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Archive for 2017

Variability: Efficiency Tweaks for your A/C

Variability: Efficiency Tweaks for your A/C

A/C systems can be set up to use 30-50% less power if variable control technologies such as variable speed drives (VSD), variable air volume (VAV), and variable refrigerant flow (VRF) are used. These technologies allow A/C systems to operate efficiently at part-load, lowering energy use and extending lifetimes. Find out more about how these can fit into your current site with our guidelines on the relative advantages for each type.
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My first month at COzero

My first month at COzero

About a year ago I made a decision to transition into the tech industry. I went from working in the logistic industry to working in the tech industry. It's been a challenging experience of continual learning. Now that I'm working at COzero this is where the real learning. It has been a challenging but rewarding experience starting my first role in the tech industry.
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424 things you should know before sitting AWS Certified Solution Architect Associate exam

424 things you should know before sitting AWS Certified Solution Architect Associate exam

Want to pass the AWS Certified Solution Architect Associate exam? Here are some study tips including 424 questions you should be able to answer before sitting the exam.
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A standard work-breakdown structure for data science

A standard work-breakdown structure for data science

In a previous post we introduced how we are approaching data science at COzero, making sure it is an integral part of our DNA as a company. However, data science processes are usually described by some rendition of elements of the scientific method or at times borrowing terms and procedures from statistics. Here we present our interpretation of that process in more detail, which we don't claim is the whole truth but a conscious effort to remove the hype to make the process sustainable from a business perspective.
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Data science in a business context

Data science in a business context

Much is said about the successes and failures of the new kid on the block, data science, and arguably there is much hype about it today. But being at the core of COzero's DNA, we made a conscious effort to remove the hype and use data science within our business. What does it mean for a company to do data science? Here is our answer.
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What do changes to NABERS building standards mean for businesses?

What do changes to NABERS building standards mean for businesses?

Australia's NABERS building standards program has been in effect since 1998 and has helped building owners save more than $100 million in the last seven years alone. In July, 2017, the program was extended to cover even more commercial buildings. To commemorate this milestone, I'll review how NABERS compares to other efficiency rating programs around the world and examine whether NABERS compliance has a positive return on investment.
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What does the Power of Choice ruling mean for Australian businesses?

What does the Power of Choice ruling mean for Australian businesses?

From December 2017, all new buildings will get smart meters as part of the AEMC's Power of Choice ruling. Are we all doomed to grow extra eyeballs from the radiation from smart meters and have our homes broken into due to meter data hacks or could the extra data that smart meters provide make the grid stronger and more efficient? It will all depend on the success of the implementation but hopefully the learnings from smart meter rollouts in Victoria and Italy will make Power of Choice a tour de force for Australia's electricity market.
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How does Australia's energy efficiency compare to other countries?

How does Australia's energy efficiency compare to other countries?

Since 2012, Australia has plummeted from 6th place in the ACEEE international energy efficiency benchmarking report to 16th. During the same period, Japan has leapt forward from 6th place to 2nd place in 2016. Both countries have substantial room for improvement and our hope is that efforts from utilities in both countries to help their customers reduce energy consumption will propel Japan and Australia up the ranks in the 2018 report.
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Optimising operational hours to minimise capacity and consumption charges

Optimising operational hours to minimise capacity and consumption charges

Having an efficient operational profile makes the difference between flicking an electricity bill over to accounts payable and having a heart attack while skimming over the capacity charges. It's important to ramp equipment up sensibly so that you can maximise occupant comfort and productivity without causing consumption spikes.
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When does submetering make sense?

When does submetering make sense?

Managing energy consumption without submetering is like trying to drive without headlights. If you manage a large site, submetering gives you granular consumption data so you can pinpoint waste, streamline your operational profile and pass on costs to tenants.
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Dealing with electricity bill shock post July 1

Dealing with electricity bill shock post July 1

Electricity prices have skyrocketed since July 1st but that doesn't mean you just have to groan and pay up. Take ownership of your bill - negotiate a better rate and then use the bill shock as motivation to decouple your revenue from your electricity bill. There are a myriad of ways to reduce your energy consumption whilst serving customers better. Our customers typically find they can reduce their consumption and capacity charges by 20%. That'll do a lot more for your bottom line than trying to haggle over a few cents/kWh.
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Energy efficiency breakthroughs in data centres

Energy efficiency breakthroughs in data centres

In 2008 there were dire projections that data centres would become a tremendous strain on the grid. However, concerted efforts from Google, Amazon, Facebook and other tech giants to improve energy efficiency have meant that although the total number of installed servers has dramatically increased since 2008, energy consumption has remained stable. How did they do it and what can businesses in other industries learn from this efficiency breakthrough?
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Streamlining our deployment processes with Docker and Buildkite

Streamlining our deployment processes with Docker and Buildkite

Docker makes replicating builds fast and easy, Buildkite pipelines manage build, test and deploy steps, and AWS removes most management overhead from our infrastructure requirements.
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Tips for getting a job as a developer

Tips for getting a job as a developer

If you're thinking about applying for one of our developer roles, here are some tips to help you maximise your chances.
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Insights into Homebuilding

Insights into Homebuilding

Spending time in Mexico has provided insights into the process of building houses, the challenges involved, as well as the problem solving that makes for safe, secure, and weatherproof homes.
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Why don't more companies implement energy efficiency measures?

Why don't more companies implement energy efficiency measures?

The energy efficiency paradox has been a topic of academic curiosity for decades. Despite having immense economic and environmental benefits, the majority of companies do not implement meaningful energy efficiency programmes. The barriers are manifold: resistance to change, lack of access to capital, risk aversion, the principal agent problem (landlord vs tenant) and information asymmetry. In spite of these barriers, many companies have taken action on energy efficiency. These businesses generally financially outperform companies that brush energy efficiency aside, and also realise efficiency gains in other areas across the business.
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Sketchnoting at conferences

Sketchnoting at conferences

After doing a sketchnoting workshop a few weeks ago, I gave it a crack at Agile Aus. While my drawings will never win awards, I found the process of sketchnoting dramatically improved my listening and I have greater retention of the talks than I normally would with text-noting.
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Building Hope with Project Mexico

Building Hope with Project Mexico

Volunteering with Project Mexico to build homes has been a beautiful experience while staying on the 16 acre ranch of St Innocent's Orphanage.
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Calculating the characteristic function

Calculating the characteristic function

The Fourier transform of the probability density function is sometimes used to derive certain concepts in Statistics. In this post we describe what it is, its use to describe kernel density estimators and how to calculate it and plot it in Python.
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Density estimation

Density estimation

Being able to measure the degree of randomness (or of our ignorance) on a bunch of values is a critical tool for data science. In this post we explain the basics and how we are applying this to grab early insights from electricity consumption data.
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