SIST EN 15879-1:2011
(Main)Testing and rating of direct exchange ground coupled heat pumps with electrically driven compressors for space heating and/or cooling - Part 1: Direct exchange-to-water heat pumps
Testing and rating of direct exchange ground coupled heat pumps with electrically driven compressors for space heating and/or cooling - Part 1: Direct exchange-to-water heat pumps
This European Standard specifies the terms and definitions, test conditions, test procedures and requirements for the rating and performance of direct exchange-to-water ground coupled heat pumps with electrically driven compressors, used for space heating and/or cooling. Brine can be used instead of water. This European Standard applies to factory-made units with horizontal in-ground collectors. In the case of units consisting of several parts, this standard applies only to those designed and supplied as a complete package. Water-to-direct exchange and direct-exchange-to-direct exchange ground coupled heat pumps are covered by EN 15879-2. Direct exchange-to-air ground coupled heat pumps and air-to-direct exchange heat pumps are covered by EN 15879-3.
Prüfung und Leistungsbemessung von Direktaustausch- Erdreichwärmepumpen mit elektrisch angetriebenen Verdichtern zur Raumbeheizung und/oder -kühlung - Teil 1: Direktaustausch/Wasser-Wärmepumpe
Diese Europäische Norm legt die Begriffe, Prüfbedingungen, Prüfverfahren für und Anforderungen an die Bemessung und Leistung von erdreichgekoppelten Direktübertragung/Wasser Wärmepumpen mit elektrisch angetriebenen Verdichtern fest, die zur Raumbeheizung und/oder Kühlung verwendet werden. Anstelle von Wasser kann auch Sole verwendet werden.
Die vorliegende Europäische Norm gilt für werkseitig zusammengebaute Geräte mit horizontal verlegten Erdwärmekollektoren. Bei Geräten, die aus mehreren Teilen bestehen, gilt diese Norm nur für die als vollständige Baueinheit konstruierten und gelieferten Teile.
Erdeichgekoppelte Wasser/Direktübertragung- und erdreichgekoppelte Direktübertragung/Direktübertragung - Wärmepumpen sind in EN 15879 2 behandelt.
Erdreichgekoppelte Direktübertragung/Luft Wärmepumpen und Luft/Direktübertragung Wärmepumpen sind in EN 15879 3, behandelt.
Diese Europäische Norm gilt nicht für Geräte, bei denen der transkritische Kreislauf, z. B. mit CO2 als Kältemittel, betrieben wird.
Essais et détermination des caractéristiques des pompes à chaleur à détente directe avec le sol avec compresseur entraîné par moteur électrique pour le chauffage et/ou la réfrigération des locaux - Partie 1: Pompes à chaleur à échange direct avec l'eau
La présente Norme européenne spécifie les termes et définitions, les conditions et modes opératoires d'essai,
ainsi que les exigences relatifs à la détermination des caractéristiques et des performances des pompes à
chaleur à échange direct de type sol/eau, avec compresseur entraîné par moteur électrique, utilisées pour le
chauffage et/ou la réfrigération des locaux. L'eau glycolée peut être utilisée à la place de l'eau.
La présente Norme européenne s'applique aux appareils à capteurs horizontaux enterrés fabriqués en usine.
Dans le cas d'appareils comportant plusieurs éléments, la présente norme ne s'applique qu'aux appareils
conçus et fournis comme un ensemble complet.
Les pompes à chaleur eau-sol et les pompes à chaleur à échange direct dans le sol, de type sol-sol, sont
couvertes par l’EN 15879-2.
Les pompes à chaleur à échange direct dans le sol, de type sol-air, et les pompes à chaleur air-sol sont
couvertes par l'EN 15879-3.
La présente Norme européenne ne s'applique pas aux appareils utilisant des cycles transcritiques, par
exemple avec le CO2 comme fluide frigorigène.
Preskušanje in ocenitev toplotnih črpalk zemlja/voda (neposredna izmenjava) z električnimi kompresorji za segrevanje in/ali hlajenje prostora - 1. del: Toplotne črpalke z neposredno izmenjavo z vodo
Ta evropski standard določa izraze in definicije, preskusne pogoje, preskusne postopke in zahteve za ocenitev in učinkovitost toplotnih črpalk zemlja/voda z neposredno izmenjavo z vodo z električnimi kompresorji, ki se uporabljajo za segrevanje in/ali hlajenje prostora. Namesto vode se lahko uporablja slanica. Ta evropski standard velja za tovarniško izdelane enote z vodoravnimi zbiralniki v zemlji. Pri enotah, sestavljenih iz več kosov, ta standard velja samo za tiste, ki so načrtovane in dostavljene kot celoten paket. Toplotne črpalke zemlja/voda na vodo-neposredno izmenjavo ter neposredno izmenjavo-neposredno izmenjavo zajema EN 15879-2. Toplotne črpalke zemlja/voda na neposredno izmenjavo-zrak in toplotne črpalke na zrak-neposredno izmenjavo zajema EN 15879-3.
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Prüfung und Leistungsbemessung von Direktaustausch- Erdreichwärmepumpen mit elektrisch angetriebenen Verdichtern zur Raumbeheizung und/oder -kühlung - Teil 1: Direktaustausch/Wasser-WärmepumpeEssais et détermination des caractéristiques des pompes à chaleur à détente directe avec le sol avec compresseur entraîné par moteur électrique pour le chauffage et/ou la réfrigération des locaux - Partie 1: Pompes à chaleur à échange direct avec l'eauTesting and rating of direct exchange ground coupled heat pumps with electrically driven compressors for space heating and/or cooling - Part 1: Direct exchange-to-water heat pumps27.080Heat pumpsICS:Ta slovenski standard je istoveten z:EN 15879-1:2011SIST EN 15879-1:2011en,fr,de01-oktober-2011SIST EN 15879-1:2011SLOVENSKI
STANDARD
SIST EN 15879-1:2011
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15879-1
February 2011 ICS 27.080 English Version
Testing and rating of direct exchange ground coupled heat pumps with electrically driven compressors for space heating and/or cooling - Part 1: Direct exchange-to-water heat pumps
Essais et détermination des caractéristiques des pompes à chaleur à détente directe avec le sol avec compresseur entraîné par moteur électrique pour le chauffage et/ou la réfrigération des locaux - Partie 1: Pompes à chaleur à échange direct avec l'eau
Prüfung und Leistungsbemessung von erdreichgekoppelten Direktübertragung - Wärmepumpen mit elektrisch angetriebenen Verdichtern zur Raumbeheizung und/oder -kühlung - Teil 1: Direktübertragung/Wasser-WärmepumpeThis European Standard was approved by CEN on 8 January 2011.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15879-1:2011: ESIST EN 15879-1:2011
EN 15879-1:2011 (E) 2 Contents Page Foreword .41 Scope .52 Normative references .53 Terms and definitions .54 Classification .65 Test conditions .65.1 Environmental conditions and electrical power supply requirements .65.2 Rating conditions.76 Rating capacity tests .86.1 Basic principles .86.1.1 Heating capacity .86.1.2 Cooling capacity .96.1.3 Power input of liquid pumps .96.2 Test equipment and facility . 106.2.1 General requirements . 106.2.2 Indoor heat exchanger . 106.2.3 Brine-bath requirements . 106.3 Installation and connection of the test object . 106.3.1 Installation . 106.3.2 Refrigerant charge . 116.3.3 Setting of inverter type control units . 116.4 Uncertainties of measurement . 116.5 Test procedure . 126.5.1 Steady state condition . 126.5.2 Measurement of heating capacity or cooling capacity . 126.6 Test results . 126.6.1 Data to be recorded . 126.6.2 Performance calculation . 137 Operational requirements . 147.1 Temperature operating range . 147.2 Safety tests . 147.2.1 General . 147.2.2 Pressure drop . 147.2.3 Shutting off the heat transfer medium flow . 157.2.4 Complete power supply failure . 158 Test report . 158.1 General information . 158.2 Additional information . 168.2.1 Rating plate . 168.2.2 Refrigerant lines. 168.2.3 Design and dimensions of the in-ground heat exchanger . 168.3 Test results . 168.3.1 Performance rating tests . 168.3.2 Limits of operation. 168.3.3 Safety tests . 179 Marking . 1710 Technical data sheet . 1710.1 General description . 17SIST EN 15879-1:2011
EN 15879-1:2011 (E) 3 10.2 Performance characteristics . 1710.2.1 Rating characteristics . 1710.2.2 Additional characteristics. 1810.2.3 Sound characteristics . 1810.3 Electrical characteristics . 1810.4 Operating range . 1811 Instructions . 1811.1 General . 1811.2 Physical description . 1811.2.1 Refrigerant and liquid circuits . 1811.2.2 Additional heating devices, when integral to the unit . 1911.2.3 Control and safety . 1911.3 Instructions for installation . 1911.4 Instruction for maintenance . 19Annex A (informative) . 20A.1 Description of the brine bath. 20Annex B (informative)
Example for the calculation of the Coefficient of Performance (COP) and the Energy Efficiency Ratio (EER) . 21B.1 Calculation of the COP for heating applications . 21B.1.1 Input Data . 21B.1.2 Calculation of the heating power PH . 22B.1.3 Calculation of the volume flow rate q . 23B.1.4 Calculation of the COP if a liquid pump is integrated into the heat pump unit . 23B.1.5 Calculation of the COP if a liquid pump is not integrated into the heat pump unit . 23B.2 Calculation of the EER for cooling applications . 23B.2.1 General . 23B.2.2 Calculation of the EER if a liquid pump is integrated into the heat pump unit . 23B.2.3 Calculation of the EER if a liquid pump is not integrated into the heat pump unit . 24 SIST EN 15879-1:2011
EN 15879-1:2011 (E) 4 Foreword This document (EN 15879-1:2011) has been prepared by Technical Committee CEN/TC 113 “Heat pumps and air conditioning units”, the secretariat of which is held by AENOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2011, and conflicting national standards shall be withdrawn at the latest by August 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. SIST EN 15879-1:2011
EN 15879-1:2011 (E) 5 1 Scope This European Standard specifies the terms and definitions, test conditions, test procedures and requirements for the rating and performance of direct exchange-to-water ground coupled heat pumps with electrically driven compressors, used for space heating and/or cooling. Brine can be used instead of water. This European Standard applies to factory-made units with horizontal in-ground collectors. In the case of units consisting of several parts, this standard applies only to those designed and supplied as a complete package. Water-to-direct exchange and direct-exchange-to-direct exchange ground coupled heat pumps are covered by EN 15879-2. Direct exchange-to-air ground coupled heat pumps and air-to-direct exchange heat pumps are covered by EN 15879-3. This European Standard does not apply to units using transcritical cycles, e.g. with CO2 as refrigerant. 2 Normative references The following referenced documents are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12102:2008, Air conditioners, liquid chilling packages, heat pumps and dehumidifiers with electrically driven compressors for space heating and cooling
Measurement of airborne noise
Determination of the sound power level EN 14511-1:2007, Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling
Part 1: Terms and definitions EN 14511-3, Air conditioners, liquid chilling packages and heat pumps with electrically driven compressors for space heating and cooling
Part 3: Test Methods EN 60204-1, Safety of machinery
Electrical equipment of machines
Part 1: General requirements (IEC 60204-1:2005, modified) EN 60335-2-40, Household and similar electrical appliances
Safety
Part 2-40: Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers (IEC 60335-2-40:2002, modified) EN 61000-3-11, Electromagnetic compatibility (EMC)
Part 3-11: Limits; Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply systems; Equipment with rated current ≤ 75 A and subject to conditional connection (IEC 61000-3-11:2000) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 14511-1:2007 and the following apply. 3.1 direct exchange ground coupled heat pump heat pump which consists of an in-ground heat exchanger and a heat pump module 3.2 in-ground heat exchanger heat exchanger buried in the ground that consists of a series of parallel loops, each consisting of a single tube, in which the refrigerant is circulating for a direct heat exchange with the ground SIST EN 15879-1:2011
EN 15879-1:2011 (E) 6 NOTE 1 The in-ground heat exchanger is connected to the heat pump module through vapour and liquid refrigerant lines. NOTE 2 The in-ground heat exchanger is specified by the number and length of the parallel loops and the diameter of the single tubes. 3.3 heat pump module assembly containing the refrigerating circuit components including the compressor, the expansion device, the indoor heat exchanger, all auxiliary components, control and safety devices and the refrigerant lines excluding the in-ground heat exchanger 3.4 brine-bath temperature temperature of the brine which is maintained in the bath where the in-ground heat exchanger tubes are immersed, and which is calculated as the mean value of the brine at the inlet and outlet of the bath 4 Classification The units are denominated in such a way that the heat transfer medium for the outdoor heat exchanger is given first, followed by the heat transfer medium for the indoor heat exchanger (see Table 1). Table 1
Designation of direct exchange-to-water (brine) heat pumps Outdoor heat exchanger Indoor heat exchanger Designation Classification In-ground heat exchanger Water Direct exchange-to-water units DX / water Brine Direct exchange-to-brine units DX / brine
5 Test conditions 5.1 Environmental conditions and electrical power supply requirements The test shall be carried out under the environmental conditions around the heat pump module specified in Table 2. For all units, electrical power, voltage and frequency shall be given by the manufacturer. Table 2
Environmental conditions Type Measured quantity Environmental conditions DX / water or DX / brine to be installed outdoors – heating operation Air dry bulb temperature 0 °C to 7 °C DX / water or DX / brine to be installed outdoors – cooling operation Air dry bulb temperature 25 °C to 35 °C DX / water or DX / brine to be installed
indoors – heating or cooling operation Air dry bulb temperature 15 °C to 30 °C SIST EN 15879-1:2011
EN 15879-1:2011 (E) 7 5.2 Rating conditions For the rating tests, the appropriate test conditions shall be applied in accordance with: Table 3 for the heating mode; Table 4 for the cooling mode. Table 3
Rating conditions for the heating mode
In-ground heat exchanger Indoor heat exchanger
Bath temperature (°C) Inlet temperature (°C) Outlet temperature (°C)
Standard rating conditions DX / water or DX / brine for low heating temperature applications 4 30 35 DX / water or DX / brine for medium heating temperature applications 4 40 45 DX / water or DX / brine for high heating temperature applications 4 47 55 DX / water or DX / brine for very high heating temperature applications 4 55 65 Application rating conditions DX / water or DX / brine for low heating temperature applications 4 25 30 DX / water and DX / brine for low heating temperature applications 1,5 30 35 DX / water and DX / brine for medium heating temperature applications 1,5 40 45 SIST EN 15879-1:2011
EN 15879-1:2011 (E) 8 Table 4
Rating conditions for the cooling mode
In-ground heat exchanger Indoor heat exchanger
Bath temperature (°C) Inlet temperature (°C) Outlet temperature (°C) Standard rating conditions DX / water or DX / brine for high cooling temperature applications 30 23-a 18 DX / water or DX / brine for low cooling temperature applications 30 12-a 7 Application rating conditions DX / water or DX / brine for high cooling temperature applications 10 b 18 DX / water or DX / brine for low cooling temperature applications 10 b 7 (a) For reversed cycle units, the test is performed at the flow rate obtained during the test for the corresponding standard rating conditions in the heating mode in Table 3. (b) With the water flow rate as determined for the standard rating condition. 6 Rating capacity tests 6.1 Basic principles 6.1.1 Heating capacity The heating capacity of direct exchange heat pumps shall be determined in accordance with the direct method at the water or brine heat exchanger. This shall be done by determination of the volume flow of the heat transfer medium and the inlet and outlet temperatures, taking into consideration the specific heat capacity and density of the heat transfer medium. The heating capacity shall be determined using the following formula: PH = q × ρ × cp × ∆T (1) where PH
is the heating capacity, in watts; q
is the volume flow rate, in cubic meters per second; ρ
is the density, in kilograms per cubic meter; cp
is the specific heat at constant pressure, in joules per kilogram per kelvin; ∆T
is the difference between inlet and outlet temperatures, in kelvin. The heating capacity shall be corrected for the heat from the circulating pump: if the pump at the indoor heat exchanger is an integral part of the unit, the same power (calculated in 6.1.3.1) which is excluded from the total power input shall also be subtracted from the heating capacity; SIST EN 15879-1:2011
EN 15879-1:2011 (E) 9 if the pump at the indoor heat exchanger is not an integral part of the unit, the same power (calculated in 6.1.3.2) which is included in the effective total power input shall also be added to the heating capacity. 6.1.2 Cooling capacity The cooling capacity of direct exchange heat pumps shall be determined in accordance with the direct method at the water or brine heat exchanger. This shall be done by determination of the volume flow of the heat transfer medium and the inlet and outlet temperatures, taking into consideration the specific heat capacity and density of the heat transfer medium. The cooling capacity shall be determined using the following formula: PC = q × ρ × cp × ∆T (2) where PC
is the cooling capacity, in watts; q
is the volume flow rate, in cubic meters per second; ρ
is the density, in kilograms per cubic meter; cp
is the specific heat at constant pressure, in joules per kilogram per kelvin; ∆T
is the difference between inlet and outlet temperatures, in kelvin. The cooling capacity shall be corrected for the heat from the circulating pump: if the pump at the indoor heat exchanger is an integral part of the unit, the same power (calculated in 6.1.3.1) which is excluded from the total power input shall also be added to the cooling capacity; if the pump at the indoor heat exchanger is not an integral part of the unit, the same power (calculated in 6.1.3.2) which is included in the effective total power input shall also be subtracted from the cooling capacity. 6.1.3 Power input of liquid pumps If the liquid pump is integrated in the unit, it shall be connected for operation. When the liquid pump is delivered by the manufacturer apart from the unit, it shall be connected for operation according to the manufacturer’s instructions and be considered as an integral part of the unit. 6.1.3.1 If a liquid pump is an integral part of the unit, only a fraction of the input to the pump motor shall be included in the effective power absorbed by the unit. The fraction which is to be excluded from the total power absorbed by the unit shall be calculated from the following formula: ûη×=[]eLPqpPW (3) where η is the efficiency of the liquid pump according to EN 14511-3; ∆pe is the measured external static pressure difference as defined in EN 14511-1, in pascal; q is the nominal heat transfer medium flow rate, in cubic meters per second. 6.1.3.2 If no liquid pump is provided with the unit, the proportional power input which is to be included in the effective power absorbed by the unit, shall be calculated using the following formula: SIST EN 15879-1:2011
EN 15879-1:2011 (E) 10 ()[]∆η×−=iLPqpPW (4) where η is the efficiency of the liquid pump according to EN 14511-3; ∆pi is the measured internal static pressure difference as defined in EN 14511-1, in pascal; q is the nominal heat transfer medium flow rate, in cubic meters per second. 6.2 Test equipment and facility 6.2.1 General requirements The test apparatus shall be designed such that all requirements on adjustment of set values, stability criteria and uncertainties of measurement according to this European Standard are satisfied. 6.2.2 Indoor heat exchanger The test apparatus shall be able to provide and maintain constant during the tests the temperatures and flow rates at the values specified in Table 3 and/or Table 4 with the requirements of Table 5. 6.2.3 Brine-bath requirements The in-ground heat exchanger shall be immersed in a brine-bath. An informative description of the brine-bath is given in Annex A. The test apparatus shall be able to provide and maintain constant during the tests the brine temperature in the bath at the values specified in Table 3 and Table 4 with the requirements of Table 5. Monoethylene glycol shall be used as antifreeze agent in the brine with a concentration of 33 % volume per volume. The velocity of the brine in the bath shall be kept as low as possible not to enhance the heat transfer between the brine and the in-ground heat exchanger too much. 6.3 Installation and connection of the test object 6.3.1 Installation The module of the heat pump shall be connected according to the manufacturer's installation and/or operation manual. The in-ground heat exchanger shall be immersed in a brine-bath. The length of the loops in the bath shall be as stated by the manufacturer. The distance between the neighbouring windings of the loops shall be larger then 0,035 m, measured form the centres of the adjacent pipes. The in-ground heat exchanger shall be installed in accordance with the following requirements: the number and the length of the loops as well as their connection to the heat pump module shall be in accordance with the manufacturer instructions; the maximum length of the refrigerant lines between the brine bath and the heat pump module shall not exceed 7 meters; the refrigerant lines shall be installed so that the difference in elevation between the lowest and the highest point of each of the lines does not exceed 0,3 m plus the height of the heat pump module itself; SIST EN 15879-1:2011
EN 15879-1:2011 (E) 11 the thermal insulation of the refrigerant lines shall be in accordance with the manufacturer's instructions. 6.3.2 Refrigerant charge The charge of refrigerant is dependent on the length of the loops of the in-ground heat exchanger. The charge shall be defined for each standard rating condition and remains constant during the test. If the unit is operating in both heating and cooling mode, the charge is defined for the heating mode and shall remain the same for the cooling mode. If the unit is operating in the cooling mode only, the refrigerant charge is defined for this mode. Heat pump start-up should be performed by a manufacturer's representative. Otherwise, the test laboratory shall charge the unit according to the prescriptions of the manufacturer, which shall include: a pre-charge quantity of refrigerant for the chosen standard rating condition; the superheating temperature to be obtained; the setting of the expansion device or other components for achieving a correct refrigerant charge and operation of the heat pump. 6.3.3 Setting of inverter type control units For inverter type control units, if the manufacturer gives instructions for the setting of the frequency for each rating condition, this setting shall be done. 6.4 Uncertainties of measurement The uncertainties of measurement shall not exceed the values specified in Table 5. Table 5
Uncertainties of measurement for indicated values Measured quantity Unit Uncertainty of measurement Environmental air dry bulb temperature °C ± 1 K Heat transfer medium temperature °C ± 0,1 K Brine temperature in the bath °C ± 0,1 K Brine concentration vol/vo
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