Renewable Energy Renewable Energy Technologies in the Technologies in the

Harris Centre, Harris Centre, Harris Centre, Harris Centre, Walford CampusWalford Campus

Jon ParryJon Parry

“Tell me and I will forget, “Tell me and I will forget,

show me and I may remember, show me and I may remember, show me and I may remember, show me and I may remember, involve me and I will understand”involve me and I will understand”

Native American ProverbNative American Proverb

The Walford campus has a long tradition of The Walford campus has a long tradition of delivering education to landdelivering education to land--based industries based industries and this has always included an element of and this has always included an element of and this has always included an element of and this has always included an element of “green” practices such as composting and “green” practices such as composting and conservation, and in 1993 the installation of an conservation, and in 1993 the installation of an Anaerobic Digester on the college farm.Anaerobic Digester on the college farm.

The opportunity of a new build here allowed us The opportunity of a new build here allowed us to put renewable technologies and intelligent to put renewable technologies and intelligent design at the heart of what we do.design at the heart of what we do.

Renewable energy technologies included in the Renewable energy technologies included in the Harris Centre design areHarris Centre design are

��Wind turbineWind turbine

Ground source heat pumpGround source heat pump��Ground source heat pumpGround source heat pump

��Photo voltaic cellsPhoto voltaic cells

��Wood Chip boilerWood Chip boiler

But the building is successful because of good But the building is successful because of good design and its high level of specificationdesign and its high level of specification

Wind TurbineWind Turbine��Capital cost of £26,540, current annual output Capital cost of £26,540, current annual output 302KWh.302KWh.

��The turbine is a Proven 2.5 on a 6.5 m pole The turbine is a Proven 2.5 on a 6.5 m pole and was predicted to generate 2,500 kWh per and was predicted to generate 2,500 kWh per year year

��Current issues include the turbines location Current issues include the turbines location and heightand height

Ground Source heat pumpGround Source heat pump��Two Terra heat pumps that can each generate a heat Two Terra heat pumps that can each generate a heat output of 34 kW from a required electric input of 6.3kWoutput of 34 kW from a required electric input of 6.3kW

��There are deep bore holes (110m) and a “slinky” There are deep bore holes (110m) and a “slinky” ��There are deep bore holes (110m) and a “slinky” There are deep bore holes (110m) and a “slinky” system of pipes in a neighbouring field, the returning system of pipes in a neighbouring field, the returning liquid is a relatively constant temperature of about 15liquid is a relatively constant temperature of about 15oCoC

�� This heat is then processed in a similar way to a This heat is then processed in a similar way to a refrigerator works (in reverse) and warms the heating refrigerator works (in reverse) and warms the heating system water to about 49system water to about 49oCoC

�� This heat is then is distributed around the Harris This heat is then is distributed around the Harris centre via under floor heating.centre via under floor heating.

Photovoltaic cellsPhotovoltaic cells��Capital cost of the photovoltaic cells was Capital cost of the photovoltaic cells was £38,782. Current annual output is 2884kWh.£38,782. Current annual output is 2884kWh.

��There are 30sqm of cells predicted to produce There are 30sqm of cells predicted to produce 3200kWh3200kWh

Woodchip BoilerWoodchip Boiler��The Talbott’s Biomass wood chip boiler was The Talbott’s Biomass wood chip boiler was installed as a backup system for when additional installed as a backup system for when additional heat maybe required.heat maybe required.heat maybe required.heat maybe required.

��The boiler has only been lit twice ! The boiler has only been lit twice !

Any Questions ?Any Questions ?

Jon ParryJon Parry