10 years of heat pump monitoring in germanyheatpumpingtechnologies.org/archive/hpc2017/wp... ·...

Outcomes of several monitoring campaigns.

10 YEARS OF HEAT PUMP MONITORING IN GERMANY

Marek MiaraFraunhofer-Institut für Solare Energiesysteme ISE12th IEA Heat Pump ConferenceRotterdam, 17.05.2017

www.ise.fraunhofer.de

69 Fraunhofer institutes

Staff totals more than 24 500

Established: 1981

Staff totals more than 1100

2015 Budget: € 73 million

Energy Demand of a Building versus Heat Pump Efficiency

Energy demand

Efficiency

low high low

0 30 60 120 kWh/m²a

Newly-build and existing buildings

Single family houses, 100-300 m² (1100-3200 sq ft)

Heat pumps with air and ground as a heat source

All units covering heating and domestic hot water

Various manufactures, heating power 6 kW to 25 kW

Characteristics of the Projects

energysupplier

7HPcompanies,2energysupp.,Gvfunding

12heatpumpscompanies

9HPcompanies,3energysupp.,Gvfunding

num

ber o

f hea

t pum

p in

stal

latio

ns

HP Efficiency

Smart heat pumps in Existing BuildingsHP Monitor

HP in ExistingBuildings

Main Goals

assessment of the efficiency of new heat pumps in residential buildings

finding the way to optimize heat pump systems, their installation and control procedures

Heat sources of the analysed heat pumps

Boundary for the Seasonal Performance Factor SPF

Average values and ranges of the SPF

1,0 2,0 3,0 4,0 5,0 6,03,4 6,8 10,2 13,6 17,1 23,5[BTU/Wh]

2,2 4,2

2,3 3,4

2,1 3,3

2,2 4,3

3,1 5,1

3,0 5,4

2,63,3

3,92,9

4,0

3,1 3,2*

4,3**groupofnewunits

outsideairheatpumps groundheatpumps numberofunits

35

projectname

HPinExistingBuildings

HPEfficiency

HPMonitor

newbuildings

SeasonalPerformanceFactor(SPF)of:evaluationperiod

01.2008-12.2009

07.2007-06.2010

07.2012-06.2013

36

18

56

35

45

Example of a hydronic system designGood result

Example of a hydronic system designPoor result

COPSCOP EER

SEERSPF

HSPF

η, (eta)

APF

JAZSPF

JAZPerformance Figures

CSPF

Performance Figures

1. group 2. group 3. group

measured under certain conditions

calculated with certain method

measured under various conditions for

certain period

calculation

para

met

er

Quasi-stationary operating conditions method

n Based on EN 14511 requirementsn Data evaluation to find the quasi-stationary periodsn COP values for each temperature points have been interpolated based on 4

laboratory COP valuesn Deviation comparison of the COPQS values and interpolated COP values

Characteristics of quasi-stationary conditions for a single ground source heat pump system

Deviation of the COPQS values and interpolated COP values(1 installation)

Group evaluation and limitations of the method

n In both types of the heat source - air and ground - the average deviation between laboratory COP values and field measured COPQS values is rather small and amounts to less than 10%

n The first evaluation shows in general that the air to water units run in the field with higher efficiency than in the laboratory, opposite to the ground coupled heat pumps

n The efficiency measured in the laboratory under stationary conditions can be confirmed in the field in the majority of cases

n Limitations of the quasi-stationary conditions method

Summary

Heat pumps work well.

Heat pumps usually work well.

Heat pumps work well if they are a part of a carefully designed, preferably simple system, well installed by properly educated and skilled installers and used by aware and well-

behaving end users.

www.wp-monitoring.de

Thank [email protected]

10 years of heat pump monitoring in germanyheatpumpingtechnologies.org/archive/hpc2017/wp... ·...

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