Page 36 - Gi February 2022

igem news – yppc

Flow accessory Future development and contribution FIGURE 5A SMART CONTROL DEVICE INSTALLATION FOR HOTPLATE
Based on the current gas stove to gas industry
design, the lowest rating of a gas To conclude, the smart control device is
stove is around 0.25kW, which is a cost-effective solution that provides an
approximately 0.079L/s in terms of instant smart stove experience for users,
flow rate. Since the gas velocity is including remote security monitoring, a
slow, a small portion of gas remains leave home alert and an emergency shut-
above the MEMS sensor surface and off function. In the future, it will be able
heat cannot be dissipated, thus the to interact with other smart appliances
stove’s ON status cannot be accurately to perform integrated functions such as
detected in some circumstances. hood and hob interactions. A voiceover
However, this adverse effect can function will also be developed in the
be eliminated by inserting a flow app to provide greater accessibility for
accessary to separate the gas into two elderly customers.
paths at the inlet side. The main path The smart control device contributes
ensures enough gas flow to support to the development of smarter cities
the maximum rating of the appliance as well as a smarter gas industry. More
(i.e., 13.5kW), while the bypass importantly, it is an additional device
path enhances sensor sensitivity that can safeguard users, especially
by increasing the velocity of a small elderly customers, helping them to avoid
portion of gas, thus facilitating heat household accidents caused by absent-
dissipation on the sensor surface. mindedness. This is a double win situation
The gas velocity near the sensor for both consumers and the industry.
surface increases to 0.027m/s after
insertion of the accessory, thus heat Don’t forget, you can catch up with all
is effectively dissipated at minimum the YPPC presentations via IGEMtv
flow rate.
An appliance rating test according to FIGURE 5B SMART CONTROL DEVICE INSTALLATION FOR BUILT-IN HOB
GB16410 is also conducted to ensure the
installation of the device maintains the
appliance rating. The appliance rating is
calculated using formula below:

Where v = gas consumption, Q =
1
tested calorific value at 0°C 101.3kPa,
t = gas temperature inside the gas
g
meter, P amb = atmospheric pressure,
P = static gas pressure inside the gas
m
meter and S = saturated pressure under
temperature of t .
g
Installation
The smart control device is retrofitted
to the gas system in between the gas
pipe and tube as shown in Figure 5.
This installation only involves minor
changes to the gas connection and
causes the least disturbance to users,
while retaining the existing stove. This
means the whole application is more
environmentally friendly.
For the power supply to the device,
users can use a power bank to support
the device and self-maintain when
the device runs out of battery. The
Bluetooth connection, together with
an exceptional reporting mechanism,
lowers the power consumption of the
device, consequently reducing the
number of times the power bank needs
to be recharged. An AC to DC power
convertor is an alternative solution if
an AC socket is available nearby.

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27/01/2022 14:25
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