the living rainforest sustainable greenhouses
DESCRIPTION
The Living Rainforest Sustainable Greenhouses. Gerard Bot 1 , Karl Hansen 2 , Andrew Logan 2 , Henk Witte 3 and Feije de Zwart 1 1 Wageningen UR Greenhouse Horticulture 2 The Living Rainforest, Hampstead Norris, UK - PowerPoint PPT PresentationTRANSCRIPT
The Living Rainforest Sustainable Greenhouses
Gerard Bot1, Karl Hansen2, Andrew Logan2, Henk Witte3 and Feije de Zwart1
1 Wageningen UR Greenhouse Horticulture 2 The Living Rainforest, Hampstead Norris, UK 3 Groenholland, Amsterdam, The Netherlands
Introduction Sustainable greenhouses Seasonal energy storage To be realised Link to production greenhouses
The Living Rainforest?
Introduction
Charity, demonstrates the ecology of the living rainforest to the general public
renovation of existing buildings: show case for sustainability demonstrate the link between ecology and sustainability
Sustainable greenhouses
Greenhouse properties for low heat demand: cover insulation
energy friendly climate control: climate settings and strategy
efficient conversion of primary energy to heat
the “engine” of the greenhouse
coverk-value (W/m2K)
single glass 5.7
Double or 1+screen 3.0
triple or 2+screen 2.3
HR++* 1.6
Vacuum glas* 1.0
0
20
40
60
80
100
0 1 2 3 4 5 6
k (W/m2K)
Rel. Econs (%)
boiler
Cover insulation and heat demand
coverk-value (W/m2K)
single glass 5.7
Double or 1+screen 3.0
triple or 2+screen 2.3
HR++* 1.6
Vacuum glas* 1.0
0
20
40
60
80
100
0 1 2 3 4 5 6
k (W/m2K)
Rel. Econs (%)
boiler
Cover insulation and heat demand
heat-demand
energy in:
boiler
heat demand energy in: work
Heat
Pump
seasonal
storage
Cover insulation and heat demand
Seasonal storage
Aquifer: 2 wells at different temperature
filling warm aquifer
emptying cold aquifer (greenhouse is cooled)
17 oC 7 oC
heat exchanger
Summer period: excess heat
Winter period
17 oC 7 oC
heat
pump
heat exchanger
emptying warm aquifer: greenhouse is heated filling cold aquifer
Seasonal storage
Aquifer: 2 wells at different temperature energy storage: specific geological conditions
Ground Source Heat Exchanger: passive storage via boreholes
not available at TLR
high
evaporatorlowcondensorhighCarnot T
TT )()(
high
lowhighpraktical T
TTc
Heat Pump:
Average GSHE fluid temperatures year 1 till 5for different strategies
emphasis onheating
balanced
emphasis oncooling
Average GSHE fluid temperature for year 1 to 25 (final stage) with emphasis on cooling the building
-5.00
0.00
5.00
10.00
15.00
20.00
JA
N
FE
B
MA
R
AP
R
MA
Y
JU
N
JU
L
AU
G
SE
P
OC
T
NO
V
DE
C
month
Flu
id t
em
pera
ture
(o
C)
Year 1
Year 2
Year 5
Year 10
Year 25
Design: number of boreholes and depth from local geology and dynamic interaction of GSHE and greenhouse for 25 y
To be realised:
Climate control: high RH desiredEnergy conversion: - GSHE + Heat Pump - wood fired boiler for back-up
Cover: TLR light is not a bottle neck: k= 1.5 – 2 Wm-2K-1
Energy system of greenhouses, offices and visitors centre integrated
TLR show case
general public: - principles applicable at home - link ecology and sustaibnability
production greenhouses: demonstrates sustainable operation visualises application bottlenecks
Thank you for your
attention