Energy for Life :

Tropical House

Duncan East

Head of Sustainability

Carbon reduction plan

• Carbon Neutral by end 2020

Zoo 57 ha

Total 103 ha

Electricity consumption, 53%

Electricity transmission, 15%

Heating fuel consumption, 17%

Heating fuel (well to tank), 3% On site Transport, 5%

Waste disposal, 5% Travel, 1%

Water, 1%

Fossil fuel heating

• Five large heat loads and four small

• Tropical house – gas oil

• Marwell Hall – gas oil

• Semi Aquatic mammals (pygmy hippo) – gas oil

• Giraffe - kerosene

• Okapi – kerosene

• World of Lemurs – gas oil

• Two cottages - kerosene

• Science and Learning - LPG

Map

Largest first – Tropical World

• Over 30,000 litres of oil per year

• 85+ tonnes CO2e per year, 5% of total

• Replace oil with biomass?

Largest first – Tropical World

• Replacing old leaky tropical house better

than trying to heat it sustainably

• Significantly better animal housing and

better guest experience

• Opportunity for energy and climate

change messaging

Low embodied carbon

• Cut and fill excavations

• no material brought on or taken off site for

landscaping

• Minimal foundations

• Lightweight frame construction

• Inflatable ETFE roof

Ground level

Efficient to run

• Well insulated so efficient to heat in winter

• Heat exchange on extract back of house

• LED lighting (excluding UV)

• Variable speed pumps

• Under floor heating in reptile area

• Full length louvers ventilate top and bottom to keep cool in summer

• Roof partly shaded to reduce peak solar gain

Water

• Rainwater capture – self sufficient?

• Four water features each with independent filtration systems

• Nitrate sumps on main aquaria

• “Rain” sprinklers once per night - cleans plants

• Drip irrigation directed where needed rest of the time

Rainwater tanks

Climate science gallery

• Exploring energy through heat

• Animal dung and detritivores

• Animals controlling their own environment

• Changing Climate

• Changing Energy

• Taking Action

Phase II

Map

Local heat loads included

• Can’t reach all heat loads in one hit so focus on those closest to tropical house site

• Hall – 20,000 litres gas oil, 55 tonnes CO2

• Okapi – 10,000 litres kerosene, 25 tonnes CO2

• Cottages 3,000 litres kerosene, 8.5 tonnes CO2

• Lemur 2,000 litres Gas oil, 5.5 tonnes CO2

Okapi,

40kW

Curators,

36kW

18kW

Lemur,

24kW

Marwell

Hal, 150kW

Thank you

Any questions?