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南洋理工大学科学家发明了“液态窗户”,它可以在炎热的天气里变得不透明,节约建筑物高达45%的能耗

Nov 05, 2020 | 🚀 Fathership

窗户是建筑里能源效率最低的部分。

为了减少对空调这一耗能产品的需求,南洋理工大学(NTU)的科学家们发明了一种独特的液态节能窗。

这种窗户使房间更温暖

与墙壁和混凝土相比,玻璃很容易传递热量。

在新加坡这样的热带气候中,热量会通过玻璃传递到室内,导致空调需要耗费更多能量来为建筑物降温。

据2009年联合国的一份报告显示,40%的全球能源使用量来自建筑能耗,其中一半因玻璃窗户易传送热量进出室内导致。

节能“液态窗户”

南洋理工大学科学家研发的窗户叫做“液态窗户”,在两片玻璃间灌入含有水凝胶的液体。

根据模拟测试结果显示,使用液体代替传统玻璃能减少建筑物高达45%的能耗。

传统的节能玻璃涂有特殊涂层,反射热量的同时仍会让阳光直射,比液态玻璃的能源效率低30%。

由于传统节能窗户玻璃的涂料比较昂贵,所以这种由微水凝胶、水和稳定剂的混合物制成的液体窗户成本更低。

因此,南洋理工大学的研究人员采用水而非玻璃,因为前者可以在升温之前吸收许多热量。

水还可以存储许多能量,使其无法通过玻璃传递到建筑物中。

夜晚降温的时候,这些积聚的热量会被释放。

图片来自南洋理工大学

有助于降低电费

液态窗户不仅有助于减少能耗,还能适应温度变化。

室外温度较高时,窗户会变得不透明,从而挡住阳光。当温度降低时,窗口会回到原本更透明的状态。

例如,在阴天或雨天,窗口会保持透明。在特别炎热的日子里,窗户则会变得不透明。

图片来自南洋理工大学

动图来自 NTUsg / YouTube

在新加坡进行的室外测试表明,在一天中最热的中午,液体窗户的温度低至50°C,远低于84°C的传统窗户。

科学家还测量了窗户在什么时间段存储最多的热能。

普通玻璃窗的温度峰值在正午12点,即太阳处于最高位的时候。

然而,液体窗户则在下午2点才升至最高温。

温度延后达到峰值可能会为用户节约电费,因为电力负荷的峰值也随之发生变化。

同时,液态窗户的隔音功效比中空玻璃窗户强15%。

办公室使用更佳

这项科研的第一作者龙祎称,由于液态窗户在一天中有几个小时会变得不透明,这使它最适合办公大楼而非住宅。

这是因为在理想的情况下,居民楼里的人都希望自己的房间有一个良好、通透的视野。

目前,研究团队正在与行业内的伙伴合作,希望将这一发明商业化并扩大规模,以便应用在真实的建筑物中。

图片来自南洋理工大学

PSP's Tan Cheng Bock voted out as Sec-Gen after alleged party infighting

Apr 01, 2021 | 🚀 Fathership

Former Republic of Singapore Air Force colonel Francis Yuen has been appointed secretary-general of the Progress Singapore Party (PSP), taking over from party founder Tan Cheng Bock.

Dr Tan, 80, has become party chairman. This was announced by the PSP on Thursday (April 1), after its central executive committee (CEC) met on Wednesday.

In a Facebook post, PSP Non-Constituency MP Leong Mun Wai said Mr Yuen was the committee's unanimous choice to "lead PSP to the next level".

"Francis will lead and galvanise the party while (Dr Tan) concentrates on strengthening external support for PSP," he wrote.

Chairman role is basically a glorified flower pot

In many organisations around the world, the Secretary-General position has the authority to make all the decisions of running the organisation - or party. The Chairman generally does not have any more power pe se than any other voting member of the Executive Committee, except the power to run board meetings.

Comparatively, the Secretary-General is like the Chief Executive Officer of the company.

For example, the People's Action Party chairman is Gan Kim Yong while the Secretary-General is Lee Hsien Loong.

Party infighting?

The change comes amid reports of a rift in the party. An online news site, the RedWire Times, said in March that some party cadres have demanded for Dr Tan to step down as secretary-general, and allow for "more talented rising stars" to take over.

Commenting on the Redwire Times report, PSP member Kumaran Pillai said the new CEC line-up is in no way a reflection of any disagreement over the leadership of the party. Rather, Mr Yuen assuming the secretary-general role is part of a planned transition, he added.

“When Dr Tan started the party, he said he will mentor someone younger, and he hasn’t deviated from his original mission. People shouldn’t be reading too much into it.”

Mr Pillai added that he had a long dialogue with the party cadre who was quoted anonymously by Redwire Times as saying that some cadres are mustering support to demand for Dr Tan to step down from his post.

“His intention is not to stage a coup within the party. I think people have misinterpreted it and misunderstood what he said, sometimes it's like playing broken telephone, you say one thing and by the time you get to the last person, the whole story gets distorted along the way... there’s no infighting, there's no malice,” he said.

In other words, the flower pot needs watering.