8/13/2019 003 Solar Case Study Communal Heating DArcy House

http://slidepdf.com/reader/full/003-solar-case-study-communal-heating-darcy-house 1/2

ExtraCare, Hanover

Hanover specialises in the design,development and management ofhousing for older people.

An ExtraCare development of 52dwellings at Darcy House in Barkingand Dagenham was chosen as ashowcase for environmentallysustainable building technologies witha target BREEAM rating of VeryGood.

“ISG Jackson has been pleased to work in partnershipover a number of years with both Viridian and HanoverHousing Association, to develop together the optimumsystem for solar heating for ExtraCare estates. Theresidents of Darcy House will benefit from this innovativenew solar panel .”

Ian Vince MCIOB,Pre-Construction Manager, ISG Jackson

Dagenham

DesignViridian Solar used computer modelling to help the designteam to select an appropriate size for the solar water heating

system based on realistic estimates of hot water demand,renewable energy targets and value for money.

Site Layout. Two storey block with 36 flats and16 bungalows.

Support frames in position ready for solar panels

Site location

Clearline solar panels were craned to roof level

Solar water heating follows alaw of diminishing returns,with each square meter ofsolar panel providing lessenergy each year than theone before. The computersimulation enabled thedesign team to select themost cost effective size for the solar installation on the

ExtraCare block.

Communal heating system

Flat roof with framemounting panels

78 m 2

31,000 kWh/year

6.75 tonnes/year

carbon dioxide avoided

energy saving roof type

installed area

62 kW

peak output

system

003

Viridian Solarwww.viridiansolar.co.ukTel 01763 853 007

8/13/2019 003 Solar Case Study Communal Heating DArcy House

http://slidepdf.com/reader/full/003-solar-case-study-communal-heating-darcy-house 2/2

Installation on green roof

Heating SystemHot water for the ExtraCare block was to be provided by a communal heating system in a groundfloor plant room. Two 800 litre cylinders, heated by gas boilers feed a circulating hot water loopfrom which the flats draw hot water. The solar loop transfers heat from the 26 solar panelsmounted on the roof and indirectly heats three 1,000 litre cylinders (the solar buffer).

Viridian Solarwww.viridiansolar.co.ukTel 01763 853 007

Installed array of 78 sq. metres

Elevation of ExtraCare Block

Rsl and developer

main contractor

m&e contractor

roofing contractor

m&e consultant

architect

Cold mains water is heated in the solar buffer tanks,which then feed the conventional heating system. Ifthe water from the solar buffer is hot enough, thethermostatic control on the gas fired heaters willprevent the boiler from firing. If the solar buffer is nothot enough, the boiler will fire to lift the temperature tothe set level.

Integration with theheating system