The P3 system includes a buffer tank heated by solar energy and process heat.

P3: Process Heat - Preheating with Buffer Tank

System Type

#	Hydraulic Connection / Components	P3	P5
1	Process heating device	x	x
2	Return mixing valve	x*	x
4	Heat distribution	x	x
5	External heat exchanger	x	x
6	Buffer tank bypass valve	x	x
7	Collector loop - Heat exchanger	x	x
8	Power station	x	x
9	Solar buffer tank	x*	x
a	Collector loop	x	x
b	Collector array	x*	x

* Collector suitable for process steam generation, for example Fresnel collector.

See image legend

x = included, o = optional