Take Lead on Your Project with an Efficient System Concept
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Technical handbook | Danfoss EvoFlat systems from A-Z Take lead on your project with an efficient system concept 30% lower energy consumption by individual metering in each apartment www.evoflat.danfoss.com List of content Introduction – An innovative energy Introduction to the product range 3 32 1. concept for buildings 4. – EvoFlat flat stations 1.1 New energy concepts for residential buildings 4 4.1 Product range overview 33 1.2 Documented benefits of EvoFlat systems 5 – Main data and functions 1.2.1 System comparison investments 4.2.1 Termix Novi 34 6 and operating costs 4.2.2 Termix One B 36 1.3 Domestic hot water: Hygiene and high comfort 8 4.3.1 EvoFlat FSS 38 4.4.1 Termix VMTD-F-B 40 2. Why decide for the EvoFlat system? 9 4.5.1 EvoFlat MSS 42 2.1 From traditional central heating to modern 4.6.1 Termix VMTD-F-MIX-B 44 10 decentralized solutions 4.7.1 Termix VVX-I 46 2.2 Comparison with traditional central 12 and decentralized heating systems 4.7.2 Termix VVX-B 48 4.8.1 Performance curve: EvoFlat stations 2.3 Significant benefits with EvoFlat 13 50 - TPC-M controller 4.8.2 Performance curve: Termix stations 53 3. What is the EvoFlat system solution? 14 – IHPT controller 4.8.3 Performance curve: Termix stations 3.1 The function of the EvoFlat station 15 55 – AVTB controller 3.2 Main elements of the decentralized system 16 3.3 Independent of the available energy source 17 5. How to dimension the EvoFlat system? 59 3.4 Hydronic balancing of the EvoFlat system 18 5.1 Dimensioning with EvoFlat software 60 3.5 Design, key components 20 and features of a flat station How to install 62 3.5.1 Brazed plate heat exchangers 21 6. EvoFlat flat stations 3.5.2 Domestic hot water control valve – Introduction 22 Installation examples 62 – Renovation and new buildings Domestic hot water control valve - TPC-M 23 6.1 Dimensions and connections: EvoFlat stations Domestic hot water control valve – IHPT 24 63 – On-wall mounting Domestic hot water control valve 25 – Recess mounting 64 – AVTB with sensor accellerator – Recess mounting with floor heating 3.5.3 Additional flat station components 26 65 distribution unit 3.5.4 Multiple cover options - Termix 27 6.2 Dimensions and connections: Termix stations 66 3.5.5 EvoFlat insulation options – Termix 28 – On-wall or recess mounting 3.5.6 Heat and energy meter 29 – On-wall mounting sequence 68 3.6 Domestic hot water requirements 30 – Recess mounting sequence 69 6.3 Accessories for mounting of flat stations 70 Central control and monitoring 74 7. from heat production to heat use 8. Reference list 76 9. FAQ 78 2 List of content 1. Introduction – An innovative energy concept for residential buildings Fully future compatible EvoFlat systems are compatible with virtually any kind of heat supply infrastructure, and are independent of the type of energy used. 3 Introduction Introduction 1.1 New energy concepts for residential buildings Refurbishment and new buildings Energy efficiency pays off water and distributes it to individual Building renovation and decentralized Millions of apartments worldwide are to apartments. Every apartment has its systems reduce heat losses and heating be renovated every year. Heat insulation own flat station, which as the hydraulic costs. They increase comfort, conven- on roofs and facades, new windows and interface ensures that the heating water ience and domestic water hygiene. At doors can reduce the energy require- is distributed to the individual radia- the same time separate meters in each ments of an apartment building by tors in the apartment at the desired apartment ensure more consumption up to 83%*. Such a significant energy temperature. Each of these flat stations transparency and better control over savings with possible integration of is also fitted with a fresh water system, heating and hot water bills for the renewable energy sources require new which heats the domestic water when tenant. This makes the building more energy concepts – for both renovations is needed, in a sufficient amount and, attractive for all concerned. and new buildings. above all, hygienically safe. Integration of renewable Benefits for all energy sources Decentralized heating systems in new Regardless of whether it is an existing buildings and renovation projects offer building renovation or a new building, many benefits for both investor and alternative energy sources require a tenant. buffer tank, which collects the heated * Source: dena (German Energy Agency), 2010 4 Introduction 5 Introduction 1.2 Documented benefits of EvoFlat systems Low overall costs The idea behind the decentralized The main benefits with decentralized houses, and reductions in the amount of system for heating and domestic hot systems include lower energy consump- heat wasted in long pipe runs. Here are water is not new, and the advantages tion as a result of individual metering, some factual numbers. and benefits of opting for such systems more revenue-generating space in are well documented. apartment blocks and multi-family Encourage people to save on energy Meters introduced Meters introduced When residents and tenants only pay for what they use, they tend to keep a 25 25 critical eye on their energy consump- tion. A study carried out in Denmark in 20 20 1991-2005 examined the actual energy 2 2 15 15 consumption before and after individual meters were installed. 10 10 MWh/100M MWh/100M 5 5 The results clearly showed that individual 0 0 metering significantly reduces energy 1991 1998 2005 1991 2000 2005 consumption per square metre – normally by as much as 15-30%. Housing association “Hyldespjældet” Housing association “Morbærhaven”, Individual metering since 01.98 Individual metering since 01.00 Reduce energy loss 250 A 2008 study compared the different horizontal riser pipe system with 200 distribution systems available for apart- centralized production of domestic hot ment blocks and multi-family houses. water. The study showed that compared 150 kWh The calculations were based on a to modern centralized domestic hot water 100 4-storey building with eight 133-square- solutions, a EvoFlat solution reduces metre apartments per storey. The fig- heat loss from the pipes by more than 50 ures compared a EvoFlat solution with a 40% and by as much as 80% compared 0 single vertical riser pipe system and a to traditional one-pipe solutions. Single vertical Horizontal pipe EvoFlat pipe system system with central DHW production Take up less space 0.35 As the name suggests, EvoFlat systems Admittedly, flat stations do take up a little 0.3 take up very little space. Compared to more space than centralized systems 0.25 3 0.2 individual gas-fuelled boilers, which are for domestic hot water production, m often combined with a storage tank, a although they are still very unobtrusive. 0.15 flat station takes up about 80% less In return, however, they free up consid- 0.1 space and can normally be mounted in erable amounts of space in basement 0.05 a wall recess or small cupboard. areas. 0 Individual EvoFlat Central gas boiler domestic hot water Individual gas boiler: 0.32. Boiler (0.15 m3) + chimney (0.17 m3) EvoFlat: 0.062. Flat station (0.062 m3) Central domestic hot water: 0.02. Water meter (0.01 m3) + heat meter (0.01 m3) * Storage tank in basement will take up significantly more space than in a EvoFlat solution 5 Introduction Introduction 1.2.1 System comparison investments and operating costs The purchase price is not everything Frequently investment costs are the first by the Kulle & Hofstetter partnership, water heating are lower than the invest- consideration when planning renova- which was compiled for Stadtwerke ments for corresponding decentralized tion or new build. As with an iceberg, München, and with which the central systems. they are the immediately visible part, systems for heating and hot water pro- which, however, only account for a frac- duction were compared with decentral- The 30% higher investment costs for the tion of the overall costs that a product ized systems. decentralized system with decentralized incurs during its entire service life. DHW production pays themselves back Central and decentralized systems within approx. 9 years due to the 70% The lifecycle costs of what appears to comparison lower energy consumption costs. This be a cheaper product at first glance can The below example for renovation of even without considering future price often be significantly higher than those 50 apartments shows that the initial increases for energy and fossil fuels. of an allegedly more expensive variant. investment costs for a traditional central This is also demonstrated in a study heating system with central domestic Renovation cost effectiveness analysis Renovation of 50 apartments Variant 1 Variant 2 Variant 3 Electrical DHW Central DHW Cen- Decentralized DHW boiler in apartment tral heating Central heating Central heating + buffer tank 1. Investment and capital costs 1.1 Investment costs € 0,00 45.596,00 63.867,00 1.2 Capital dependant costs € / a 0,00 3.257,70 5.461,48 Relation to Variant 1 % 0,00 100,00 167,65 2. Consumption related costs 2.1 Heat loss € / a 1.608,14 3.013,23 2.168,33 2.2 Utility heat District heating € / a 8.012,93 8.012,93 2.3 Electricity costs (circulation pumps) € / a 104,09 119,32 2.4 Tariff change € / a 1.146,00 2.5 El. boiler useful heat € / a 15.377,33 Total 18.131,47 11.130,25 10.300,58 Relation to Variant 1 % 100,00 61,39 56,81 3.