SVENSK STANDARD SS-ISO 11855-4:2012 Fastställd/Approved: 2012-09-03 Publicerad/Publised: 2012-09-07 Utgåva/Edition: 1 Språk/Language: engelska/englis ICS: 91.040.01 Byggnadsprojektering med miljöänsyn Projektering, dimensionering oc reglering av inbyggda strålningsverkande värme- oc kylsystem Del 4: Dimensionering oc beräkning av den dynamiska värmeoc kylkapaciteten i Termo-Active Building Systems (TABS) (ISO 11855 4:2012, IDT) Building environment design Design, dimensioning, installation and control of embedded radiant eating and cooling systems Part 4: Dimensioning and calculation of te dynamic eating and cooling capacity of Termo Active Building Systems (TABS) (ISO 11855 4:2012, IDT)
Standarder får världen att fungera SIS (Swedis Standards Institute) är en fristående ideell förening med medlemmar från både privat oc offentlig sektor. Vi är en del av det europeiska oc globala nätverk som utarbetar internationella standarder. Standarder är dokumenterad kunskap utvecklad av framstående aktörer inom industri, näringsliv oc samälle oc befrämjar andel över gränser, bidrar till att processer oc produkter blir säkrare samt effektiviserar din verksamet. Delta oc påverka Som medlem i SIS ar du möjliget att påverka framtida standarder inom ditt område på nationell, europeisk oc global nivå. Du får samtidigt tillgång till tidig information om utvecklingen inom din bransc. Ta del av det färdiga arbetet Vi erbjuder våra kunder allt som rör standarder oc deras tillämpning. Hos oss kan du köpa alla publikationer du beöver allt från enskilda standarder, tekniska rapporter oc standardpaket till andböcker oc onlinetjänster. Genom vår webbtjänst e-nav får du tillgång till ett lättnavigerat bibliotek där alla standarder som är aktuella för ditt företag finns tillgängliga. Standarder oc andböcker är källor till kunskap. Vi säljer dem. Utveckla din kompetens oc lyckas bättre i ditt arbete Hos SIS kan du gå öppna eller företagsinterna utbildningar kring inneåll oc tillämpning av standarder. Genom vår näret till den internationella utvecklingen oc ISO får du rätt kunskap i rätt tid, direkt från källan. Med vår kunskap om standarders möjligeter jälper vi våra kunder att skapa verklig nytta oc lönsamet i sina verksameter. Vill du veta mer om SIS eller ur standarder kan effektivisera din verksamet är du välkommen in på www.sis.se eller ta kontakt med oss på tel 08-555 523 00. Standards make te world go round SIS (Swedis Standards Institute) is an independent non-profit organisation wit members from bot te private and public sectors. We are part of te European and global network tat draws up international standards. Standards consist of documented knowledge developed by prominent actors witin te industry, business world and society. Tey promote cross-border trade, tey elp to make processes and products safer and tey streamline your organisation. Take part and ave influence As a member of SIS you will ave te possibility to participate in standardization activities on national, European and global level. Te membersip in SIS will give you te opportunity to influence future standards and gain access to early stage information about developments witin your field. Get to know te finised work We offer our customers everyting in connection wit standards and teir application. You can purcase all te publications you need from us - everyting from individual standards, tecnical reports and standard packages troug to manuals and online services. Our web service e-nav gives you access to an easy-to-navigate library were all standards tat are relevant to your company are available. Standards and manuals are sources of knowledge. We sell tem. Increase understanding and improve perception Wit SIS you can undergo eiter sared or in-ouse training in te content and application of standards. Tanks to our proximity to international development and ISO you receive te rigt knowledge at te rigt time, direct from te source. Wit our knowledge about te potential of standards, we assist our customers in creating tangible benefit and profitability in teir organisations. If you want to know more about SIS, or ow standards can streamline your organisation, please visit www.sis.se or contact us on pone +46 (0)8-555 523 00
Den internationella standarden ISO 11855-4:2012 gäller som svensk standard. Detta dokument inneåller den officiella engelska versionen av ISO 11855-4:2012. Te International Standard ISO 11855-4:2012 as te status of a Swedis Standard. Tis document contains te official version of ISO 11855-4:2012. Copyrigt / Uppovsrätten till denna produkt tillör SIS, Swedis Standards Institute, Stockolm, Sverige. Användningen av denna produkt regleras av slutanvändarlicensen som återfinns i denna produkt, se standardens sista sidor. Copyrigt SIS, Swedis Standards Institute, Stockolm, Sweden. All rigts reserved. Te use of tis product is governed by te end-user licence for tis product. You will find te licence in te end of tis document. Upplysningar om sakinneållet i standarden lämnas av SIS, Swedis Standards Institute, telefon 08-555 520 00. Standarder kan beställas os SIS Förlag AB som även lämnar allmänna upplysningar om svensk oc utländsk standard. Information about te content of te standard is available from te Swedis Standards Institute (SIS), telepone +46 8 555 520 00. Standards may be ordered from SIS Förlag AB, wo can also provide general information about Swedis and foreign standards. Denna standard är framtagen av kommittén för Installationer, SIS / TK 189 / AG 3. Har du synpunkter på inneållet i den är standarden, vill du delta i ett kommande revideringsarbete eller vara med oc ta fram andra standarder inom området? Gå in på www.sis.se - där ittar du mer information.
SS-ISO 11855-4:2012 (E) ISO 11855-4:2012(E) Contents Page Foreword... iv Introduction... v 1 Scope... 1 2 Normative references... 1 3 Terms and definitions... 1 4 Symbols and abbreviations... 1 5 Te concept of Termally Active Surfaces (TAS)... 6 6 Calculation metods... 11 6.1 General... 11 6.2 Roug sizing metod... 12 6.3 Simplified sizing by diagrams... 13 6.4 Simplified model based on finite difference metod (FDM)... 19 6.4.1 Cooling system... 20 6.4.2 Hydraulic circuit and slab... 20 6.4.3 Room... 22 6.4.4 Limits of te metod... 24 6.5 Dynamic building simulation programs... 25 7 Input for computer simulations of energy performance... 25 Annex A (informative) Simplified diagrams... 26 Annex B (normative) Calculation metod... 31 B.1. Pipe level... 31 B.2. Termal nodes composing te slab and room... 31 B.3. Calculations for te generic -t our... 35 B.4 Sizing of te system... 41 Annex C (informative) Tutorial guide for assessing te model... 42 Annex D (informative) Computer program... 44 Bibliograpy... 52 ISO 2012 All rigts reserved iii
SS-ISO 11855-4:2012(E) (E) Foreword ISO (te International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). Te work of preparing International Standards is normally carried out troug ISO tecnical committees. Eac member body interested in a subject for wic a tecnical committee as been establised as te rigt to be represented on tat committee. International organizations, governmental and non-governmental, in liaison wit ISO, also take part in te work. ISO collaborates closely wit te International Electrotecnical Commission (IEC) on all matters of electrotecnical standardization. International Standards are drafted in accordance wit te rules given in te ISO/IEC Directives, Part 2. Te main task of tecnical committees is to prepare International Standards. Draft International Standards adopted by te tecnical committees are circulated to te member bodies for voting. Publication as an International Standard requires approval by at least 75 % of te member bodies casting a vote. Attention is drawn to te possibility tat some of te elements of tis document may be te subject of patent rigts. ISO sall not be eld responsible for identifying any or all suc patent rigts. ISO 11855-4 was prepared by Tecnical Committee ISO/TC 205, Building environment design. ISO 11855 consists of te following parts, under te general title Building environment design Design, dimensioning, installation and control of embedded radiant eating and cooling systems: Part 1: Definition, symbols, and comfort criteria Part 2: Determination of te design and eating and cooling capacity Part 3: Design and dimensioning Part 4: Dimensioning and calculation of te dynamic eating and cooling capacity of Termo Active Building Systems (TABS) Part 5: Installation Part 6: Control Part 1 specifies te comfort criteria wic sould be considered in designing embedded radiant eating and cooling systems, since te main objective of te radiant eating and cooling system is to satisfy termal comfort of te occupants. Part 2 provides steady-state calculation metods for determination of te eating and cooling capacity. Part 3 specifies design and dimensioning metods of radiant eating and cooling systems to ensure te eating and cooling capacity. Part 4 provides a dimensioning and calculation metod to design Termo Active Building Systems (TABS) for energy-saving purposes, since radiant eating and cooling systems can reduce energy consumption and eat source size by using renewable energy. Part 5 addresses te installation process for te system to operate as intended. Part 6 sows a proper control metod of te radiant eating and cooling systems to ensure te maximum performance wic was intended in te design stage wen te system is actually being operated in a building. iv ISO 2012 All rigts reserved
SS-ISO 11855-4:2012(E) Introduction Te radiant eating and cooling system consists of eat emitting/absorbing, eat supply, distribution, and control systems. Te ISO 11855 series deals wit te embedded surface eating and cooling system tat directly controls eat excange witin te space. It does not include te system equipment itself, suc as eat source, distribution system and controller. Te ISO 11855 series addresses an embedded system tat is integrated wit te building structure. Terefore, te panel system wit open air gap, wic is not integrated wit te building structure, is not covered by tis series. Te ISO 11855 series sall be applied to systems using not only water but also oter fluids or electricity as a eating or cooling medium. Te object of te ISO 11855 series is to provide criteria to effectively design embedded systems. To do tis, it presents comfort criteria for te space served by embedded systems, eat output calculation, dimensioning, dynamic analysis, installation, operation, and control metod of embedded systems. ISO 2012 All rigts reserved v
SS-ISO 11855-4:2012 (E)
SS-ISO 11855-4:2012 (E) Building environment design Design, dimensioning, installation and control of embedded radiant eating and cooling systems Part 4: Dimensioning and calculation of te dynamic eating and cooling capacity of Termo Active Building Systems (TABS) 1 Scope Tis part of ISO 11855 allows te calculation of peak cooling capacity of Termo Active Building Systems (TABS), based on eat gains, suc as solar gains, internal eat gains, and ventilation, and te calculation of te cooling power demand on te water side, to be used to size te cooling system, as regards te ciller size, fluid flow rate, etc. Tis part of ISO 11855 defines a detailed metod aimed at te calculation of eating and cooling capacity in non-steady state conditions. Te ISO 11855 series is applicable to water based embedded surface eating and cooling systems in residential, commercial and industrial buildings. Te metods apply to systems integrated into te wall, floor or ceiling construction witout any open air gaps. It does not apply to panel systems wit open air gaps wic are not integrated into te building structure. Te ISO 11855 series also applies, as appropriate, to te use of fluids oter tan water as a eating or cooling medium. Te ISO 11855 series is not applicable for testing of systems. Te metods do not apply to eated or cilled ceiling panels or beams. 2 Normative references Te following referenced documents are indispensable for te application of tis document. For dated references, only te edition cited applies. For undated references, te latest edition of te referenced document (including any amendments) applies. ISO 11855-1, Building environment design Design, dimensioning, installation and control of embedded radiant eating and cooling systems Part 1: Definition, symbols, and comfort criteria 3 Terms and definitions For te purposes of tis document, te terms and definitions in ISO 11855-1 apply. 4 Symbols and abbreviations For te purposes of tis part of ISO 11855, te symbols and abbreviations in Table 1 apply: ISO 2012 All rigts reserved 1
SS-ISO 11855-4:2012(E) (E) Table 1 Symbols and abbreviations Symbol Unit Quantity A F m 2 Area of te eating/cooling surface area A W m 2 Total area of internal vertical walls (i.e. vertical walls, external façades excluded) C J/(m 2 K) Specific termal capacity of te termal node under consideration C W J/(m 2 K) Average specific termal capacity of te internal walls c j J/(kg K) Specific eat of te material constituting te j-t layer of te slab c w J/(kg K) Specific eat of water d a m External diameter of te pipe E Day kw/m 2 Specific daily energy gains f rm - Running mode (1 wen te system is running; 0 wen te system is switced off) in te -t our f s - Design safety factor F v F-C - View factor between te floor and te ceiling F v F-EW - View factor between te floor and te external walls F v F-W - View factor between te floor and te internal walls A-C W/(m 2 K) Convective eat transfer coefficient between te air and te ceiling A-F W/(m 2 K) Convective eat transfer coefficient between te air and te floor A-W W/(m 2 K) Convective eat transfer coefficient between te air and te internal walls F-C W/(m 2 K) Radiant eat transfer coefficient between te floor and te ceiling F-W W/(m 2 K) Radiant eat transfer coefficient between te floor and te internal walls H A H C W/K W/K Heat transfer coefficient between te termal node under consideration and te air termal node ( A ) Heat transfer coefficient between te termal node under consideration and te ceiling surface termal node ( C ) H Circuit W/K Heat transfer coefficient between te termal node under consideration and te circuit H CondDown W/K Heat transfer coefficient between te termal node under consideration and te next one H CondUp W/K Heat transfer coefficient between te termal node under consideration and te previous one H Conv - Fraction of internal convective eat gains acting on te termal node under consideration H F W/K Heat transfer coefficient between te termal node under consideration and te floor surface termal node ( F ) H Inertia W/K Coefficient connected to te inertia contribution at te termal node under consideration H IWS W/K Heat transfer coefficient between te termal node under consideration and te internal wall surface termal node ( IWS ) H Rad - Fraction of total radiant eat gains impinging on te termal node under consideration t W/(m 2 K) Total eat transfer coefficient (convection + radiation) between surface and space J - Number of layers constituting te slab as a wole 2 ISO 2012 All rigts reserved
SS-ISO 11855-4:2012(E) Symbol Unit Quantity J 1 - Number of layers constituting te upper part of te slab J 2 - Number of layers constituting te lower part of te slab L R m Lengt of installed pipes m H,sp kg/(m 2 s) Specific water flow in te circuit, calculated on te area covered by te circuit m j - Number of partitions of te j-t layer of te slab n - Actual number of iteration in iterative calculations n Number of operation ours of te circuit n Max - Maximum number of iterations allowed in iterative calculations Max, P Circuit W Maximum cooling power reserved to te circuit under consideration in te -t our Max P Circuit,Spec W/m 2 Maximum specific cooling power (per floor square metre) q i W/m 2 Inward specific eat flow q u W/m 2 Outward specific eat flow Q C W Heat flow impinging on te ceiling surface ( C ) in te -t our Q Circuit W Heat flow extracted by te circuit in te -t our Q Conv W Total convective eat gains in te -t our Q F W Heat flow impinging on te floor surface ( F ) in te -t our Q IntConv W Internal convective eat gains in te -t our Q IntRad W Internal radiant eat gains in te -t our Q IWS W Heat flow impinging on te internal wall surface ( IWS ) in te -t our Q PrimAir W Primary air convective eat gains in te -t our Q Rad W Total radiant eat gains in te -t our Q Sun W Solar eat gains in te room in te -t our Q Transm W Transmission eat gains in te -t our Q W W/m 2 Average specific cooling power R (m 2 K)/W Generic termal resistance R Add C (m 2 K)/W Additional termal resistance covering te lower side of te slab R Add F (m 2 K)/W Additional termal resistance covering te upper side of te slab RCAC RCAF RCAW K/W K/W K/W Convection termal resistance connecting te air termal node ( A ) wit te ceiling surface termal node ( C ) Convection termal resistance connecting te air termal node ( A ) wit te floor surface termal node ( F ) Convection termal resistance connecting te air termal node ( A ) wit te internal wall surface termal node ( IWS ) ISO 2012 All rigts reserved 3