# Mentor Blogs

## Posts tagged with 'HVAC'

10 Jan, 2014
Mechanical Analysis

## Heat Your Home Office for 8p a Day. Part 5 - Putting it All Together

Posted by Robin Bornoff

Simulation should never be done for its own sake. 3D computational simulation is still a relatively young technology in the grand scheme of things, akin to the automotive industry of 100 years ago where drivers were more like engineers, they had to be to use the car. Coming up with a design solution is analogous to getting to your destination in a car, it’s also quicker than walking. That’s … Read More

18 Dec, 2013
Mechanical Analysis

## Heat Your Home Office for 8p a Day. Part 4 - Comfort Temperature

Posted by Robin Bornoff

Have you ever wondered why, after a winter night, some of your car windows are iced over whilst others are not? Happens after a clear night with no clouds. To understand the reason one must appreciate the fact that something loses heat, and thus gets cold, for two reasons; losing heat to the local air by convection and losing heat to any colder surrounding object due to thermal radiation. On a cold … Read More

9 Dec, 2013
Mechanical Analysis

## Heat Your Home Office for 8p a Day. Part 3a - Was Dave Right?

Posted by Robin Bornoff

It’s always nice to get some comments on your blog. When starting writing blogs about 4 years ago I was told that so long as you write about something that you’re interested in, then others will read it. Comments are the echo to what otherwise would be a Demosthenes type shouting at a roaring sea of disinterest. So when a colleague here at Mentor, Dave Roberts, commented on Part 3 of this … Read More

19 Nov, 2013
Mechanical Analysis

## Heat Your Home Office for 8p a Day. Part 2 - Thermal Interception

Posted by Robin Bornoff

We often do things that we intuitively feel are beneficial, often without realising just why. One of the beauties of simulation is its ability to provide insight into a physical phenomena or design. Sometimes described a a computational experiment, simulation can do more, and more easily, in terms of ‘measuring’ a system. I’ve applied this advantage to help describe why putting a couple … Read More

18 Nov, 2013
Mechanical Analysis

## Heat Your Home Office for 8p a Day. Part 1 - Really?

Posted by Robin Bornoff

Dylan Winter, boat owner, film maker and blogger, made a youtube video about a year ago showing how four tealights (small candles) can be used to warm up a small well insulated home office. A couple of weeks ago the video went viral, now having ranked up nearly 2.5 millions views. A couple of friends pinged me to see if I could help explain why this apparent miracle in home heating worked. Some pacing … Read More

17 Dec, 2012
Mechanical Analysis

## Mentor Graphics Data Center Design using CFD Modeling

Posted by Travis Mikjaniec

Hello Everybody   Previously, I co-authored a semitherm paper on the use of our HVAC CFD tool, FloVENT, on the design of a Mentor Graphics data center.  Recently I have seen this topic republished in the data center journal with the title “EDA Vendor takes its Own Advice on Data Center Design”.  I find this topic interesting, so I thought I’d blog about this and break from my typical … Read More

16 Aug, 2012
Mechanical Analysis

## Where’s the Best Place to Put a Radiator in a Room? Part 5: Get a Job

Posted by Robin Bornoff

Effective use of a Computational Fluid Dynamics (CFD) simulation tool requires at least a working knowledge of fluid dynamics itself. Tools alone don’t make for a good engineer. When interviewing for jobs within the Mechanical Analysis Division (and way back into Flomerics days too) a common question posed to tease out such an understanding is to describe the air flow patterns in and around a … Read More

9 Aug, 2012
Mechanical Analysis

## Where’s the Best Place to Put a Radiator in a Room? Part 4: Premature Simulation

Posted by Robin Bornoff

One thing the Mechanical Analysis Division is not guilty of is vendor hubris. Despite the passion we have about our CFD based simulation solutions we know our place, especially in terms of where best to apply our solutions throughout the design process. CFD is a very powerful tool to predict 3D heat air flow and heat transfer but it certainly isn’t the only approach. As is common in both electronics … Read More

31 Jul, 2012
Mechanical Analysis

## Where’s the Best Place to Put a Radiator in a Room? Part 3: 13% Better

Posted by Robin Bornoff

Conventional wisdom has it that the best place to put a radiator in a room is under the window. However, there’s nothing conventional about wisdom and one should be obliged to question and verify those facts that we take for granted. CFD and its ability to predict air flow and heat transfer offers an unrivalled efficient method to study such applications. Using the concept of PPD (percentage people … Read More

26 Jul, 2012
Mechanical Analysis

## Where’s the Best Place to Put a Radiator in a Room? Part 2: PMV and other TLAs

Posted by Robin Bornoff

Sometime between 40 and 100 thousand years ago humans started to wear clothes, an estimate as accurate as you’d expect for something that wasn’t documented at the time. Earliest estimate of  humans documenting language are a mere 5000 years ago. One can only assume that it wasn’t modesty or fashion that drove the adoption of clothing, but comfort. Much of what we still do today, frequently … Read More

12 Jul, 2012
Mechanical Analysis

## Where's the Best Place to Put a Radiator in a Room. Part 1: Such Things are Important

Posted by Robin Bornoff

With the gulf stream having shifted south and now flowing happily somewhere high over Paris, the summer weather in the UK has been ‘unseasonably’ (literally) wet and miserable. People’s heating has been thermostatically popping back on all over the country which for July is unheard of. So with this as the background and in the context of a stagnating world economy, ever continuing … Read More

30 Apr, 2012
Electrical & Wire Harness Design

## Comfy cars

Posted by John Day

One of the more significant obstacles to automotive start-stop systems is how to keep the car comfy with the engine off. Saving fuel is great, but not if the infotainment system, HVAC et al were to shut down at every red light. At the SAE World Congress in Detroit last week, Delphi Automotive introduced a Phase Change Material (PCM) Evaporator that it said will keep start/stop vehicle cabins cooler … Read More

30 Apr, 2012
Mechanical Analysis

## Physician Heal Thyself

Posted by Nazita Saye

A virtual version of one of the MGC data center representing one of the configurations tested. Image courtesy of Mentor Graphics. Over the weekend I realized I have become English. No, I haven’t picked up the accent. Nor do I eat Marmite. Actually eating Marmite can be relegated to one of those things I’d never do. Never, ever. So why have I become English? I tend to discuss the weather and temperature … Read More

17 Apr, 2012
Mechanical Analysis

## More Than Two Decades and Still Going Strong; FloTHERM and FloVENT V9.3 Now Released

Posted by Robin Bornoff

In 1989 Flomerics was the first organisation to provide application specific CFD based simulation software where all pre and post-processing capabilities were contained within a single WIMP based graphical user interface. That pioneering period involved missionary sales to add simulation to the arsenal of the design engineer, enabling virtual prototyping to be used as a precursor to physical build and … Read More

4 Apr, 2012
Mechanical Analysis

## Simulation Software So Simple Even Teenagers Can Use It

Posted by Robin Bornoff

The UK government has a policy for all year 10 or year 11 students to undertake a week’s work experience. Last week we welcomed a 15 year old student to the Mentor office where the FloTHERM and FloVENT software development is done. The student was tasked with simulating the air flow and temperature distribution in the office space using FloVENT. Using our own software to model our own offices … Read More