flow paths

Question 1

Integrated modelling aim?

Answer 1

➤ Preserve integrity of building/plant system by simultaneous processing all flow paths at a level satisfactory to the objectives.

➤ often design complexity is built throughout design stages, however a detailed one requires initial resources.

➤ some theoretical concepts may be neglected if deemed to be non-influential.

Question 2

State 7 Energy flow paths

Answer 2

➤  Transient Conduction 
➤  Surface Convection
➤  External / Internal  LWR exchange
➤  SWR exchange
➤  Air Flow 
➤  Casual Gains
➤  Moisture

Question 3

Controller components 3

Answer 3

➤ Sensor
➤ Response Algorithm
➤ Actuator

Question 4

What are passive solar elements and state (3)

Answer 4

➤ Capture, store and transmit E without mechanical systems

➤ Solar devices
➤ Sun spaces
➤ Roof ponds

Question 5

Environment impact from E systems (3)

Answer 5

➤ CO2 - global warming
➤ NOx - Acidification
➤ SOx - ozonelayer effects.

Question 6

➤ Transient Conduction Factors (3) and Influences (4)

Answer 6

➤ K (W/mK), p(rho) (kg/m^3) , Cp (J/kgK)

➤ Temp , Excitation value , Moisture , positioning`.

Question 7

➤ Surface Convection Factors (1) and Influences (4)

Answer 7

➤ Convection coefficient (h - W/m^2K)

➤ Surface roughness, Flow direction, Dimensions, Temperature difference.

Question 8

➤ External / Internal LWR exchange Factors (1) and Influences (4)

Answer 8

➤ Temp difference, emisivity, View Factor, Reflectiveness

Question 9

➤ SWR exchange Factors (1) and Influences (4)

Answer 9

➤ governed by alpha + tau + rho = 1

Question 10

➤ Air Flow / casual gains/ moisture Factors and Influences

Answer 10

➤ Infiltration / Delta P &Fb / Mechanical Ventilation / Induced

➤ Components within environment

➤ Dampness / mould / air born spores