GSHP Training for Plumbcenter - Delivered by Kensa Heat Pumps - November 2011

Expertise | Service | Quality

©Kensa Engineering Ltd 20091

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Plumbcenter

Introduction to Kensa Heat pumps

UK Manufacturers



Introduction to Kensa

UK Manufacturer of Heat pumpsCommercial office in ExeterOver 2500 Kensa units in ServiceOver 11 years production expertiseOver 15000 Slinkies installedISO 9001 ApprovedFull MCS accreditationIndustry Award Winners 2008/2009No Immersion heaters inside



Contents

Market & RHI Overview

How A heat pumps works

Product

Qualification

Life of a Project – Sizing A Heat pump

Installation and running costs

Specialist



The Opportunity – Market Projections

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UK Renewable Heat Supply Curve, published in July 2009 with Renewable Energy Strategy:

– 1,220,000 GSHP installations by 2020.

Committee for Climate Change – December 2010:

– 7,000,000 heat pump installations by 2030 (1 in 4 UK homes).



Current Position - BSRIA

Tables extracted from the BSRIA World

Renewable Report published in

November 2010



RHI

Commercial projects 4.5p/kw/hr

Commences Jan 2012 – Heat Meter

Domestic RHI October 2012

RHI Premium Payment – £1250 Off Gas Only

May not support mains Gas Projects

No Tariff announced

No details yet on monitoring

Specialist



The Kensa MCS Umbrella Scheme

Kensa are an accredited MCS installer and manufacture MCS accredited products.

Providing installers a FREE of charge commissioning with a Kensa Technical Support Specialist based in the Kensa

Commercial Office.

This level of support through the installation, provides the installer and the client with MCS accreditation for the installation.

Eligible for RHI and Grant Funding



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Heat Pump Cycle



Slinky ground arrays



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Heat Pump Internals

Compressor

Evaporator H/XCondenser H/X

Ground Array Water Pump

Underfloor Water Pump

Pressure Gauges

Controller



Specification of Heat Pump

All Kensa units come complete with:

Ground and load side circulation pumps within the appliance cabinet to simplify installation and reduce costs.Advanced control system to permit remote diagnostics to eliminate the need for unnecessary maintenance visits.‘Smart starts’ to spread the starting electrical current Compact design to allow installation into small spaces with pipe connections under the unit

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Compact Range

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Plantroom Range

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What We Supply

Design and manufacture ground source heat pumps and accessories.

Market via network of authorised distributor and installation partners.

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Qualification – How do we budget Price projects

• New build or Part L Compliant• Size HP on building floor area x 40w/m• Size on 100% of Heat loading• Establish Space heating UFH/Radiators• Establish DHW method• Establish land area available• Budget price project• Poorly insulated building – Will refuse to

quote



Internal area – Ground Floor

Total Internal area = 310m2

Ground Floor - Sizing

Heat load =

310 x 40 (If New Build)

=12400W

=12.40Kw



First Floor - Sizing

235 x 0.40 (If New Build)

= 9400 W= 9.4Kw + 12.40Kw21.80Kw + DHW

Internal area – First Floor

Total Internal area= 235 sq/m



Pricelists



Ideal sizing – Line 37!

SAP Report - Line 37

Heat Loss Coefficient x Temperature Rise -7°C (Min) to 21°C (Max) = 28°C rise

688.02 x 28 = 19264W



Example Quotation



Example Sales Order Form

Simple one page order form already filled out, to be signed and returned to Kensa Engineering.



Project Handling – How will we work together?

Enquiry made to Plumb Center from installer

Plumb Center to obtain plans and upload to Kensa website

Kensa contacts installer directly to discuss project

Kensa quote Plumb Center with 35% discount

Plumb Center quote installer less 15 – 20%

Installer places order with Plumb Center

Plumb Center places order with Kensa

Installer deals directly with Kensa during installation and commissioning



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UFH

Design of the UFH criticalLowest possible input temperaturePipe work installed at tighter centresFloor covering affects COPBuffer Tank – Full Control (user friendly)Programmable room thermostats E10Future proofingCooling – Potential issues



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UFH/Radiator split

UFH screed – thermal inertia (40)Radiators on demand system (50)Screed system will be heated firstZone Control for UFH and RadiatorsInitial warm up 4/5 daysImportant – UFH needs decent ‘set back’

Radiators 50% oversized



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DHW

Heat pump size 20KwWorks on hot water priorityCylinder 30% oversizedLarger Surface area Indirect coil requiredOrdinary cylinder coils to small Potable water 50 – flow temp 55 maximumCOP around 2.5 (5.5p/Kw)Kensa Recommend Solar and Tariff 10Thermal stores don’t work very well



DHW Cylinders

Single or Twin Coils(Coil designed and sized for Heat Pump applications)

3kW Immersion Heater

Expansion Vessel

G3 Kit

Stainless Steel tanks guaranteed for 25 years against leaks.



Space Heating and DHW Provided by GSHP with Underfloor Heating and Radiators



Heat pump Location

Ecoflex to carry the heat into the house.



Noise Issues

Keep the heat pump away from noise sensitive areas.Similar noise to an oil fired boiler or running dishwasher.Can install external to the building at the back of a garage or in a lean to.



How would the CompetitionApproach the same project

Sized for 70% of the space heating load which is 13.5kW loadWeather Compensated3 phase after 12KwNo additional ground arrays for DHWSupply Straight ground arrays or don’t supply the whole kitHave Immersion heaters insitu to make up the shortfallWe all use the same components



Ground Arrays



Slinky ground arrays



Ground array - sizing

Heat pump output 20KWEvery 10m of slinky provides 1kW of energyExample 50mtr slinky = 5Kw output (space htg)Establish number of Slinkies (4)Spaced 5mtrs apart 4 x 50 x 5 =1000sq/mSlinky Lengths 30(200M) 40(250)50(300) Sized for worst case scenario (Chalk)Buried either vertically or horizontallyInstall Slinky’s when foundations dugRe-Charging – High water table - Soak waysEstimate £500-£750 per trench



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DHW Ground Design

Heat pump size 20Kw

400ltr Cylinder requires heating = additional

load

DHW Requires additional ground arrays coil

5 x 50 x 5mtrs apart = 1250sq/m

Additional trenching required - Additional cost

Coils lengths based on SAP methodology for

DHW demand



Installation Costs

Trenching by ground workersNo need to roll the slinky out in the trench8/12hrs per trench to dig/backfillSand required if soil is rockyPressure testing prior to backfillingPlumber connects tails to manifold and pressures testsStraight pipe more trenches – no where to dump spoil – cannot pressure test – more cost£500 to £750 per trench to dig and backfill



Lake systems / Pond Mats

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Boreholes



Ground arrays - Boreholes

Twin probe borehole ready for

TRT:

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Borehole Sizing

Insufficient ground for slinkies.Drilling – Specialist areaNeed site survey – Land Registry20metres borehole depth = 1kWProbe and grouting from Driller£50 L/m Budget pricingDomestic applications - Costly8m separationOpen loop boreholes (potable)Thermal response testing



Undersize the amount of pipe requiredUndersize the pipe required for DHWInstall the pipe work to close togetherInstall the pipe work to shallowUnder estimate the borehole depth

Ground arrays Do Not’s

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All of the above can cause poor performance from the heat pump causing high fuel bills,

frozen ground and cold buildings.Direct immersion heaters will take up the slack



Manifolds

20Kw HP requires a 4/5 port manifoldEach Slinky comes with 25mtr F&R tailsManifold should be mounted verticallyInstalled externally - condensateManifolds can be installed remotelyManifolds cross valve with fill and purge pointsPressure test before back filling – best practice



Manifolds

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Single Manifold

2 and 3 way Universal Manifolds

4 Way (and above) Manifolds (Left Handed) Header Manifolds



Slinky Manifolds



Oil Prices

Oil has risen by 60%+ in the last 2yrs



LPG has risen by the same %Oil at 65p/litre and 85% efficiency equates to 7.5pkW/hrLPG at 50p/l and 85% efficiency equates to 8.2pkW/hr Oil being StolenServicing costs & response maintenanceReplacement costsTypical Oil fired Installation costs 6K

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Oil Boilers



Existing Running cost– Oil at 65p/l Efficiency 85% = 7.5p/kWh

30,195kW x 7.5p/kWh + £150 Service Charge = £2,414.00

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Cost Savings – Example

• =£2414



20kW heat pump £9.4KCylinder /Buffer Tank £2KInternal work £1.6KGround arrays / peripherals £4KTrench Installation £3KManifold/pressure test £1KLess Oil fired Boiler £6KTotal £15K

No Servicing Requirements – 23yr lifespan

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Slinkies Final Costing



20kW Heat Pump £9.4KCylinder /buffer £2KInternal work £1.6KBoreholes/ peripherals £22KManifold/pressure test £1KLess Oil fired Boiler £6K

Total £30K

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Borehole Final Costing



Heat Pump running cost- Electricity at 13p/unit- COP 3 (50) - = 4.3p/kWh

30,195kWh x 4.3p/kWh = £1298.00

Cost saving. Oil less Heat pump running cost

£2414.00 - £1298.00 = £1116

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Cost Savings – Example



Cost Savings – Example Today

RHI Payment30,195kWh x 5.0p/kWh = £1509Paid for 23 Years.

Total Annual benefit (£1116 + £1509)

= £2625



Annual saving = £2,625Installation Cost = £21,000ROI = 11%

Payback in 8 Years.

Boreholes increase = £36KROI = 7%Payback in 14 yearsOil boiler change = £6K +

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Return On Investment



High Temperature Range

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High Temperature Price lists



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High Temperature Units

Can produce up to 60°CDifferent refrigerant an CompressorsIdeal for Oil Retro fit MarketNeed to be careful with extg rad sizesWhole house insulation method EPC31195kW/hr/2.2 x0.13 = £1843Oil £2472-£1843 = £629RHI £1509Total Annual saving £2138



Specialist

Reverse Cycle Cooling – no grant availableOpen Loop systemsPond mats systems (Closed loop)Internal Swimming PoolsRNLITRT TestingHigh Temperature ModelsTraining units



RNLI

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Installer Training

One Day Hands-On Training for installersTraining held at the manufacturing facility in TruroCourses run throughout the summer months – March to September.Ideal for the Installer prior to the first install



Factsheets

Kensa have a number of PDF factsheets available for download from our website.

Visit www.kensaengineering.com forfurther information.

Factsheets will also be sent to you on a CD. You will receive this in the post.



Slinkies

PDF available from the website. Short overview of slinky

installation.



Boreholes

All of our factsheets will be provided to

you on a disk, which we will send to you

after this presentation.



Awards

Ashden Awards‘2008 UK Business of the Year’

2009 Housing Excellence Awards‘Product of the Year’

2009 Corgi Awards ‘Green Manufacturer of the Year’

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25kW High Temperature unitTwo Hybrid Single phase heat pumpsNew controls packageHeat MetersThe Ssssshhhooo

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New for 2012



Niche market products Integration solutions – wood burningExperienceExpertiseDelivered the largest social housing project 300 units and growingCase HistorySpecialist – RNLIEasy to deal with

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Summary

GSHP Training for Plumbcenter - Delivered by Kensa Heat Pumps - November 2011

Business

Transcript of GSHP Training for Plumbcenter - Delivered by Kensa Heat Pumps - November 2011