Dynamic Heating System of Multiphase Flow Digester by Solar-Untreated Sewage Source Heat Pump

Table 8

Economy of the different biogas heating systems.

Index	System 1	System 2	System 3	System 4	System 5	Standard deviation
(yuan)	24000	67175.37	52548	6080	18024	25389.21
(yuan)	2572.43	7390.96	6013.93	1033.28	2313.49	2699.39