Two of the building blocks in the Houtvenne project are heated by individual,
multifunctional heating plants, which combines heating, subsequent heating of
domestic hot water and ventilation. The advantage of such design lies in the
waste heat utilisation. The plant uses the waste heat of the boiler for the
preheating of the ventilation air.
Illustration of system:
A =
returning heating circuit
B = start heating circuit
C = cold water input
D = to hot water tap
E = gas
F = condense disposal
G = returning air
H = air input
J = fresh air
K = disposal waste air + flue gasses
1 = outside air filter
2 = fan for fresh air
3 = fan for disposal of old air
4 = heat recovery
5 = condense disposal
6 = integrated heat exchanger
for heating and DHW
7 = burning bed
8 = circulation pump
9 = returning air filter
10 = gas input feeding block
11 = valve
12 = collection box
Exhaust air from the kitchen, bathroom and toilets is transferred via the
ductwork of the ventilation system to the condensing gas boiler. Part of this
air is used for burning the gas, whereas the remainder is transported through
the valve to the collection box. The valve controls the air supply for the
burning bed in order to ensure optimal burning of the gas. The stale air and the
exhaust flue gas goes through the heat exchanger, where it condenses and
releases its latent energy. In the heat exchanger fresh air is coming in, heated,
and distributed to the dwellings by the ventilation ductwork.
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|
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| Ventilation | Block 1 | Block 2 | Block 3 | Total |
| Technique: |
Mechanical ventilation with heat recovery |
|||
| Energy savings: | ||||
| Energy consumption (kWh/mē): | ||||
| without heat recovery | 79 | 79 | 79 | 79 |
| with heat recovery | 50 | 50 | 50 | 50 |
| Total energy consumption (kWh): | ||||
| without heat recovery | 27,729 | 97,249 | 48,980 | 173,958 |
| with heat recovery | 17,550 | 61,550 | 31,000 | 110,100 |
| Savings in naturel gas: | ||||
| Consumption (kWh) | 10,179 | 35,699 | 17,980 | 63,858 |
| Costs (BEF/year) | 11,854 | 41,573 | 20,938 | 74,365 |
| Investments (BFF): | ||||
| Surplus costs/dwelling | 55,000 | 55,000 | 55,000 | 55,000 |
| Total surplus cost | 165,000 | 660,000 | 440,000 | 1.265,000 |
| Pay back time (years): | 13,9 | 15,9 | 21,0 | 17 |
General information on the technologies:
Ventilation
and heat exchange
Condensing Gas
Boilers
EMS
Supplier of Technology:
There have been several suppliers involved in the project, yet there is just one
manufacturer of the multifunction heating plant:
J.E. StorkAir
Stork Air is a Dutch company that manufactures ventilation systems and other
equipment related to the control of indoor climate.
Postbus 621
B-8000 AP Zwolle
Phone: +32 38-42 96 911
e-mail: sales@jestorkair.nl
www.jestorkair.nl