Norrbotten County Council´s patient hostel at Sunderby hospital
Implementation concept submitted by: Nenet
Region: Norrbotten, Sweden
Type of building
Kind of public use: Patient Hostel
Total effective area: 5.500 m2
Number of levels above earth: 4
Source of energy for heating: District heating
Type of heating system: Radiator heating elements
Type of water heating system: Heat exchanger / district heating
Type of ventilation system: FTX (incl. waste heat recycling) and Variable Air Volume
Owner and costs
Name of owner: County Council Norrbotten
Date of construction: 2013-2014
Financing resources: public money
Short description of the pilot project
The County Council Norrbotten is one of the biggest building owners in the county. Sunderby is one of 5 hospitals owned and managed by the County Council Norrbotten. The actual project is about building a hotel linked to the hospital for relatives of the patients of the hospital.
According to calculation, the energy demand will be about 95 kWh/m2 compared to building code of 160 kWh/m2. At least 50% renewable energy will be used. To achieve a highly energy efficient building also from a holistic point of view and to limit climate impacts, primary energy demand is taken into account while calculating energy demand. In contrary to what is usual, no electric heating is used and electricity meters will be installed several separated activity areas and where appropriate also water flow meters.
The building envelope is planned with high air tightness, and leak testing will be done according to EN 13829 for the finished building and will even be part of the final inspection. Thermal imaging of the building envelope will be done in accordance with EN 13187 as part in the final inspection. Leak testing will also be done during construction period before the surface layers are in place and attic floor is insulated.
An energy coordinator has been appointed to ensure that functional requirements are met during the building process. Involved craftsmen will be informed and trained to ensure that the energy targets are met. A kick-off meeting is held to involve all parties of the building process. Estimated life cycle cost using the MSR / BELOK ‘s program will be criteria for selection of construction equipment or property.
Quality of location and facilities
The County of Norrbotten is sparsely populated and distances are long. The Sunderby hospital is one main hospital and patients are coming from all over Norrbotten. There are both train and a lot of public bus connections to the hospital.
Process and planning quality
a) Decision making and determination of goals
The current building project started with definition of general rules and principles regarding energy efficiency and renewable energy use. This is based on a joint project of several County Councils (Västerbottens, Jämtland, Västernorrland) on definition of basic criteria for energy demands of buildings and on the County Council’s energy strategy. MountEE project has provided input based on WP2 results, WP4 criteria and RCC’s feedback. This work lead to a determination of goals, which are in line with MountEE pilot buildings criteria.
b) Objectives for energetic measures
– Target level: 95 kWh/m2 compared to building code of 160 kWh/m2.
– At least 50% use of renewable energies
– Use of environmental-friendly building materials
– Use of LCC and Belok methodology
c) Standardized calculation of economic efficiency
Lifecycle costs are the basis to choose materials, components and even for the whole project, following Swedish Energy Agency model.
d) Product management – use of low emission products
– Low emission products will be used if available and economic.
– MountEE has contributed by providing information about database, criteria etc.
– Follow-up will be done even taking into account information from staff and guests.
e) Planning support for energetic optimization
– There is a space allocation plan as well as a plan of air-flows.
– Heat gains from solar energy, operating units and people are taken into account, heat losses are minimized to max 25%.
– Values for internal heat loads and use of hot water chosen according to standard average values.
– There is a responsible person for all energy related questions, and a controlling mechanism has been developed to ensure that targets are met. All stakeholder/companies were informed in the beginning of the project about energy targets and specific procurement rules.
f) Information for users
– MountEE will support the project to develop concepts how to involve and inform user and staff.
A detailed comparison of actual consumption with the predicted demand values as a basis for any readjustments of the technical systems is planned.
Implementation of service package
The following parts of the Service Package will be used
– Realization: support of craftsmen, material control, product declaration
– Control of success
– Service and maintenance
How the Service Package in general can be transferred to Sweden is part of the ongoing MountEE work and still under investigation. The application of the method to the actual pilot building will be updated according to the general Swedish approach.
a) Specific heating and hot water demand
Hot water: 2,6 W/m2
Heat gains from person: 1 W/m2
Solar reflection: 20%
b) Specific ventilation demand
Ventilation (LB01) 3800 l/s, 75% operating time per day, 75% waste heat gains.
Ventilation (SFB) 1,5 kw/(m3/s), 100% operating time per day.
Ventilation is demand-responsive.
Cooling: Use of heat pump (river water)
c) Specific lighting demand
Highly energy efficient lighting systems, where possible LED, depending on type of use from 6W/m2 (e.g. corridor) to 8W/m2 (offices) to 12W/m2. Use of daylight where possible, use of light colors in the building, motion detectors.
d) Renewable energy
The County Council is in a process of discussing direct involvement in renewable energy projects, so far district heating based using waste heat and bioenergy is used at the hospital.
Health and comfort
– Thermal comfort in summer is guaranteed by design of the building, shadowing possibility and ventilation.
– Thermal comfort in general by well insulated walls minimizing temperature differences.
– Health aspects are taken into account by using specific database within procurement process and implementation of general rules e.g. regarding allergic people etc.
– For ventilation, health aspects will be taken into account in procurement.
Building materials and constructions
– A general policy has been adopted regarding a holistic view on the impacts of buidlings;
– All choice of material and technical appliances are done based on the general demand specifications made.
Test of special methods
Evaluation and follow up
Support for pilot:
1) Sharing information with County Council building team, e.g. from WP2 Best Practice examples;
2) Facilitating continuously exchange of information with MountEE Regional Cooperation Committee;
3) Capacity building for staff, building company and project leaders following concrete demands from the pilot;
4) Implementation of an adapted version of the Austrian Service Package, module 5;
5) Coaching and consultancy on concrete questions and problems in the actual building project;
6) Offering contact and network for discussion questions and experience exchange with international experts;
7) Evaluation of actual project and compiling lessons learnt;
8) Documenting building process in terms of sustainable building and publishing results.
According to the joint evaluation guidelines and using interviews with the involved parties in the project as well as the continuous discussion of the project by the RCC.