Transcript Folie 1 - Annex 28

IEA HPP Annex 28
Test procedure and seasonal performance calculation
of residential heat pump with combined space and
domestic hot water production
IEA HPP Annex 28 N 139
IEA HPP Annex 28
Introduction to the project
Workshop IEA HPP Annex 28
8th International Heat Pump Conference, Las Vegas, 30 May 2005
Carsten Wemhöner, Operating Agent IEA HPP Annex 28
Institute of Energy, University of Applied Sciences Basel
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Outline of the presentation
 Background of the project
 Project structure of the IEA HPP Annex 28
 Results of the state-of-the-art survey, conclusions
 Overview of national contributions
 Outline of the workshop
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Background of IEA HPP Annex 28
Source: KWT
Source: Stiebel Eltron
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Background of IEA HPP Annex 28
Solution to overcome this problem of missing comparability
 Uniform technical data (component testing)
 Possibility of comparing different heat pump system layouts
or heating systems (system calculation)
 Energy labelling (indication at point of sale)
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Background of IEA HPP Annex 28
 Manufacturers: Provision of uniform technical data
 Designers:
(competitiveness)
Technical information for system comparison
 Customers:
Product information for purchase decision
(energy costs, environmental impact)
 Policy makers: Key values to set targets in directives
(Kyoto protocol)
 based on uniform and transparent testing and calculation
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Objectives IEA HPP Annex 28
 Test procedure with a minimum of testing expense
 Easy-to-use calculation methods
 for combined operating heat pump systems for
space heating and domestic hot water production
 as recommendation for standardisation committees
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Objectives IEA HPP Annex 28
 Transparent comparison of different heating systems
 Reduction of trade barriers
 Consumer confidence
 Promotion of HP as environmentally sound technologies
 Stimulation of technology improvements
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Facts IEA HPP Annex 28
 Participants:
AT, CA, CH (operating agent), DE, FR, JP, NO, SE, USA
 Project time:
Jan 2003 – May 2005
Final report: October 2005
 Information:
http://www.annex28.net
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Structure of IEA HPP Annex 28
 Task 1: State-of-the-art survey
 Systems on the market and under development
 Existing standards for combined operating systems
 Task 2: Test procedure with minimum of testing expense
 General to cover different system configurations on the market
 Enough data to perform the seasonal performance calculation
 Task 3: Easy-to-use calculation method
 "Hand calculation method" without extensive computation
 Transparent method on the basis of publicly available data
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State-of-the-art survey - markets
 Europe:
 Mostly alternate operating systems
 Some simultaneous operating systems, research activities
 North-America
 Mostly simultaneous operating systems with desuperheating
 Air-to-air heat pumps for combined air-conditioning/DHW
 Japan
 Little combined operation
 Market introduction of system with combined floor heating/DHW
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State-of-the-art survey - standards
 Europe
 Testing standards for single operation modes heating and DHW
 European calculation method under development, national regulations
 North-America
 Testing and calculation for single operation modes heating and DHW
 Combined operation for Air-to-air heat pumps with desuperheater
 Japan
 Testing and calculation for single operation modes
 Calculation by adaptation of American standard methods
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Conclusions - Scope
 Alternate and simultaneous combined operating systems:
 Alternate: switching of the heat pump from space heating to DHW
operation
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Alternate operating system layout
Source: WPZ Töss
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Conclusions - Scope
 Alternate and simultaneous combined operating systems:
 Alternate: switching of the heat pump from space heating to DHW
operation
 Simultaneous: space heating and DHW heat production at the same
time, e.g. by
 Desuperheating of compressed refrigerant
 Subcooling of condensed refrigerant
 Cascade system layout
 Extraction of heat from the heating system supply line
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Simultaneous operating system layout
Source: TU Dresden
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Conclusions - Scope
 Alternate and simultaneous combined operating systems:
 Alternate: switching of the heat pump from space heating to DHW
operation
 Simultaneous: space heating and DHW heat production at the same
time, e.g. by
 Desuperheating of compressed refrigerant
 Subcooling of condensed refrigerant
 Cascade system layout
 Extraction of heat from the heating system supply line
 Hydronic and air distribution system
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Conclusions – System boundary
Generator with attached storages (heating buffer, DHW) and back-up
generators (e.g. supplementary electrical resistance heating)
Source:
prEN 14335 general part
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Conclusions - Testing
 Black-box testing
 System testing for highly integrated layouts
 Based on existing standards for single operation modes
Heat pump
DHW storage/
Instantaneous water
heater
Back-up heater
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Conclusions - calculation
 Based on bin-methodology
 Relative energy
requirement in the bin
corresponds to ratio of
bin areas
(weighting factor)
 Operation conditions at
operating point valid for
the entire bin
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National contributions - focus
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Structure of the Workshop
 Part 1: Introduction
 Part 2: Calculation method
 Part 3: Experiences from systems in the field monitoring
Part 4: break
Test procedure
 Coffee
 Part 5: Conclusions, Implications and Discussion
 Transparencies can be downloaded at Annex 28 website
http://www.annex28.net
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Thank you for your attention!
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