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BPI III - Energy Stationary Exam | Questions & Answers (100 %Score) Latest Updated 2024/2025 Comprehensive Questions A+ Graded Answers | With Expert Solutions $13.48   Add to cart

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BPI III - Energy Stationary Exam | Questions & Answers (100 %Score) Latest Updated 2024/2025 Comprehensive Questions A+ Graded Answers | With Expert Solutions

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BPI III - Energy Stationary Exam | Questions & Answers (100 %Score) Latest Updated 2024/2025 Comprehensive Questions A+ Graded Answers | With Expert Solutions

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  • August 4, 2024
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VasilyKichigin
BPI III - Energy Stationary Exam | Questions & Answers (100 %Score) Latest Updated
2024/2025 Comprehensive Questions A+ Graded Answers | With Expert Solutions




What factors influence thermal performance & heating demand? - building design

microclimate (location, altitude, urban/rural, ...)

systems (HC)

occupant (& behaviour)

What is the biggest percentage of energy demand in private housholds? - Space
heating 70%

space heating demand - net enery demand

of energy, which is required to heat a building.

independent of system or energy carrier.

Heating energy consumption - gross energy demand = net energy dem. / (heating)
system efficiency

takes into account production, storage, transmission and distribution of heat

Total energy consumption - = final energy consumption

= gross energy demand + hot water
+ lighting
+ electrical appliances

+ energy for operationability of heating system (pumps, fans, control system, ...)

Primary energy consumption - total energy consumption (for heating)

+ generation, conversion & distribution of energy carrier
(influence of system to which one is connected to produce the energy)

= total energy used to produce and transport the energy necessary for the building

Name 3 types of heating demand calculations. Describe what they are used for - 1. heat
load calculations
- design, plan & dimension the heating system

, 2. annual space heating demand
- determine amount of energy needed

3. transients
- time dependent behaviour (outside fluctuations influencing inside)

What parameters are needed for the heat load calculation? - reference temperature
(extreme outside temperature )

# and size of radiators

--> for dimensioning the heating system:

maximum heat load for a standardized reference indoor temperature

How is the annual space heating demand calculated? - Q_H = (Φ_T + Φ_V +
η(Φ_S+Φ_I)) * Δt

with η = use factor (how much can be utilized of gains)

What kind of heat losses does a house have? - transmission losses through surfaces

ventilation losses (introduce cooler air into heated space)

infiltration losses (leakage of cooler air inside / heated air outside) -> depends on
tightness of building

What does the magnitude of heat losses of a building depend on? - Temperature
difference (indoor outdoor)

ventilation & infiltration flow rates

area of walls, roof, floors, windows, ...

insulation level of building components

What is the protected (conditioned) building volume? - Volume where thermal comfort is
required and thus heating/cooling is implemented

≈ habited volume

calculated through use of external dimensions (incl. wall elements)

energy reference area - heated floor area of a building (in "thermal building")

(all heated above and underground floor areas)

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