Making your self build self sufficient with ground source heat pumps

Transcription

1 Making yur self build self sufficient with grund surce heat pumps Natinal Hme Building and Renvating Shw, March 2015 Kensa Heat Pumps

2 Our jurney Intrducing grund surce heat pumps Dmestic prject walk-thrugh RHI and yur prject Cmmercial prject walk-thrugh Kensa supprt

3 Intrducing grund surce heat pumps

4 Hw a heat pump wrks Grund surce heat pumps extract heat frm the earth using pipes buried undergrund and cnvert this int useful energy t heat yur hme.

5 Heat surces Grund prvides a highly efficient surce f heat Unaffected by air temperature Recharged by slar energy and rainfall Grund type (thermal cnductivity) needs t be factred int sizing calculatins Imprtant nt t ver extract sizing is imprtant

6 Dmestic prject walk-thrugh

7 Planning a grund surce prject Lcatin: Crnwall Cnstructin: Timber frame Huse size: 460sq/m MCS heat lsses 18kW 21kW Kensa hybrid heat pump Grund flr: Under-flr heating (UFH) (screed) 1 st flr: Radiatrs/UFH (suspended timber) Grund cllectrs: Slinkies

8 Extracting the heat frm the grund Sizing Installatin New build land 3.5x the ttal sq/m 5 x 50m slinkies fr heating and DHW 1500m f Black MDPE Buried in: trenches 1.2m wide x 1.2m deep, 5m between trench centres Ttal f 1500sq/m f land required Excavated sil can be placed between trenches, s n duble handling spil Slinkies shuld be rlled ut, cable tied and walked int trenches, pressure tested Sand lining required if rcky Slinkies shuld be rlled ut, cable tied and walked int trenches, pressure tested

9 Heating distributin system Prefer screed flr thrughut Pipe wrk installed at tighter centres Jisted flrs plated UFH system Flr cvering affects COP Use UFH design cmpany Radiatr versized 2.4 times larger at 50 C Prgrammable rm thermstats Buffer tank full cntrl Weather cmpensated as standard Future prfing

10 Dmestic Ht Water (DHW) Heat pumps wrk n DHW pririty Kensa Hybrid units can prduce ht water t 60 C 300L unvented ht water cylinder Mains pressure ht water thrughut Re-heat time 90mins frm cld Additinal slinkies required

11 Internal heating schematic Internal heating and ht water design Standard sealed system plumbing cnfiguratin Well insulated building s heating system can be designed with much lwer flw temperatures <50 C UFH grund flr screed Oversized radiatr r UFH upstairs, can be separately zned

12 Heat pumps & cylinders 21kW Hybrid Kensa Twin Cmpressr Integral lad n grund side pumps DHW 60 C prtable ht water 150 litre buffer vessel 5x 50m slinkies 1x 5 way manifld 12 drums f antifreeze Kit price 15,000

13 Ancillaries & Accessries

14 RHI and yur prject

15 RHI & running csts vs. il Based ver a 12 mnth perid Oil 35,000 30,000 25,000 20,000 15,000 10,000 5, ,000 24,000 3,360 4,985 2, Capital cst Running csts Maintenance csts RHI incme GSHP

16 RHI & running csts vs. il Based ver a 7 year perid 35,000 30,000 25,000 20,000 15,000 10,000 5, ,000 24,000 23,520 14,035 Capital cst Running csts Maintenance csts ,263 RHI incme 34,263 ttal RHI incme 10,325 running cst savings 44,588 ttal return

17 RHI details RHI is 19.10p kw/hr based n yur system star rating and paid n the renewable heat prduced by yur grund surce heat pump. Yu will need a Green Deal assessment Yu will need t have basic insulatin measures Yu will need t use an MCS registered prduct and an MCS registered installer The efficiency (Star Rating) f the system is dependent n the heat emitters / flw temperature A lk up table is used t assign the Renewable cntent f yur heating system based n the Star Rating

18 Significance f efficiency

19 Cmmercial prject walk-thrugh

20 Cmmercial prjects & the Nn Dmestic RHI 8 new hmes, 1 new ffice 80kW 16 x 50m slinkies 110mm MDPE distributin pipe wrk Heat pump equipment 94K Externals including trenching 30K Cst f il system 31.5K Annual savings against il 3.5K Annual Nn Dmestic RHI 11K 20 year RHI payment 220K (280K*) 20 year fuel savings 70K (100K*) Ttal 290K (380K)*Assumes inflatin at 3%

21 Kensa supprt

22 Abut Kensa Established 1999 UK manufacturer Based in Trur, Crnwall Single technlgy slutin prvider Industry accredited 5,000 installatins 30,000 slinkies installed 1,000 units int scial husing 28 different heat pump mdels

23 What makes us different Grund surce heat pump specialists Designed fr the UK market & built in the UK Single phase grund surce heat pumps up t 24kW utput Cmplete range, including slinky grund cllectrs and ht water cylinders Prject planning advice and guidance Netwrk f apprved installers MCS umbrella scheme

24 Knwledge Hub & Installer Prtal RHI calculatr Kensa infrmatin library Brchures Installatin manuals Fact sheets Applicatin and Technical Inf Sheets Vides Case studies