Waste water heat recuperation in the hotel

SES Urban

Waste water heat recuperation in the hotel

The calculation is made on the basis of a consolidated analysis of the audit reports of specialized companies. The calculation takes into account the peak loads for the hotel of the tourist destination.

 

General information about the object *:

Location	Spain
Number of rooms	150
Number of people staying in the room	2
Average hotel occupancy by year	75%
Number of hotel stars	4

 

Technical information about the object *:

Hot water consumption per person	80 l
The ratio of hot water to cold	40/60
Cold water temperature	10 С
Temperature at the outlet of the boiler room	60 С
Wastewater temperature	25 С
Type of heat source	Natural gas
The cost of energy	53 EUR ****
Boiler room efficiency	90%**

 

Estimated information on annual consumption:

Volume of hot water consumption	6 132 m3
Volume of wastewater per year	15 330 m3
Total amount of energy for heating	396,12 MW*h
Current water heating costs	20 994 EUR

 

Calculation of the efficiency of the installation of the recuperation system:

Type of system	passive
Type of connection to the DHW system	Plate heat exchanger
Recuperation power	36,11 kW
Total annual recuperation	106,95 MW*h
Savings from implementation	5 668 EUR
The cost of the system	22 000 EUR***
ROI	3,88 years

 

* The calculation is based on a summary analysis of the audit reports of specialized companies. The calculation takes into account peak loads for a tourist destination hotel.

** The weighted average value for typical equipment on the market is accepted

*** The value from the experience of previous installations of similar systems is accepted

**** All financial indicators are reflected without VAT