Improving energy efficiency of our facilities
Given that the project dates back to the period when it was not necessary to meet the needs for energy efficiency, and considering the amended regulations today, doc Dr. Alexander Tomatoes, from the Faculty of Architecture, commissioned a study of energy efficiency, the parameters that affect energy efficiency per project, with a proposal to improve these parameters, and the gains to be achieved, and subsequent results.
The old parameters that affect the energy efficiency of the facility are:
1. Facade thermo isolation, styrofoam d=5 cm
2. Flat roof thermo isolation, tervol d=10 cm
3. The three chamber PVC profiles
4. Termopan usually glass (double glass with air gap, 4+12+4)
5. Thermo isolation terrace above the third floor space heating, hard polystyrene d=5 cm
6. Skylight in the staircase, with the blinds open at the top
7. Other, less important parameters
The old parameters that affect the energy efficiency of the facility are:
1. Facade thermo isolation, styrofoam d=5 cm
2. Flat roof thermo isolation, tervol d=10 cm
3. The three chamber PVC profiles
4. Termopan usually glass (double glass with air gap, 4+12+4)
5. Thermo isolation terrace above the third floor space heating, hard polystyrene d=5 cm
6. Skylight in the staircase, with the blinds open at the top
7. Other, less important parameters
The calculation was made under the new regulations on energy efficiency (the by-law rules applicable law on planning and construction, the application of which will be mandatory from September 2012., Under which the building will not be able to obtain a use permit if it does not meet the requirements prescribed by these Rules).
The budget for this policy is included in the geographical position of the object and the subject's position in space relative to adjacent structures (its exposure to sunlight and heat gain from the sun), heat gain from the heat of human bodies, presumed loss of natural ventilation.
The obtained quantitative results are as follows:
The obtained result is a class D of energy, the consumption of heat Qh/A = 81.40 kWh/m2, which is a devastating result, that this facility ranked in a category that does not meet the criteria prescribed by the new regulations (for new facilities the energy minimum of C grade with the required heat energy consumption ranging from 30 to 60 kWh/m2). Despite the fact that this object will not be necessary to meet the rigorous requirements of the new regulation on electricity, it will be completed and handed over to the official before the implementation of the new rules (September 2012), the decision of investors is that given the interest of prospective users of the facility, due to the adopted principles of construction with emphasis on energy efficiency, smart fixtures and ecological construction, as well as overall business philosophy of the company, make energy efficiency improvements. Improvements were made in the descriptive text below:
1. Facade thermo isolation, styrofoam d=12 cm
2. Flat roof thermo isolation, tervol d=30 cm
3. The fifth chamber PVC profiles for doors and windows facade
4. Thermopane glass with an inert gas argon (double glass with air gap, 4+12+4). Low-emission coating film on the glass on the
inside.
5. Thermo isolation terrace above the third floor space heating, hard polystyrene d=15 cm
6. Skylight in the staircase, with the blinds open at the top is reversed, it will be installed instead of two Velux windows with
tempered glass and the possibility of opening the remote control.
7. Other, less important parameters are also improved.
Budget with improved parameters that influence the EE under the new regulations on EE obtained quantitative results are as follows:
The obtained result is the energy class C, with a consumption of heat Qh / A = 55.71 kWh/m2, which is quite a good result, considering the type of facility with a 35% glass surfaces. In relation to the originally planned, the result is improved by 30%.
We note that the higher energy classes at least according to these regulations, are reserved for other types of objects, which are powered in part from renewable energy sources (solar, geothermal energy, heat pumps, etc.).. This type of objects, it is questionable maintenance (cost-sharing) facility during the period of exploitation, in the case of our facility, where there is infrastructure in Novi Sad district heating plants (which will, in our case), it would be unjustified to do power supply from alternative sources, and bearing in mind that the construction of the building, installation of substation maintenance exceeds the jurisdiction of district heating.
The obtained quantitative results are as follows:
1. Facade thermo isolation, styrofoam d=12 cm
2. Flat roof thermo isolation, tervol d=30 cm
3. The fifth chamber PVC profiles for doors and windows facade
4. Thermopane glass with an inert gas argon (double glass with air gap, 4+12+4). Low-emission coating film on the glass on the
inside.
5. Thermo isolation terrace above the third floor space heating, hard polystyrene d=15 cm
6. Skylight in the staircase, with the blinds open at the top is reversed, it will be installed instead of two Velux windows with
tempered glass and the possibility of opening the remote control.
7. Other, less important parameters are also improved.
Budget with improved parameters that influence the EE under the new regulations on EE obtained quantitative results are as follows:
The obtained result is the energy class C, with a consumption of heat Qh / A = 55.71 kWh/m2, which is quite a good result, considering the type of facility with a 35% glass surfaces. In relation to the originally planned, the result is improved by 30%.
We note that the higher energy classes at least according to these regulations, are reserved for other types of objects, which are powered in part from renewable energy sources (solar, geothermal energy, heat pumps, etc.).. This type of objects, it is questionable maintenance (cost-sharing) facility during the period of exploitation, in the case of our facility, where there is infrastructure in Novi Sad district heating plants (which will, in our case), it would be unjustified to do power supply from alternative sources, and bearing in mind that the construction of the building, installation of substation maintenance exceeds the jurisdiction of district heating.
Knowing that this property of the Novi Sad for the calculation of the heating heat consumption billed according to actual energy consumed (and not per m2), the expected savings will be at least 30% less heating energy bills compared to similar facilities. In this way, and raises the total value of the property, which is home to buyers at the moment, at a very reasonable price, very long-term profitable investment.