Mine water as a Renewable Energy Resource - Promoscene

3.1.7 Buildings designed for low temperature
heating and high temperature cooling
The buildings themselves are designed to have a low
heating and cooling demand. Specifically, this involves
constructing the buildings with very good thermal
insulation and small ventilation losses, integrating
mechanical ventilation with heat recovery, and limiting
summer solar gains by means of effective shading. The
characteristics of the buildings are summarised in Table 3.3.
Limiting the heating and cooling demands in this way means
that most of the remaining demand can theoretically be
met by low exergy sources (this means heat demand is
met by means of a low temperature heat supply, and the
cooling demand by a high temperature cooling supply). It
was estimated that the mine water from different depths
at Heerlen can be used to contribute significantly to these
demands with only small temperature increments (and hence
energy) required from supplementary systems.
Table 3.3: Characteristics of buildings designed for low temperature heating and high temperature cooling
Building Regulation NL Practice 2007 NL Mine water Lowex
Thermal insulation
Envelope Rc = 2.5
Glazing U = 3.0
Ventilation
No system requirements
Air tightness
qv 10 < 200 (n50 = 3)
Emission system
No requirements
HVAC system/efficiency
No requirements (but in EPR)
EPC dwellings
0.8
Heerleheide
EC
HH1
24ºC
Fig 3.5: Schematic view of the energy concept
Thermal insulation
Envelope Rc = 3.0
Glazing U = 1.5
Ventilation
50% ME/50% MVHR
Air tightness
qv 10 = 100..150
Emission system
Radiators
HVAC system/efficiency
Condensing boilers
Efficiency = 95%
No cooling
EPC dwellings
0.8
Thermal insulation
Envelope Rc = 4.0
Glazing U = 1.2
Ventilation
MVHR efficiency = 95%
Air tightness
qv 10 < 62.5 (n50