Effect of Kitchen Air Distribution System Equation 4

By admin on November 21st, 2007

Effect of Kitchen Air Distribution System

Equation 4 assumes that a mixing air distribution
system is being utilised and that the exhaust/return air
temperature is equal to the kitchen air temperature
(assuming fully mixed conditions). Conversely, a
displacement ventilation system can supply low
velocity air directly into the lower part of the kitchen
and allow the air naturally to stratify. This will result in
a higher temperature in the upper part of the kitchen
while maintaining a lower air temperature in the
occupied zone. This allows for improvement of the
kitchen indoor air quality without increasing the capital
costs of the air conditioning system.
Picture 35 demonstrates a CFD simulation of two
kitchens with mixing and displacement ventilation
systems. In both simulations the kitchens have the
same appliances contributing the same heat load to
the space. The supply air flow and temperatures, and
the exhaust air flow through the hoods are the same
in both cases. The air is supplied through the typical
ceiling diffusers in the mixing system. In the case of
the displacement system, air is supplied through
specially designed kitchen diffusers located on the
walls. As one can see, the displacement system
provides temperatures in the kitchen occupied zone
from 22 to 26 C while the mixing system, consuming
the same amount of energy as displacement, results
in 27 32 C temperatures. This 2 C temperature
increase in the kitchen with the mixing air distribution
system will result in approximately 10% reduction in
productivity (see picture 6. page 9).
Halton HELP
TM
program allows kitchen ventilation
systems for both mixing and displacement ventilation
systems to be designed.

DEPTH OF INSTALLATION CAVITY (Niche depth) As previously

By admin on November 12th, 2007

DEPTH OF INSTALLATION CAVITY (Niche depth)

As previously described, the required depth of the installation cavity is mainly dependent on the kitchen design.

The FREEDOM COLLECTION refrigeration columns are designed for a niche depth of 24 (610mm). So, if the kitchen

cabinet (case + face frame) is 24 deep, this should accommodate many standard installations.
Please be advised that additional depth may be required for kitchen designs intending the look of flush fascia
across the cabinetry and the refrigerator door panel.
A) Standard Overlay Design
On a kitchen with standard overlay cabinetry, the face frame is also an important part of the
design. If the same aesthetics are to be continued on the refrigerator, then not only the door
cabinetry panel thickness (e.g. ) is included, additionally the face frame thickness must be
emulated. Thereby the resulting thickness of the appliance door panel is + = 1
(face frame emulation+door panel = custom appliance door panel). This cumulative
appliance door panel
thickness of the resulting custom appliance door panel requires added depth for the
(emulating a face frame)
installation cavity. Example 24 + = 24 (recommended is 25 ).
B) Full Overlay Design
The above mentioned requirements are of course also valid for kitchens with full overlay
design. However there are some chances to work with a niche depth of 24 : For this, the
small remaining visible area of the fully overlaid face frame has to be emulated within the
standard appliance door panel thickness of . This can be done by simply ignoring the
visible area of the face frame on the refrigerator ( extended size of the appliance door
appliance door panel with nose
panel) or by emulating the face frame by creating a respective nose on the appliance door
(emulating a face frame)
panel (see sketch).

Research Study A small sampling of middle and

By admin on November 11th, 2007

Research Study

A small sampling of middle and upper-middle class American kitchens
was observed and analyzed using the same methods as was used in this study. The purpose
was to inform design decisions for kitchens. Previous studies the Fall 2005 study was based
on were the Design Continuum research conducted in early 2005 on specific kitchen patterns
of use, the video ethnography conducted in the summer of 2005 to better understand the
natural habits of families in the kitchen, and the secondary research conducted in 2004 and
2005 deriving cooking trends.
Major patterns gleaned from the 98 insights are the following:
Organization in the Kitchen
Information exchange and management and space usage
Kitchen space supports family & social life
Dissatisfiers caused by kitchen not supporting varying users
Traditional uses of kitchen: cooking & cleaning
Design criteria were then developed from the above patterns.
Innovations in the kitchen should support family and social life.
Innovations in the kitchen should support non-food activities and multiple uses.
Innovations in the kitchen should support media and information management.
Innovations in the kitchen should support storage and activity space.
Innovations in the kitchen should support multiple users including children.
Innovations in the kitchen should support convenient cleaning and food management.
At the conclusion of this study, it was suggested to focus on users who pursue extreme
activities in the kitchen such as entertaining multiple times a week, cooks with professional
cooking skills, users with large families, etc. A new direction also suggested was to pursue
users who are undergoing or had undergone the kitchen redesign process. The latter
direction is the focus of this study with an additional focus on new construction for large
complexes.