| 摘要 |
<p>A device, such as a heat meter for measurements of hot tap water energy usage, separated from building heating energy usage, in a district heating substation. The device is connected only to sensors attached to the supply pipe and return pipe of the district heating substation. A device, such as a heat meter, has a detector to detect a deviation in the total power (P) usage in the district heating substation which deviation depends on the use of warm tap water.</p> |
