Technical data

www.dimplex.de 01.2012 | Project planning manual for heat pumps for heating and domestic hot water preparation | 1
Table of contents
Table of contents
What are the benefits of a heat pump? ..................................................................................................................5
Glossary....................................................................................................................................................................5
Literature...................................................................................................................................................................7
Symbols ....................................................................................................................................................................7
Energy content of various types of fuel.................................................................................................................8
Conversion tables ....................................................................................................................................................8
1 Selection and design of heat pumps ..............................................................................................................10
1.1 Design of existing heating systems – heat pumps for the renovation market ................................................................................. 10
1.1.1 Heat consumption of the building to be heated ..................................................................................................................... 10
1.1.2 Determining the required flow temperature ........................................................................................................................... 10
1.1.3 Which renovation measures must be carried out for energy-saving heat pump operation? ................................................. 12
1.1.4 Choice of heat source (renovation) ....................................................................................................................................... 12
1.2 Heat pumps for new systems.......................................................................................................................................................... 13
1.2.1 Calculating the heat consumption of the building .................................................................................................................. 13
1.2.2 Determining the flow temperatures........................................................................................................................................ 13
1.2.3 Choice of heat source............................................................................................................................................................ 13
1.3 Additional power requirements........................................................................................................................................................ 13
1.3.1 Utility company shut-off times................................................................................................................................................ 13
1.3.2 Domestic hot water preparation............................................................................................................................................. 14
1.3.3 Swimming pool water heating................................................................................................................................................ 14
1.3.4 Determining the heat pump output ........................................................................................................................................ 15
2 Air-to-water heat pumps...................................................................................................................................18
2.1 Air as heat source ........................................................................................................................................................................... 18
2.2 Air-to-water heat pumps for outdoor installation ............................................................................................................................. 19
2.2.1 Parallel connection of air-to-water heat pumps installed outdoors. ....................................................................................... 20
2.2.2 Connection on the heating side............................................................................................................................................. 20
2.2.3 Wall opening.......................................................................................................................................................................... 21
2.3 Air-to-water heat pump for indoor installation ................................................................................................................................. 22
2.3.1 Requirements placed on the installation location .................................................................................................................. 22
2.3.2 Air intake or air outlet via light wells ...................................................................................................................................... 23
2.3.3 Heat pump rain guard............................................................................................................................................................ 23
2.3.4 Insulation of wall openings .................................................................................................................................................... 23
2.3.5 Air duct hose kit for air-to-water heat pumps......................................................................................................................... 24
2.3.6 Lightweight cement based fibre glass air ducts for air-to-water heat pumps (indoor installation) ......................................... 24
2.3.7 Dimensioning the air circuit with lighweight cement based fibre glass air ducts ................................................................... 25
2.4 Air-to-water heat pump in split design............................................................................................................................................. 29
2.4.1 Installation ............................................................................................................................................................................. 29
2.4.2 Dimensioning......................................................................................................................................................................... 30
2.4.3 Hydraulic integration.............................................................................................................................................................. 33
3 Brine-to-water heat pump ................................................................................................................................34
3.1 Ground as a heat source................................................................................................................................................................. 34
3.1.1 Dimensioning information - ground heat source.................................................................................................................... 34
3.1.2 Drying out buildings ............................................................................................................................................................... 35
3.1.3 Brine fluid............................................................................................................................................................................... 35
3.1.4 Parallel connection of brine-to-water heat pumps ................................................................................................................. 36
3.2 Ground heat collector...................................................................................................................................................................... 36
3.2.1 Installation depth ................................................................................................................................................................... 37
3.2.2 Clearance .............................................................................................................................................................................. 37
3.2.3 Collector surface and pipe length.......................................................................................................................................... 37
3.2.4 Brine collector and brine circuit manifold installation............................................................................................................. 38
3.2.5 Installation of the brine circuit ................................................................................................................................................ 39
3.2.6 Standard dimensioning of ground heat collectors. ................................................................................................................ 41
3.3 Borehole heat exchangers .............................................................................................................................................................. 43
3.3.1 Design of borehole heat exchangers..................................................................................................................................... 43