certus_cost_eff

EXAMPLES OF RENOVATION DESIGNS
PRODUCED IN THE PROJECT CERtuS

SATELLITE PALACE- MESSINA ITALY

BUILDING CURRENT CONDITION – TECHNICAL AND OTHER PROBLEMS DETECTED

italy-satelite-palace

The building was built for residential use and each floor hosts several residential units / apartments. This residential building typology has been converted in office and public space without any planning or adaptation. Furthermore, the building even if it is owned and managed by one entity (the municipality), is subdivided into individual office suites (originally residential units) and is in use by organisations of different size, needs and business types. This results in areas with favourable, less favourable and poor indoor environment and further complicates the physics and the overall performance of the building. Besides, some characteristics and technical standards of the building contribute to its poor thermal performance. The orientation is not favourable demanding high heating energy consumption during the winter (supplementary in the north exposition) and high cooling energy consumption during the summer. In addition the facades do not have any protection from solar radiation. The external walls have a medium thermal inertia with over-media ceiling height, this aspect increases the envelope energy thermal response during the summer, but causes disadvantages during the winter. Still, the windows are the old type with a single glazing and aluminium frames and present insulation problems and limited air tightness. The building presents many pathologies, such as condensation and mould.

ECONOMIC, FINANCIAL AND LEGISLATIVE CONSTRAINS

BRIEF DESCRIPTION

Economic/Financial Risks
The municipality has no specific financing to improve public buildings. There are therefore serious difficulties to undertake energy improvements. The Administration is trying to raise funds from national and regional funding programs.
Legislative Obstacles
There are no legislative obstacles to the renovation of this building.
Palazzo Satellite is a municipal building of Messina. The building is located in the historic centre of the city, near the central station. The building includes many functions of municipal government, including the Local Health Unit, the municipal Police management and several Municipal Departments.Building style is modern; it is an example of a frame structure made of reinforced concrete. The walls are made of masonry and the floors are in slab and masonry. The building is constituted of 5 floors above ground. The dimensions are the same for each floor.The building is usually in use between 0h00 and 24h00 from Monday to Sunday only for the municipal police management. The public activities of employees are carried out only between 7h30 and 19h30. The building hosts about 200 employees and it is visited by an indeterminate number of public.

RENOVATION SCHEME

Building Envelope: Opaque Envelope: among the actions planned, there is the facades renovation, it is planned to ensure the safety of unsafe parts and, where necessary, to do an important refurbishment. Another change concerns the reconstruction of the plaster of the facades, using a thermal insulation plaster. Among other interventions there is waterproofing of the roof, so it is expected to enter under the floor of a fibre-reinforced bituminous membrane.  Glazing: also, the existing glazing and frames will be replaced selective glazing and thermal break frame in PVC. Regarding the frames is chosen to include window frames with thermal break. It is chosen to use windows with PVC frames. Glasses chosen are selective double glazing with air chamber 6/13 mm.

HVAC: Almost all working rooms, have air conditioning systems. It is expected to insert a false ceiling in all circulation areas and, where possible in all rooms of the building. The result is a decrease in the net height of the rooms to be heated and creation of a channel for heating and lighting installations.

Lighting:It is expected to replace the existing lighting with the introduction of LED lamps and, where possible, to insert intelligent dimmerable systems.

RES: The choice is the installation of a PV system with120 kWp. This ensures about 84% of post renovation consumption of electricity.

Passive solar gains/insulation: it is foreseen a green roof that will give two great advantages: (i) it will decrease heat loss during winter season working as thermal insulation, (ii)  it will hinder heat input during summer season working as a reflecting system for sunlight.

Energy management system: a centralised Building Automation Control System (BACS) is foreseen to control the building’s heating, cooling and ventilation, lighting and other systems through a Building Management. This distributed system includes networked computers, all electronic devices useful to control security, lighting in general and emergency lights as well rooms’ humidity and temperature.

Equipments: The envisaged interventions are divided into three types: (i). staff’s training to a rational use of office equipment; (ii). purchases regulated by Green Public Procurement (GPP model), by providing clear environmental criteria for products and services and giving a favourable evaluation to the products with better energy class; (iii) control systems which manage, command and regulate the behaviour of other devices or systems.

GENERAL INFORMATION

Year of construction:
1970
Area/Volume:
6.870 m2 (about 1.350 m2 to floor) / 18.550 m3
Building Use :
Municipal Office / City Hall
supp_zanca LEARN MORE:
Link to D2.1 pdf
Link to D2.3 pdf

Link to Guide or Brochure
certus_cost_eff

EXAMPLES OF RENOVATION DESIGNS
PRODUCED IN THE PROJECT CERtuS

SATELLITE PALACE – MESSINA ITALY

RENOVATION SCHEME EVALUATION

Energy Savings
The energy consumption before renovation is equal to 340,626 kWh/year and the energy consumption on square meter is equal to 50 kWh/m2 yearly. The energy consumption savings are equal to 308,557 kWh/year, that means an energy expenditure saving of 55,540 Euro/year.CO2 Savings
The CO2 savings are 98,545 tons/year.

RES Integration
The potential integration of RES was investigated and several options were considered.  The optimum choice regards the installation of photovoltaic systems on the roof and on the walls of the building.  The installed capacity will be 120 kWp with an estimated PV total saving 168,000 kWh.

PARAMETERS OF THE RENOVATION SCHEME- TOTAL

Energy Savings 308,577 kWh
Costs 1,629,738 €
Savings 54,942 €/year
Simple Payback 29 years
CO2 Savings 98,545 tons/year

ECONOMIC EVALUATION

Renovations cost
The refurbishment investment cost is equal to 1,629,738 Euro (excluded VAT), that means an investment cost per square meter of 237.2 Euro/m2.

Economic Savings
The energy expenditure saving is 55,540 Euro/year.
The maintenance expenditure post renovation is higher than before by 598 Euro/year. This affects negatively, at economic level, on the total savings achievable by the intervention and also on the payback period. In facts, the economic saving both for energy and maintenance is 54,942 Euro/year.

Project Payback Period
The Project Payback period is very long, 29 years considering the maintenance, and the project cash flows are very low. This situation has a very negative impact on the sustainability of the project and consequentially on the attractiveness for an ESCo.

INVESTMENT FOR RENOVATION – TOTAL

INVESTMENTS
HVAC 500,000
Lighting system (internal) 101,000
Renewable energy 216,000
Casing Building skin 792,538
Control system 20.000
Investment for Renovation 1,629,738
FINANCING SCHEME
Energy Performance Contract
The strategy of Messina’s Municipality is to promote the nZEB concept, despite its inability to financing the needed renovation options under the current tight economic conditions.  Dealing with the expensive renovation of Satellite Palace, the most suitable operational financial scheme corresponds to a solution which combines the use of three types of public/private partnerships EPC contracts, with provision of specific conditions, in order to make the project attractive for the ESCo market.

To make it palatable to the market projects and allow a contract term not exceeding nine years is necessary:

  1. a) reduce the investment value postponing interventions that bring lower energy benefits (see. Table);
  2. b) a contribution from the Municipality on investment;
  3. c) recourse to financing with concessional funds or use of incentives of the Energy Bill.

The project is still not sustainable for an investment of an ESCO.

Duration of EPC
In order to allow the sustainability of the contract in the market is necessary to extend the contract duration at least 15 years.

Financial Sources
The Municipality can directly finance the renovation measures through the National Operational Programme on Italian Metropolitan Cities for an amount of 1.400 k€ that corresponds to approximately 100% of the total investment of the building renovations. The Municipality will recover part of the investment incentives through the ‘Conto Termico 2’.

Other considerations
The total investment of the municipality for the three projects would amount to about 2,000 k € which would be fully covered by the National Operational Programme on Italian Metropolitan Cities.

messinasatelite

SEPARATED INVESTMENTS COST € SAVING €
Waterproofing foundations a 237,168 3,205
supp_zanca LLEARN MORE:
Link to D2.5 pdf
Link to D3.6 pdf
Link to D3.7 pdf