Assignment on Design Analysis of House in Different Climates

Design Analysis of House in Different Climates 1
DESIGN ANALYSIS OF HOUSE IN DIFFERENT CLIMATES
Student’s Name
Course
Professor’s Name
Institutional Affiliation
City
Date

Design Analysis of House in Different Climates 2
Contents
Introduction......................................................................................................................................3
Design Case.....................................................................................................................................3
Task 1: Identify the Main Sources of Heat Gain During.................................................................4
Task 2: Internal Casual Gains Per Unit Floor Area.........................................................................5
Heat gain as a result of equipment...............................................................................................5
Heat gain as a result of occupancy...............................................................................................6
Heat gain from lighting................................................................................................................6
Task 3: Solar Heat Gain Calculation...............................................................................................7
Task 4: Total Heat Gain Calculation...............................................................................................9
Task 5: Natural Ventilation Calculation..........................................................................................9
Task 6: Climate in Munich Vs Manchester...................................................................................10
Task 7: Average daylight factor....................................................................................................10
Conclusion and Recommendations................................................................................................11
Reference List................................................................................................................................12

Design Analysis of House in Different Climates 3
Introduction
Solar radiation is an important element in heat gain and loss in buildings. It is a function
of three main features that include; sun location in the sky, clearness of the sky, and building or
structures orientation relative to the movement of the sun. In basic terms, solar irradiation is
defined as the solar energy striking a body surface from all directions. Three aspects happen
when such irradiation strikes the surface, namely, absorption, reflection, and transmission. These
aspects are dependent on body material. The body could be an opaque whose transmissivity is
equal to zero, a black body whose reflection equals to zero, and a gray body whose emittance is a
fraction of the radiation energy that a body can emit at the same temperature as a black body.
Design Case
In this assignment, a basic 2-bedroom bungalow house in Manchester, London is
analyzed for heat gains and losses during the summer season. Solar heat gains are beneficial
during the winter season of the year as it reduces the heating load requirements. Low energy
design for a building is a factor of orientation, construction methods, and building façade. The
windows for the house are operable manually by the occupants of the building. The windows
feature 6mm double glazing characterized by low emissivity hard coat. This is an interesting
feature of the windows in control of heat gains or losses as the air gap between the panels act as
insulation since air is a poor conductor of heat. In addition, internal blinds are installed in every
window. These blinds block excessive irradiation from the sun during the summer season.

Design Analysis of House in Different Climates 4
The doors have no glazing and hence radiation heat transfer does not happen through any
given door. External shading is provided by a 25cm extrusion of the eaves beyond the walls.
The building occupancy has been established to be 2 adults and 2 children who occupy the
premises for fourteen hours from 6 pm to 8.30 am. On a normal working day, the building is not
occupied between 8.30 am and 6 pm. The building is oriented in N-S direction as shown in
figure 1 below. The building insulation material is as per the 2013 Part L of the Building
Regulation.
Figure 1: Building rooms understudy
Task 1: Identify the Main Sources of Heat Gain During
The two chosen rooms for analysis are the living room and the kitchen which are oriented
in the southern direction.