Mitsubishi Electric CMB-WP-V-GA1 Data Book page 142

3. SYSTEM DESIGN GUIDE
b) Heat storage tank
Heat storage tank can be classified by types into the open type heat storage tank exposed to atmosphere, and the
closed type heat storage tank with structure separated from atmosphere. Although the size of the tank and its instal-
lation place should be taken into account, the closed type tank is being usually employed by considering corrosion
problems.
The capacity of heat storage tanks is determined in accordance with the daily maximum heating load that includes
warming up load to be applied for the day after the holiday.
When auxiliary heat source is operated during operation and even after stopping of water heat source HYBRID CITY MULTI unit
HQ
V =
HQ :
2T
∆T :
ƞV :
HQ : 1.3 × (ƩQ'a + ƩQ'c + ƩQ'd + ƩQ'f) T
2T
HQ
V =
HQ :
2T
∆T :
ƞV :
HQ : 1.3 × (ƩQ'a + ƩQ'c + ƩQ'd + ƩQ'f) T
2T
When auxiliary heat source is operated after stopping of water heat source HYBRID CITY MULTI unit
HQ
V =
HQ :
2T
∆T :
ƞV :
HQ : 1.3 × (ƩQ'a + ƩQ'c + ƩQ'd + ƩQ'f) T
2T
HQ
V =
HQ :
2T
∆T :
ƞV :
HQ : 1.3 × (ƩQ'a + ƩQ'c + ƩQ'd + ƩQ'f) T
2T
MEE15K052
1
( 1 - ) - 860 × Pw × T
2T
COP
h
∆T × 1,000 × ƞV
Maximum heating load including load required for the day after the holiday
Temperature difference utilized by heat storage tank
Heat storage tank efficiency
1
( 1 - ) - 3,412 × Pw × T
2T
COP
h
∆T × ƞV
Maximum heating load including load required for the day after the holiday
Temperature difference utilized by heat storage tank
Heat storage tank efficiency
1
( 1 - ) - 860 × Pw × T
2T
COP
h
∆T × 1,000 × ƞV
Maximum heating load including load required for the day after the holiday
Temperature difference utilized by heat storage tank
Heat storage tank efficiency
1
( 1 - ) - 3,412 × Pw × T
2T
COP
h
∆T × ƞV
Maximum heating load including load required for the day after the holiday
Temperature difference utilized by heat storage tank
Heat storage tank efficiency
- QH × T
2 2
(ton)
(°C)
- ψ (ƩQe2 + ƩQe3) (T2 - 1)
2
- QH × T
2 2
(Ibs)
(°F)
- ψ (ƩQe2 + ƩQe3) (T2 - 1)
2
2
(ton)
(°C)
- ψ (ƩQe2 + ƩQe3) (T2 - 1)
2
2
(Ibs)
(°F)
- ψ (ƩQe2 + ƩQe3) (T2 - 1)
2
(kcal/day)
(BTU/day)
(kcal/day)
(BTU/day)
2 - 53