Chapter 3 Decision Support Model (IUWS-DSM) - Tubdok

Table 16: Matrix for calculating cost and energy consumption of CA
calculation of:
1. costs
2. energy
no. system option system size
1 Sys. Base
1.1 local source (CA)
1.2 + external source (CA)
1.3 + local source (UD)
[1] 2 Sys. +Rainwater
2.1 + roof-water (WUU)
[2] 2.2 + local source (UD)
+ surface runoff (UD)
2.3 + local source (UD)
+ surface runoff (UD)
+ roof-water (WUU)
3 Sys. +Reuse
3.1 + indirect potable (CA)
3.2 + indirect potable (UD)
[3] 3.3 + direct non-potable
(UD or WUU)
[4] 4 Sys. +Both
4.1
(2.3+
3.1/2)
4.2
(2.3+
3.3)
+ local source (UD)
+ surface runoff (UD)
+ roof-water (WUU)
+ indirect potable
(CA or UD)
+ local source (UD)
+ surface runoff (UD)
+ roof-water (WUU)
+ direct non-potable
(UD or WUU)
[m 3 /d]
abstraction &
transmission
raw water
treatment
Chapter 2 · New Conception 43
distribution
(transmission)
collection
(sewer + drain)
used water
treatment
summation
- i. ii. iii. iv. v. -
[1] the implementation of rainwater utilisation is in the inferior levels, i.e. UD and WUU. Hence, its
costs and energy consumption are evaluated in its corresponding levels.
[2]
when surface runoff is considered as local water sources, the other types of local sources are
automatically taken into account.
[3]
direct non-potable reuse either in UD or in WUU are two different options. However, since they
require the same amount of water from CA, they are considered as one case for CA.
[4]
there are more possibilities of combination. However, if such complicated options are considered, it
means that the water is very scarce, whereby only these two extreme options are involved.
Explanation: as the exemplar, the table is blank. During the calculation, two tables are generated for
system cost and energy consumption each.