ENERGY MANAGEMENT
Table 2 (continued): List of implemented energy saving projects 1996-2016.
Annual savings Project title
Project topic
Electric energy
2005 Optimisation of operating Optimisation of operating mode
mode for supply area of AC during low load times unit HAZ10*
2007- Optimisation of variable 2014 air volume (VLV) - air conditioning system in building 10
2009 District cooling
2011 Need-based optimisation of heating warm water in building 69*
Reducton of air flow especially outside operating hours by
newly adjusting the facilities and renewing the facility's controls
Service expansion, cost reduction, CO2
100,000 reduction
Expansion of energy monitoring; consumption tracking on
building basis; building benchmark; adjustment of the heating curve
2013 Consumption measuring and Target of electric energy
optimisation of medical large reduction especially concerning equipments
stand-by consumption of new equipment
2013- Energy optimisation of AC Reduction of air volume
2014 unit in building 10 auditorium especially outside normal 3 through CO2
regulation 2013- Development of heating and Target of heating energy
2016 cooling optimisation through reduction for non potable water use of heat pumps
2014- Electronic area regulation
and low temperature heat Reduction of air volume
2015 building 10 in supply area of especially outside normal AC unit HAR70
2015- Increasing energy efficiency Reduction of air volume 2016 through CO2
controlling in
operating hours by newly regulating the systems for air distribution and blow-in
30,000 especially outside normal
building 10 auditoriums 1, 2, operating hours by newly 4, 5, ID792
Total annual savings
regulating the systems for air distribution and blow-in
4589 15,032 2725 *: Re-engineering projects HAZ10, HAR70: Location code with AKH facility identification system 5500 418,800 15,342 7,210,563 50,000
operating hours by newly regulating the systems for air distribution and blow-in
8000 8000 5000 79 19 6650 9,700 3,216,000
MWh 491
Thermal Cooling Humidification Drinking CO2 energy
MWh 0
energy MWh
0
energy MWh
30
water m3
510
tons 190
€
40,300
implemented with little effort and therefore low investment costs. A ranking of optimisation projects
according to the Pareto analysis shows that the first six projects regarding the amount of savings make up around 90% of the total savings (see Table 3). These projects deal mostly with air conditioning and secondly with “technical drinking water”. The feed-in and transformer area for
“technical drinking water” with numerous treatment plants, back flushing systems, pressure boosting plants and safety valves in particular allowed for successful savings.
Examples of projects 2014-2016 The following bullet pointed examples show the most relevant projects in the period 2014-2016 accroding to the achieved efficiency increases:
IFHE DIGEST 2017
l Optimisation of Variable Air Volume (VLV) – air conditioning system in building 10. Energy optimisation of air conditioning in auditorium 3 (building 10), through CO2-regulation. (2007– 2010 completed).
l Electronic area regulation in building 10, supply area of air conditioning system HAR70. Energy efficiency increase through CO2
-regulation in auditoriums 1, 2, 4 and 5 (building 10).
Three smaller projects were set up based on large scale VLV projects: Energy optimisation of air conditioning in auditorium 3 (building 10), through CO2
-regulation (2013-2014 completed),
Electronic area regulation in building 10, supply area of air conditioning system HAR70 (2014-2015 completed), and “Energy efficiency increase through CO2
(building 10) (2015-2016 ongoing project). More detailed information on these
projects follows.
The project scope of optimisation of VLV – air conditioning system in building 10 included: l Air stream – calculations and adjustments in 5,800 rooms
l Adjustments to 18,600 ceiling air outlets
l Adjustments to 8,600 air follow-up treatment systems
l Adjustments to 1,945 horizontal pressure control circuits
l Adjustments to 150 vertical pressure control circuits
l Adjustments to the central units of 44 inlet air and 46 outlet air connected systems
-regulation in auditoriums 1, 2, 4 and 5
l Refitting with electronic humidity control with DDC-technology
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