Regulations Regarding Latvian Building Code LBN Average monthly .. the difference is m s-1, but difference with LBN value is and. lbn 01 pdf to jpg. Quote. Postby Just» Tue Aug 28, am. Looking for lbn 01 pdf to jpg. Will be grateful for any help! Top. Regulations regarding the Latvian Building Code LBN “Construction Climatology”. Issued pursuant to. Section 2, Paragraph four of the Construction Law.
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This Regulation prescribes the methodology for calculating the energy performance of a building. The methodology shall be used in drawing up an energy balance at the building level. If an energy balance is being drawn up at the level of technical building systems or if the energy required for heating that has been calculated for the building is lower than 50 kilowatt-hours per square metre of the area under calculation, a detailed calculation shall be carried out in accordance with Standard LVS EN ISO The carbon dioxide CO2 emission factor comprises all emissions of carbon dioxide Lnnwhich are related to the primary energy consumed by a building.
The carbon dioxide CO2 emission factors are specified in Annex 003-001 to this Regulation. Energy that is produced is not auxiliary energy. Delivered energy can be calculated or measured according to the definite energy use types.
Thermal energy gains lbj internal heat gains and solar heat gains. Losses of a system can become internal thermal energy gains of a building, if they are recoverable. Thermal energy that has been recovered in the system shall not be thermal energy losses, but thermal energy gains. Active solar systems for example, sun collectors shall be part pbn the technical building system.
An energy rating, when determining annual energy consumption, shall include the technical building systems, which ensure:.
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Other energy-consuming systems, which are built in the building and ensure functional needs of the building for example, elevators, escalators and industrial technological equipmentshall be taken into consideration in calculations of the energy rating, however, they shall not be taken into consideration when determining annual energy consumption indicators. An assessment of energy consumed in the building shall include the auxiliary energy supply and energy losses of the technical building systems.
Energy consumption for heating, cooling, heat transmission losses and heat losses through ventilation shall be assessed in accordance with Chapters III, IV, V and VI of this Regulation, taking into consideration internal and solar heat gains and recoverable losses of the technical building system. For buildings to be designed energy consumption in a domestic hot water system shall be assessed in accordance with Section 5.
Domestic hot water systems, generation”. For existing buildings the energy consumption in a domestic hot water system shall be assessed on the basis of the measured data regarding the heat consumption and hot water consumption. If there is a common accounting of thermal energy for the heating and domestic hot water systems in a building, then, on the basis of data regarding the energy and hot water consumption in the period when heating is not used, the following calculation simplification shall be admissible for existing buildings – the energy consumption in the water supply system for heating and circulation of hot water for a year period shall be calculated by using linear extrapolation.
In such case the distribution of heat losses of hot water circulation must be determined:. For buildings to be designed the assessment of energy consumption for lighting shall be carried out in accordance with Standard LVS EN For existing buildings the assessment of energy consumption for lighting shall be carried out on the basis of the lighting system luminaires and their control equipment output, assessment of the actual work hours and measured electricity consumption in the building.
For residential houses the energy consumption of the lighting systems of a building shall not be taken into consideration and shall not be included in the annual energy consumption indicators. Boundaries of an energy rating shall be determined prior to commencing the assessment.
A system boundary is related to the object under assessment for example, building, building unit, apartment and comprises all elements of the interior and exterior, which are related to the building where the energy is produced or consumed. System losses within the system boundaries shall be calculated in detail, while outside the system boundaries they shall be calculated by using conversion coefficients. Boundaries of an energy rating and the energy flow scheme are specified in Annex 2 to this Regulation.
Energy can be imported or exported through the building boundary. If the system equipment for example, boiler, cooler, cooling tower is located outside the building envelope, consumption of an energy carrier for example, for gas, electricity, thermal energy, water shall be determined by using a meter.
The boundary of an energy rating for energy carriers gas, electricity, thermal energy and water shall be a meter, while for liquid and solid energy resources – the boundary of the storage system. If part of technical building systems for example, boiler, cooler, cooling tower is located outside the building envelope, it shall be considered that they are inside the boundary, and the losses of the relevant system shall be taken into account.
Active solar, wind and water energy shall not be part of the energy balance of a building. An energy balance shall include energy, which is delivered by the energy production equipment for the building consumption, and auxiliary energy required for delivering to the building energy from heat sources for example, from a solar collector.
When carrying out calculation of the primary energy consumption indicators, an assessment shall include systems that are within the boundaries of the building or building space in accordance with Annex 3 to this Regulation.
A calculated energy rating 00-301 a group of buildings lb be carried out, if all of the following conditions are in force:. A measured energy rating shall be determined in accordance with Chapter 4 of this Regulation. A calculated energy rating shall be determined in accordance with Chapter 5 of this Regulation. For buildings to be designed, reconstructed or renovated the following output data shall be applied when acquiring the calculated energy rating at the design stage:.
If in the course of construction deviations from the initial building design affect the energy performance indicators of a building, then, when putting the building into operation, an adjustment of calculations shall be carried out, taking into consideration the actual properties of the outer building envelope and technical building systems.
For buildings in operation a measured and calculated energy rating shall be determined by using data regarding:. For buildings in operation a measured and calculated energy rating llbn be validated in accordance with Chapter 6 of this Regulation.
General Requirements for the Assessment Period. Energy consumption for all energy carriers must be assessed in an equal time period. If in the previous time period accounting of energy carriers ln not been carried out, an assessment of the measured energy performance of a building may not be performed.
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An assessment period shall be the full number of years. If an assessment period is not the full number of years, the annual energy consumption shall be obtained by using the extrapolation method. If an assessment period is shorter than five years, an adjustment of the energy consumption due to climatic conditions shall be performed. If changes have been made to a building in the assessment period, which affect the energy performance thereof for more than 10 per cent, the previously obtained data may not be used for the assessment of the energy performance of the building.
If changes made to the building affect the energy performance of the building up to 10 per cent, the previously obtained data may be used with an adjustment that is justified by appropriate calculations. Data Obtaining and Adjustment Extrapolation. Consumption of energy carriers electricity, gas, thermal energy measured with a meter shall be the difference between two meter readings that shall be read at the beginning and at the end of the assessment period.
Bills from electricity, gas and thermal energy suppliers or the building manager may be used for assessing the consumption of such energy carriers assessment period – full years. If an energy carrier is used in several technical building systems and for several purposes, the consumption of the energy carrier shall be distributed by technical systems and purposes. The level of liquid fuel in a tank shall be measured at the beginning and at the end of the assessment period by using a calibrated scale.
Consumption of liquid fuel in the assessment period shall be the contents of the tank at the beginning of the assessment period, from which the contents of the tank at the end of the assessment period have been deducted and to which the amount of the fuel purchased in the assessment period has been added.
If gas is delivered in gas containers, fuel shall be assessed by adding up the number of the used containers volume of the containers shall be taken into account. If a burner runs with a fixed output without modulation and is equipped with a burning time meter, consumption of the fuel shall be the difference between two readings that have been performed at the beginning and at the end of the assessment period, multiplied by the flow speed in the burner. The flow speed in a burner shall be measured before the first reading and after each setting or cleaning.
The consumed amount of delivered energy shall be determined in one of the following manners:. The net calorific values of fuel shall be determined in accordance with Clause 1 of Annex 1 to this Regulation. The gross calorific values of fuel shall be determined in accordance with Clause 2 of Annex 1 to this Regulation. The energy content of solid fuel for example, coal, wood depends on the quality and density thereof. Consumption of solid fuel shall be the weight of fuel in stock at the beginning of the assessment period, from which the weight of fuel in stock at the end of the assessment period has been deducted and to which the weight of fuel purchased in the assessment period has been added.
In order to obtain the weight of solid fuel, the measured volume shall be multiplied by the density of the fuel. When calculating the confidence interval of the weight, the ambiguity of density and moisture shall be taken into consideration.
For energy carriers that are used, if the average output of equipment is constant and lbnn extrapolation is linear, the amount shall be calculated by using the following formula:. E per 0033-01 amount of the energy carrier that has been consumed in the accounting period of the energy carrier kg, m 3 or Wh.
For energy carriers that are used for heating or cooling the extrapolation shall be carried out by using the energy accounting or simplified calculation in accordance with Paragraph 42 of this Regulation.
If an assessment is carried out by using the energy accounting, the assessment period shall cover a wide at least month range of the average external temperatures. The simplified extrapolation calculation shall be used for calculating the amount of an energy kbn, which is used for heating or cooling 003–01 the whole year. It shall be calculated by using the following formula:. Q nov,apr – energy required for heating and cooling calculated for the assessment period Wh.
E nov – amount of the energy carrier used for heating and cooling in the assessment period kg, m 3 or Wh. Energy required for heating and cooling calculated for a year Q kop,apr shall be calculated by using the 4 th formula and individually calculating the energy required for heating and cooling that has been calculated by using the 5 th and 6 th formula:.
T 1 – average set-point temperature in the assessment heating lbb cooling period o C. If a 03-01 energy rating is based on energy consumption data obtained in a period that is shorter than five full years, an adjustment of the measured energy performance due to climatic conditions shall be required for ensuring the correspondence between the consumed energy measured in the measurement period and the average local climatic conditions.
The measured energy consumption for heating and cooling shall be adapted according to the local climatic conditions at the place of location of a building.
In order to adjust energy consumption according to climatic conditions, the values of the heating period duration and the average external temperature specified in Table 7 of LBN “Construction Climatology” shall be 003–01.
Adjustment of energy consumption due to climatic conditions shall be calculated in accordance with Paragraphs 47 and 48 of this Regulation.
Adjustment of energy consumption, using the degree days, shall be carried out by using the following formula:. GDD 1 – standard number of degree days that determined in accordance with Paragraph 48 of this Regulation. GDD – number of degree days in the assessment period determined pbn accordance with Paragraph bln of this Regulation.
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The following information shall be required for the assessment of the technical building systems of a building:. Required energy shall be calculated on the basis of the thermal energy balance of building zones. Energy required for heating and cooling shall be the main data of the energy balance of technical building systems. When acquiring the calculated energy rating, the energy balance shall be divided:.
Indicators required for the calculated energy rating shall be obtained according to the following procedure:.
Selection of a Method for Calculating Heat Balance. The following shall be taken into consideration for determining the heat balance of a building or its zones:.
The energy balance of a building shall also lgn the energy recovered in the lbj from different technical building systems. One of the following methods shall be used for calculating the energy balance of a building:. Heat balance shall be calculated during a sufficiently long time period – one month or 00301 whole season.
Part of the accumulated and released heat shall be disregarded, while dynamic effects shall be taken into consideration, empirically determining the gain and loss utilisation factor. It shall be used for calculating heat balance in short time periods for example, per hour. Heat accumulations and part of the heat released from the building, which depends on the thermal inertia of the building, shall be taken into consideration. The dynamic method models thermal resistance, thermal capacity and lnb and solar heat gains in the building or building zones.
When applying the dynamic method, it shall be taken into consideration that during the heating season under the influence of the heat surplus the internal temperature exceeds the set-point temperature, which transmits the surplus heat with an additional transmission, ventilation and accumulation, if the mechanic cooling is not used.
Switching off of the thermostat may not be lnn for lowering the internal temperature, because it depends on the building inertia heat release from the building. In calculations of the cooling period it shall be taken into consideration that the set-point internal temperature lowers below the set-point temperature.