem hiding this comment.
Oh yes, area! There's a file pv_module.py in HOPP that contains the PVWatts default module that has module_width and module_height and module_power so you could use that to set up the multiplier
There was a problem hiding this comment.
Updated to use get_module_attribs to get PVWatts module_area and module_power in 721f11b
2 participants
capacity_factorscalculation inHybridSimulationto ac capacity factor by multiplying system capacity by inverter loading ratio to get kWh (ac) / kW (ac)dc_ac_ratioPVPlantcapacity_factorto ac capacity factor calculation compatible with PySAM v3.0.0plant_areapropertyplant_massproperty