1 PIPE SYSTEM RENOVATION 20/02/2018, Lithuania. Calculation methods applying in Optimal Tool1 solutions. Viktor Pyrkov Ukraine
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1 1 PIPE SYSTEM RENOVATION 20/02/2018, Lithuania Calculation methods applying in Optimal Tool1 solutions. Ph.D., Ass. Professor, Energy Efficiency Expert Viktor Pyrkov Ukraine 1 Heating Solutions
2 CONTENT 1/ Old and new one-pipe systems efficiency 2/ Old and new heat-carrier temperatures 2 Heating Solutions 1-st heat insulation building component 3/ Old and new β coefficient (with TRV) 2-nd heat insulation building component Coefficient β and heat emission of a radiator Radiator hanging effect Radiator back-flow effect 4/ Old and new heat-carrier return temperature (with AB-QT) 3-rd heat insulation building component Air locking effect Noise 5/ Pump optimization 6/ Installation of a bypass 7/ Modernization of П shape OLD systems
3 NEW INFORMATION FOR SPECIALISTS Method for calculation of system energy requirements and system efficiencies LST EN :2017 with explanation and justification in СEN/TR :2017 LST EN :2017 with explanation and justification in СEN/TR :2016 Scientific methods V. Mileikovskyi s articles (were published in e-journal ДанфоссINFO and other scientific journals) #1-2/2013, #3-4/2013, #1-2/2014, Вып. 2/2014-1/ Calculation examples in the manuscript of the book V. Pyrkov, V. Mileikovskyi Heating systems in the examples. Regulation and energy efficiency (were published in e-journal ДанфоссINFO) part 1 in Вып. 1/2016, part 2 in Вып. 2/2016, part 3 in Вып. 1/2017, part 4 in Вып. 2/ next parts are being prepared and will be published Engineering methods Danfoss guide Renovation of one-pipe system in an easier way Optimal 1 Tool 3 Heating Solutions
4 Old and new one-pipe systems efficiency LST EN :2017 Energy performance of buildings - Method for calculation of system energy requirements and system efficiencies - Part 2: Space emission systems (heating and cooling), Module M3-5, M4-5 CEN/TR :2017 Energy performance of buildings. Method for calculation of system energy requirements and system efficiencies. Explanation and justification of EN , Module M3-5, M4-5 LST EN :2017 Energy performance of buildings. Method for calculation of system energy requirements and system efficiencies. Space emission systems (heating and cooling), Module M3-5, M4-5 CEN/TR :2016 Energy performance of buildings. Accompanying TR pren :2015. Modules M10-4,5,6,7,8,9,10 4 Heating Solutions
5 Old and new one-pipe systems efficiency. Hydronic balancing EN used tabl.18 ДСТУ Б А : iterature_files/dstu_nba _2015.pdf OLD system (quasi constant flow) OLD system with MSV-BD (quasi constant flow) OLD system with ASV-Q or AB-QM (constant flow) NEW system with AB-QT (variable flow) NEW system with AB-QTE (variable flow) 5 Heating Solutions
6 Old and new one-pipe systems efficiency. Hydronic balancing OLD system (quasi constant flow) without hydronic balancing and TRV OLD system (constant flow) with TRV and ASV-Q or AB-QM NEW system (variable flow with return temperature limitation) with TRV and AB-QT NEW system (variable flow with supplyreturn difference) with TRV and AB-QTE 6 Heating Solutions
7 Old and new one-pipe systems efficiency. Temperature variation RADIATOR CHARACTERISTIC with different koef. β NEW system with AB-QT or AB-QTE OLD system 7 Heating Solutions
8 Old and new one-pipe systems efficiency. Temperature variation. Indication of tsupply in old systems Plug Screwdown stop valve Plug valve 8 Heating Solutions
9 Old and new one-pipe systems efficiency. Room space temperature regulation OLD system NEW system Certified TRV based on EN 215 Thermostatic radiator valves Requirements and test methods energy saving regime 16 С; comfort regime with CA<2K; comfort regime with CA 2K 9 Heating Solutions
10 Old and new one-pipe systems efficiency. Room space temperature regulation Heating Solutions
11 Old and new heat-carrier temperatures 1-st heat insulation building component. OLD heatcarrier temperatures, С 105/70 95/70 90/70 85/65 80/60 11 Heating Solutions Heat insulation of a building Q and changing heat-carrier flow rite G, % Q, % G, % Q, % G, % Q, % G, % Q, % G, % Q, % G, % For 9- story building. Number section of a radiator: NEW heat-carrier temperatures, С 95/70 90/70 85/65 80/60 70/55 4,6 32,8 7,1 61,3 2,7 21,4 18,0 42,6 4,1 7,4 11,7-11,6 28,6 24,4 25,2-6,3 23,1-22,8 12,9-12,8 41,1 36,7 38,3 3,0 36,6 36,2* -15,2 28,2-4,1 17,5 9,9 *DIN-V The design temperatures can be adjusted where existing have been refurbished. If no new detailed design is to be carried out and the existing emitter are retained, the design temperatures can be roughly adjusted as a function of the old and new heat load. 95/70 25,2 % Heat insulation of building (1-st component) 80/60
12 Old and new β coefficient (with TRV) 2-nd heat insulation building component β = 1 β 0,4 OLD КРД Before 1976 [СНиП II-33-75] β 0,2 β = 1 Without valve β = 0,2 0,35 Thermoregulator 12 Heating Solutions
13 αб αб αг αб αг NEW β coefficient Результат Схема движения теплоносителя сверху-вниз Схема движения теплоносителя снизу-вверх Без учёта естественного давления. Среднее значение Узел Положение TRV G, кг/ч без учёта естественного давления с учётом естественного давления: t г = 90 С, Q ном = 1000 Вт без учёта естественного давления с учётом естественного давления: t г = 90 С, Q ном = 1000 Вт Коэффициен Потери давления Δp, Па Хар-ка S, Па/(кг/ч) 2 Коэффициен Потери давления Δp, Па Хар-ка S, Па/(кг/ч) 2 Коэффициен Потери давления Δp, Па Хар-ка S, Па/(кг/ч) 2 Коэффициен Потери давления Δp, Па Хар-ка S, Па/(кг/ч) 2 Коэффициен Потери давления Δp, Па Хар-ка S, Па/(кг/ч) 2 т затекания замыкающе приборной замыкающе приборной т затекания замыкающе приборной замыкающе приборной т затекания замыкающе приборной замыкающе приборной т затекания замыкающе приборной замыкающе приборной т затекания замыкающе приборной замыкающе приборной узла узла узла узла узла го участка ветви го участка ветви го участка ветви го участка ветви го участка ветви го участка ветви го участка ветви го участка ветви го участка ветви го участка ветви 15/15 осевой Открыто 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , с дрос. обр. потока Открыто 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , с байпасным дросселем Открыто 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , с дрос. байп. и обр. потока Открыто 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , /15 смещённый Открыто 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 200 0, , , , , , , , , , , , , , , , , ,7614 0, , , , , , , , , , , , с дрос. обр. потока Открыто 200 0, , , , , , , , , , , , , , ,3265 0, , , , , , , , , , , , , , , K 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , с байпасным дросселем Открыто 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , с дрос. байп. и обр. потока Открыто 200 0, , , , , , , , , , , , , , , , , , , , ,4025 0, , , , , , , , , K 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 200 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , /15 осевой Открыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , с дрос. обр. потока Открыто 430 0, , , , , , , , , , , , , , ,4717 0, , , , , , , , , , , , , , , K 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , с байпасным дросселем Открыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , с дрос. байп. и обр. потока Открыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , /15 смещённый Открыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , с дрос. обр. потока Открыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 430 0, , , , , , , , , , , , , , ,8204 0, , , , , , , , , , , , , , , Почти закрыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , с байпасным дросселем Открыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 430 0, , , , , , , , , , , , , , ,7822 0, , , , , , , , , , , , , , , с дрос. байп. и обр. потока Открыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 430 0, , ,5012 0, , , , , , , , , , , , , , , , , , , , , , , , , , , /20 осевой Открыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , с дрос. обр. потока Открыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , с байпасным дросселем Открыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , с дрос. байп. и обр. потока Открыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , /20 смещённый Открыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , с дрос. обр. потока Открыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , с байпасным дросселем Открыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , с дрос. байп. и обр. потока Открыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , K 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Почти закрыто 430 0, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , β for steel pipe (Radiator 1 kwt) PeX pipe fitting 13 Heating Solutions
14 Old and new β coefficient (with TRV) 2-nd component insulation of a building Heat insulation of a building (2-nd component) Dead zone of a radiator regulation 14 Heating Solutions
15 NEW β coefficient. Radiator hanging effect Obligatory using of a bypass restrictor on a bypass of a bottom-up riser. Guarantee Pmin 125 Pa for bypasses on a bottom-up riser. 15 Heating Solutions
16 NEW β coefficient. Radiator back-flow effect A minimum metering with heat cost allocators should be Q/Qn 5 % when closed TRV. Use - or a Back-flow Restrictor, - or longer pipes to a radiator, - or a convector instead of a radiator, - or a not high radiator, if Q/Qn > 5 %. If Qrest > 5%Qnom use 16 Heating Solutions
17 Old and new return heat-carrier temperature (with AB-QT) 3-rd heat insulation building component Q new3,riser /Q old2,riser 5 floors building 50 % 1,0 0,9 0,8 ОП1 t sup = 80 C ОП1 9 floors building 0,7 0,7 ОП2 ОП2 0,6 0,5 ОП3 Riser chart!!! 0,4 0,3 0,2 0,1 Risers 0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1,0 1,1 1,2 1,3 Gnew3,riser /Gold1,riser ОП4 ОП5 t ret = 63 C Q new3,riser /Q old2,riser = G new3,riser (80 t AB-QT ) /G old1,riser (80 63) t ret ОП8 ОП9 β 0,3 β 0,3 t AB-QT = 80 (Q new3,riser /(Q old2,riser )(G old1,riser /G new3,rise )(80 63)= = 80 0,5 4,0 17 = 46 C t ret t ret Q ridiator = 0,5 1,0 kwt 17 Heating Solutions
18 Heat insulation building components 1-st heat-carrier temperatures change 2-nd β coefficient (with TRV) change 3-rd heat-carrier return temperature (with AB-QT) change 1-st+2-nd 1-st 2-nd 3-rd 1-st+2-nd+3-rd 95/70 25,2 % 80/60 95/70 24,1 % 80/63 Gnew1,riser /Gold1,riser = 1-0,063 Gnew1,riser /Gold1,riser = 1 95/70 80/63 32,7 % 11,3 % 80/63 80/63 Gnew2,riser /Gold1,riser = 1 80/63 50 % 95/70 66,3 % 80/46 80/46 Gnew3,riser /Gold1,riser = 1-0,75 18 Heating Solutions
19 Airlocking Air locking effect. Noise Q new3,riser /Q old2,riser 5 radiators 50 % 1,0 0,9 0,8 ОП1 t sup = 80 C ОП1 9 radiators A circulation pump should be installed on a heating system supply pipeline. Install an automatic air separator after a circulation pump. Install an automatic airvent on a top of a riser or an upper radiator. 0,7 0,7 0,6 0,5 0,4 0,3 0,2 0,1 Risers 0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1,0 1,1 1,2 1,3 Gnew3,riser /Gold1,riser ОП2 ОП3 ОП4 ОП5 t ret = 63 C t ret ОП2 ОП8 ОП9 β 0,3 β 0,3 t ret NOISE Q ridiator = 0,5 1,0 kwt 19 Heating Solutions
20 Noise LST EN 15251:2007 Pastatams projektuoti ir jų energetinėms charakteristikoms įvertinti skirti vidaus aplinkos įvesties parametrai, apimantys vidaus oro kokybę, šiluminės aplinkos, apšvietimo ir akustines charakteristikas 20 Heating Solutions
21 PUMP OPTIMIZATION P closed TRV (1 + 0,3) P riser P +30 % PAB-QM min = kpa Priser = kpa + 0.3( Psystem) P/ P max 1,3 1,2 1,1 1,0 0,9 0,8 0,7 0,7 0,6 0,5 0,4 0,3 0,2 0,1 Closed TRV TRV 2K+Back- Flow Restrictor TRV 2K By-Pass Fully opened TRV+ +Back-Flow Restrictor Fully opened TRV P AB-QM,min = 16 кпа для d 20 мм; P AB-QM,min = 20 кпа для d 25 мм By-Pass + By-Pass Restrictor 21 Heating Solutions 0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1,0 1,1 1,2 1,3 1,4 1,5 β/g riser + (1 - β))/g riser 0 0,1 0,2 0,3 0,4 0,5 0,6 β = G t.u /G riser 1- β = G b /G riser 1,0 0,9 0,8 0,7 0,6 0,5 0,4 0,3 0,2 0,1 0
22 Installation of a bypasse Breaking force F Snap Snap Breaking force F δ 1 δ 2 Different thread pitches 22 Heating Solutions
23 T-shape NEW MODERNIZATION of П shape OLD systems t sup 1 pipe classic NEW П shape OLD t ret t ret t sup t ret П shape NEW??? 2-pipe NEW t sup t ret t sup t ret t sup t ret t sup t ret 23 Heating Solutions
24 ДБН В :2013 HEATING, VENTILATION AND CONDITIONING Recommendations for П-shape systems: a) modernize to T-shape or to 1 pipe classic one-pipe systems or to 2- pipe systems if an old system with heat emitters of 150 mm height; b) use heat radiators/convectors of low height; c) guarantee flowing of heat-carrier into radiators after all possible regulation regimes; d) guarantee Pmin for bypasses on uprise; e) slow raise heat-carrier temperature during start system after sudden stopping. BOUNDARY CONDITIONS Radiator heat emission Qmin [W] and Qmax [W] coef. β Radiator hanging effect Pmin [Pa] and Gmin [kg/h] Radiator back-flow effect Qmin [W] for HCA Airlocking effect ⱱmin [m/s] and Gmin [kg/h] Noise TRV, ABV, pipe ⱱmax [m/s]; ζmax; Gmax [kg/h] 24 Heating Solutions
25 25 Heating Solutions Many thanks for your kind attention!
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