1. The heat transformer

Heat transformer external.jpg

In the last two weeks I wrote an article on my blog about the heat transformer. Let me repeat & adapt the main idea. 

There are many industrials that are unaware of the Heat Transformer. This is a kind of heat pump that requires a minimum of electrical energy and is mainly driven by the waste heat stream. 

If you have a heat waste stream at a medium temperature of for example 90°C and need to heat up another process at a higher temperature, for example 40 degrees higher, then there is often nothing else to do than discard the first and produce the latter. Or at the best you can preheat the incoming cold stream.

Heat transformer of the project Indus3Es

There are many industries with heat waste at such a medium temperature and at the same time a heat demand on a higher temperature. I was myself in a well known food industry in Italy. They sterilised soup packages at 127°C. They were forced to discard the heat from cooling them and purchase 100% of the heat demand for cooking the soup upstreams. This was even a bit more complicated than many other examples in the industry. There were two heating processes here, like explained here:

  1. Heating the water and other ingredients for the soup.

  2. I don't remember this soup was cooled before being poured into the tin cans, but suppose not.

  3. Sterilising his soup in the containers at 127 °C.

Let us take a simple process where you have only one heating process and then the product has to be cooled, before it is shipped or put into the store room. Even in that case, the most you can do is to use the energy of the cooling end product for the preheating of the input stream. This is applied in several cases already, even if still not enough. In the case of the producer of soup, the production department was concerned with the risk of contamination during the heat exchange. I can hardly believe that there is no solution for that. One solution could be indirect preheating so that the risk of contamination is really negligible. This causes however a further drop in temperature so that it is even more difficult to reach a high temperature of the incoming stream. In all these examples, the heat transformer will bring the temperature of the waste heat on a level above the process temperature, so that in principle the heat can be provided completely by the heat transformer.

I say in principle, because as you see in the figure, only a part of the waste heat is available at a high temperature. Another part is flowing away at a still lower temperature. So what happens, is that the quality of the heat is increase, while the quantity is less. But that is also the reason that it is called a transformer! Look at the other picture (of the blog post), where you see the usual symbol of an AC voltage transformer. There the current is decreased in the secondary windings, while the voltage is increased.

Do you want to know more Best Available Technologies (BAT) on heat recovery? Open the document on the left from the European Commission!


2. The Energy Manager and a salary table USA

Salarytable EM fraction.jpg

On the website of Environmental Science, who’s mission is to be the most reliable and expansive advocate for environmental science education and careers, is also an article about the Energy Manager in the USA. It can be found on    



 (Click on the image on the left) 

It first poses the question “What is an Energy Manager?” and continues to see what they are doing in their daily business. The article foresees a growth of the job market between 3 and 7% in the USA, but that is starting from 2012 and may not take into account the Covid19 crisis.


Very interesting is the salary table for each of the States, according to the U.S. Bureau of Labor Statistics (BLS). Motivating numbers can be seen here and the BLS reported an average annual salary of $92,680 for energy engineers in 2013.


It is no wonder that these numbers are so good, if you consider that Energy Managers can bring a concrete benefit, not only on the energy bill, but also in the form of collateral benefits, many of which can be after all expressed in an additional cash flow. 

3. What has police to do with Energy Efficiency?


In my blogs and the vlog with the title “Energy policy or Energy Police?” I told already that in the Netherlands, the environmental police is also engaged in enforcing Energy Efficiency. On a Dutch website there is basic information about this. It asks:


Does your company use from 50,000 kWh or 25,000 m3 of natural gas (equivalent) annually? Then you are obliged to take energy-saving measures with a payback period of five years or less. Since 1 July 2019, the obligation to provide information has been added. This means that you must report for all your branches which energy-saving measures you have taken. You must report again every four years thereafter. 


The Netherlands is not the only country with such a rule, as it is only one of the Member States of the European Union, where environmental legislation is coordinated.

What can you tell about your country?

Write to news@birdseye-ec.com!


4. Energy consultancy on a distance

Surgery on distance.jpg

I know many energy consultancy firms that have a great difficulty to do their work as a result of the worldwide health crisis. On the first place, the energy consuming enterprises have many additional problems to solve. On the second place, they are afraid to let people from outside come into the enterprise for the energy audit. For the second problem I have a solution and thinking about it, I realise that it is also addressing the first issue. The solution is to bring my knowledge on a distance to the client and let them be my “eyes and hands” during my “visit” to the enterprise. I wrote already about it in the blog of 19 April and compared it with surgery on a distance. Also during this surgery, there is a senior surgeon that helps a team on a distance to take the right decisions and actions on the patient. Like in this case, visual contact that can be directed on the right scene and object can play a great role. 

The benefits that come with this solution can compensate for the first issue I mentioned, that is the urgency of problems related with the economic slow down. With the Remote Consulting, much knowledge is transferred to the client, as they are actually doing all the work. This can be considered as an hands-on education, so it has an additional value for the future. Therefore, it can contribute to convince the decision-makers to take this step. A final argument is that compliance is also one of the urgent issues, which go on during the Covid crisis, as we saw above.

It is difficult to know much about the current application of this approach in energy efficiency but during my research on the Internet I found very little. I would like your feedback to complete my conclusion about this approach in our sector. Please write to news@birdseye-ec.com on your views, objections or even first experiences. After all, we are already one year in this health crisis and I expect that many of my colleagues already found some solution.

energy transparency - rohan-makhecha-jw3
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