id	summary	reporter	owner	description	type	status	priority	component	version	resolution	keywords	cc
1020	DHW Plant Loop Volume / Water Use Connections Hot Water Temperature (Energy Plus)	ewilson		"In EnergyPlus, the DHW Loop's Plant Loop Volume is currently ""autocalculated"". This gives it too much capacitance. With a 60 min timestep, it takes months for the supply temperature to decay (see attached). This impacts the energy used for hot water as well as the hot/cold mixing flow rates. The problem is only noticeable for larger deadbands (> 2C). When the simulation year is split up for multiple processors, the problem is made worse (see attached). Changing the Plant Loop Volume from ‘autocalculate’ to 1 m3 or similar fixes the problem (see attached).

Therefore, I propose changing the Plant Loop Volume from ‘autocalculate’ to 1 m!^3 or similar."	Task	closed	low	Modeling	1.2	duplicate	energyplus, capacitance, DHW, plant loop