ZHANG FEIMO


Day 1 20/05/13


Today we went to JTC CleanTech One in CleanTech Park. It was really an amazing journey and I have learned a lot from it.


CleanTech One is a building designed to be green. After listening to a speech made by a senior engineer and a brief tour around the building, I learned a few green strategies


1. Reducing Loads.


External Shading: This can be seen from the plants growing across the roofs. These plants are planted so as to provide shade for the Living Atrium as well as reduce the temperature by 2 to 3 degrees.


Lighting: All lights in CleanTech One are LED lights. Though LED lights have a comparably higher cost, they can save a lot of energy in the long run.


2. Passive strategy.


Day lighting: All lights are under the control of BMS (Building Management System). BMS can moderate the brightness of the lights according to different time periods in the day time. Estimated energy savings of it is 22.35% form conventional.


Optimizing Natural Ventilation: To minimize the use of air-conditioner as well as fans, the building is designed to have natural ventilation across the Living Atrium (the garden inside the building). Though it might not seem to be that significant, we do feel its effectiveness when we came down from the roof.


Additional Shading Using Claddings: By adding claddings to the walls outside, the engineers of CleanTech One prevent the building from the heat of the sun. This can add to the energy efficiency of the air-con systems inside the rooms.


3. Self-Generation:


Solar photovoltaic: The solar photovoltaic panels across the roofs have two functions. One is to self-generate the energy usage in the building. The other one is to provide shade to the Living Atrium.


4. Active Strategies:


Chilled Celling: In traditional air-con system, heat is transfers through convection. This makes heat cannot be transferred uniformly. For example, in a classroom, the students sitting next to the air-con may feel very cold while the others feel hot. However, by applying Chilled Celling, this is possible. In this system, heat is transferred by radiation. By applying cooling coils all around the celling with a graphite layer, the whole celling acts like an air-conditioner. With sensors, condensation is avoided. This system can also save about 20% of energy compared with traditional ones.


Besides these strategies, I am also impressed by the smart BMS, which can collect data of all the systems, helping the engineers to improve on them.


Finally, I want to thank all the staff in CleanTech One, especially the two ladies who showed us around kindly. I hope we can have an enjoyable and fruitful journey in the following days.






Day 3 22/05/13


Today we went to Fusionopolis and Bionopolis, two research and high-tech center in One-North.


We first visited a gallery in Fusionopolis. I learned about the masterplan of One-North by JTC. With a clear plan, every part of the area can perform its own function and cooperate with each other.


Then we visited Bionopolis, a research center of Bio technology. Here are a few things that impressed me most.


1. Pneumatic Waste Conveyance System: This system aims at reducing the messy scenes of collecting garbage and promoting tenants’ convenience. With this system, one just needs to throw the garbage into an opening on a tunnel. Then the garbage will be sucked into a collection center under the building “Helios”. The lengths of the tunnels add up to 22 km. However, tins may get stuck in this system. In this case, the system will automatically locate the position of the obstacle and report it to the stuff. This system really sounds future like and is quite efficient.


2. Building-Integrated Photovoltalic System: When I saw the photovoltalic panels for the first time, I thought they were artworks designed to decorate the multifunction room. However, when I took a closer look, I found what they really were. Different from the normal thick and unpleasant-looking photovoltalic panels, these panels were thinners and smaller, with beautiful patterns like frost on the surface. They were very beautiful and just like the ones in CleanTech Park, they provide shade for the multifunction room.


3. Shared Facility: All the companies in Biopolis share the same conference room and meeting rooms. This actually reduce the wastage of room. As it is known to us all, a company cannot have conference every day. A shared one will maximize the usage. Also, there is a center for washing glass apparatus, which frees the staff from these elementary jobs.




Compared with yesterday’s journey, I saw more big pictures than details. I knew how these technologies ran the whole campus. And also, I would like to thank the staff who gave us help. It was really kind of them.




Day 4 23/05/13


Today we went to Jurong Island. After watching a few videos and having some delicious refreshments, we departed from JTC Summit.


After a series of strict checks, we entered Jurong Island. Jurong Island holds a lot of chemical industry and petroleum companies, such as BASF and Shell. It is well-planned. JTCs masterplan of infrastructure enables the companies have abundant raw material supply, like hydrocarbon and petro.


After a visit to a gallery, I learned that Jurong Island used to be seven islands. Since 1980s, Singapore government decided to landfill these island and finally made them one island which was five times as large as the sum of original ones, known as Jurong Island now. However, because of its advanced infrastructure plan and convenient geographic position, Jurong Island attracts more than 60 companies and is more than 90% occupied. Land became scarce again. To solve this problem, JTC intended to build a cavern 150 meters under a bay area to store petro underground. This could actually save a large amount of space above ground


On the way back, we had a talk with our external mentor, Mr. Loh. He gave us a lot of help on our project and solved a lot of questions so far.


1. The construction of PDV system will be finished in July at the earliest. There is no alternative system for us to study so far.


2. VAV and PDV are two operation modes that can work together simultaneously. VAV refers to the system that controls the humidity of the room by letting fresh air into the room. It has a minimum opening of 10%.


3. It is possible to study the system throughout a model.


4. Two problems: The far end of the room may not be cooled.


Cold feet.


5. A suitable air flow rate makes human comfortable in a specific environment.


6. The sensors can neither be placed to near to the door nor the air-con system to achieve the accuracy.


7. Passive refers to Passive Strategy. There is no difference between PDV and DV.





Throughout the whole learning journey, I became more interested in STEM. Before the journey, I could not even imagine these future like technologies like Pneumatic Waste Conveyance System. They really fascinates me.

In my opinion, the most attractive one is the one to CleanTech One. I was amazed to see that every detail was designed to be green and energy-saving. I used to think STEM were for big things. However, after this site visit, I knew STEM can also for the small things but making big changes. I would like to take becoming a JTC engineer into consideration for my future path.