Masthead - Climate Control Journal

The virtue of ambition

The most environmentally friendly and cheapest energy is that which is not consumed in the first place,” says Thomas Damm, Technical Manager, Sector Department, Air Conditioning and Ventilation Technology, VDMA. This, he says, is why energy efficiency is viewed as key to unlocking the country’s objectives, namely Climate Action Programme’s 2020 interim target of a 40% reduction in greenhouse gas emissions compared to 1990 levels, as well as those under the German National Action Plan on Energy Efficiency (NAPE).

With the building sector accounting for 40% of final energy consumption in Germany, and around one-third of greenhouse gas emissions, Damm says, the sector plays a key role in the country’s comprehensive energy and climate policies. “To this end, the German government has set itself the ambitious goal of achieving an almost climate-neutral building stock by 2050,” he says. “This means that primary energy requirements will be reduced by 80%, compared with 2008.” To achieve this, Damm says, the energy requirement for heating and cooling, as well as for ventilation technology, must be significantly reduced through efficiency measures and the share of renewable energies, in meeting the remaining demand, significantly increased.

With European and national laws impacting air conditioning and ventilation technology, Damm says the challenge for politics and the industry is to decouple CO2 emissions from economic growth. “In Germany, in addition to the Renewable Energy Sources Act (EEG), the German Energy Saving Ordinance (EnEV) is primarily relevant,” he says. “The latter implements Energy Performance of Buildings Directive (EPBD) nationally and defines energy requirements for buildings and the technical building systems and installations contained therein. In addition to air conditioning and ventilation technology, this includes heating technology.”

Citing the September 2018 prohibition of the marketing of high-voltage halogen lamps in the European Union (EU) as an example of the continuous impact political programmes have on technologies’ market viability, Damm highlights the political will in the EU to steer markets toward its environmental agenda. Jens Schuberth, Umweltbundesamt (UBA; The Germany Environment Agency), believes German HVAC manufacturers are
on track when it comes to complying with regulations, due to the time afforded to them prior to the implementation, based on observing new product lines, with features reflecting the new requirements.

Forces driving manufacturers’ compliance

While Schuberth says market compliance is also reflective of Germany’s recognition of EU directives as a member state, Damm adds that voluntary adoption can also be attributed to system operators’ move to cut operating costs. “The continuous increase in the number of central ventilation and air-conditioning units equipped with heat-recovery measures, shows that this can also be done without bans,” Damm says. “Numerous factors can be decisive here — rising energy costs, certification systems for buildings user requirements or financial support measures by the public sector and/or state financial institutions.” Ultimately, Damm says, it is a mixture of instruments, constraints and incentives from stakeholders.

David Miller, Managing Director, Ziehl-Abegg Middle East, provides a manufacturer’s perspective, saying that while, admittedly, the move towards energy-efficient solutions is influenced by political pressure, many customers are also seeing the advantages of investing in such technologies with an eye towards operational savings. “When it comes to design, people are changing their ways,” he says, “which is positive in our point of view.”

Markus-Erich Strohmeier, Senior Executive Vice President, Siemens Building Technologies – Middle East, echoes the need to comply with customer requirements. “When considering cost, we believe it’s important to take into account the lifecycle of the technology and the impact it will have on the efficiency, availability, reliability and operating costs of a customer’s infrastructure during that time,” he says. “Ultimately, we want to ensure that our customers have all the data they need to make an informed choice regarding a product or supplier.”

Bissan Abbas, Managing Director, Techem Energy Services Middle East FZCO, adds that the growing attractiveness of energy-efficient solutions over conventional systems is also driven by rising costs in bigger cities over the years and that compliance with regulations has encouraged stakeholders to thoroughly study ROI to reach a break-even point.

The need for more stringent market surveillance and enhanced efforts towards IAQ

Overall, Damm says that manufacturers view regulations as positive tools for market transformation, towards more efficient products and systems. “It has also been shown in the past that German companies, in particular, with their highly developed products, manufactured with very good quality, have a market advantage — albeit limited in time — over competitors from outside the EU.” This advantage, he stresses, would be even higher if the market surveillance stipulated by the European legislator and given to the EU member states for implementation is carried out.

“However, the system is unfortunately weak and also makes market access possible for products that do not comply with EU law,” Damm says.

Schuberth echoes this, adding that despite energy efficiency inspections on air conditioners having been introduced in Germany as early as 2007, as part of the EU [Energy Performance of Buildings] Directive requirement, this has not been carried out to the extent necessary or expected. The inspections, Schuberth stresses, aimed to identify areas of improvement for building owners, in order to present them with the most economically attractive solution. “Three years ago, Germany started to register all inspections,” he says. “Only one-tenth of the inspections that people expected were carried out. So, there is quite a lack of surveillance and this is a great potential to improve air conditioning and ventilation.”

Another potential area of improvement that Damm believes requires greater attention is IAQ, which, he says, merits the same enthusiasm afforded to energy efficiency. “It is well known and proven that good IAQ is profitable in many ways,” he says, pointing to the indoor comfort in offices, shopping centres and schools, “but currently there are no legal requirements yet related to IAQ in residential and non-residential sectors.

What is there are recommendations from the WHO and the Federal Environment Agency in Germany. However, these are merely recommendations, compliance with which is not mandatory.” Damm says that this is incomprehensible, given that people spend most of their time inside buildings, arguing that much has already been said about the importance of energy efficiency.

Damm stresses that it is important that IAQ and energy efficiency are not considered separately or played off against each other. “The filter industry shows and proves it,” he says. “High-quality air filters enable a higher IAQ, with comparable or lower lifecycle costs over the service life of the filters. And this also applies to higher acquisition costs compared to lower-quality air filters. Improving the efficiency of air filters can help to ensure that IAQ does not remain a stepchild.”

Germany is not sitting on its laurels, as new regulations are underway that could potentially address these gaps. Damm says manufacturers and users are eagerly awaiting the new revision and redesign of legislation for buildings and technical installations, which has been announced by politicians for some time. “Specifically, the existing national legal provisions of the Energy Saving Act (EnEG), the Energy Saving Ordinance (EnEV) and the Renewable Energies Heat Act (EEWärmeG) are to be combined into a new regulation,” he says. “This awaited regulation is called the German Energy Act for Buildings (GEG).”

Schuberth says the lack of market surveillance and inspections could be addressed by the new regulations, recommending more effective controls over the energy performance certificates of the buildings. “There is the idea to have information in the building certificate of existing air conditioners that had to be inspected,” he says. “If the energy performance certificate were to be controlled, they could ask for inspection of air conditioners. It’s quite an indirect way that we hope could have some effect.”

Schuberth says that, additionally, gaps in market surveillance could be addressed by making air conditioners smarter, through the integration of monitoring equipment that detect operational efficiency and report to building owners in the event there are deficiencies. While promising, Schuberth says, this would be mainly applicable to new air conditioners.

Industry 4.0: The inevitability of the Internet of Things

With this recommendation, Schuberth touches on another observable trend in Germany: digitalisation. Citing “Industry 4.0” as the buzzword for 2018 in Germany and Europe, Damm says the advancing digitalisation in production and enhanced communication of devices offers new possibilities towards greater efficiency.

Miller shares a similar observation, reporting that customers are demanding more from their products. “The buzz word is cyber-physical systems,” he says. “Everything speaking to each other and manufacturers offering a lot more feedback that we did in the past.” Miller says this has prompted Ziehl-Abegg to work towards having the capability to connect networks to physical devices, such as sensor fans, frequency inverters and motors, to monitor health and efficiency. “This is an exciting time for us in terms of innovation dictated by our customers and this shift towards energy savings,” he says.

Strohmeier highlights how digitalisation is changing “the way we plan, design, build and operate infrastructure”. He says, “We see technologies, such as augmented reality and virtual reality increasing efficiency over the whole lifecycle of a building. Remote access, maintenance and servicing is gaining increasing relevance, and indoor positioning technology also has the potential to revolutionise the way we manage our infrastructure.”

Strohmeier stresses that Building Information Modeling (BIM) is a key topic that will have significant impact on the HVACR market.

Damm describes BIM as a developing tool for the optimised execution of construction projects. “BIM can and should consider all phases,” he says, “In the best case, BIM accompanies a building or plant from the first stroke of a pen to its demolition.” Damm stresses that through BIM, planning can be done in a cost-effective way to avoid typical building hazards and problems, such as, for example collisions of ducts and tubes, which can be identified early on in the design phase, and addressed by developing and implementing the most suitable solution. He adds that BIM also helps data management to optimise operation and maintenance. “Functioning BIM projects, which are kept up-to-date over the entire period of time, can prevent losses of important information, such as design calculations, design and construction plans or product documentation,” he says. “BIM is a growing system into which all participants must contribute. Anyone who deals with BIM and its possibilities will recognise the opportunities and risks.”
Rolf Werner, Director Application Engineering, Wieland, weighs in, saying that he believes that Germany is, in fact, lagging behind other countries in terms of automation, especially when it comes to BIM. However, Werner commends the platform’s ability to supply necessary data for an integrated process.

Enablers of energy efficiency

While the country still has some way to go, Damm says German companies’ commitment to sustainability has helped paved the way for manufacturers to be technological leaders, globally. “The applicable regulations and their enforcement in the market have a major influence on the use of sustainable technology outside the EU,” he says. “It is clear to see that numerous states in the Middle East are using ordinances and technical regulations as basis for buildings and technical building systems to become increasingly more efficient.”

To underscore his point, Damm says that in the first half of 2018, North Africa and the Middle East accounted for approximately three per cent of air-handling technologies’ total exports. Damm adds that sales of the German air conditioning, ventilation and refrigeration technology industry are expected to grow by a total of five per cent in 2018. Calling German manufacturers, “enablers” in the sector, Damm says, it is only a matter of time before the efficiency wave also reaches farther regions of the world.

Microgrids enhance a region’s resilience

Could you provide a first-hand account of Superstorm Sandy, and how Princeton served the community through its microgrid?

The hurricane moved its way up the eastern seaboard of the United States, and as it approached campus, it took down trees, affecting power quality and reliability. Soon, it caused the utility power to go out, and as the voltage dropped, our plant shut down. However, the microgrid was able to self-restore, and we used the power to restart power supply to the campus. So technically, we were without power for only 15 minutes. The tricky situation here was getting administrative permission to isolate the campus from the rest of the power grid. Because we had cogeneration on site, we were able to separate and shut off the less important loads on campus. We ran separately from the power grid for days. We told people in the community, if their house is cold, we had set up cots and that they could come and rest at the University. However, most importantly, the first responders – that is, the firefighters and the police – were able to come to the university and get a meal and recharge their phones and radios. They were able to have meetings and decide what they should work on next, before getting back on to the field. The important takeaway here is that you don’t need every single place to have a microgrid, but if you have one occasionally, scattered throughout a community or region, it does make a huge difference.

Microgrids reportedly lower energy costs for customers. How much, though? Are the savings significant to overcome capex barriers?

The big savings come from the fact that microgrids enable cogeneration, thermal storage and other cost-saving opportunities. We generate a lot of power whenever the grid price is higher than our marginal cost to generate. We purchase a lot of power whenever the grid price is lower than our marginal cost to generate. That way, our campus customers enjoy the benefit of the lesser cost. Savings relate to dozens of factors and are very specific to the location, the grid and the energy needs being served. Payback may take from five to 15 years, depending on these factors. Or, under a power-purchase agreement, the savings may be immediate. In any case, though, the lifecycle savings are far more than the capex. Fewer microgrids would be built if they weren’t. Even utility customers outside the microgrid save a little money if they pay real-time utility rates, because our generation has the effect of slightly lowering the total net cost of power on the grid. That is, establishing a microgrid is a win-win for all customers, not a zero-sum game.

Ted Borer, Energy Plant Manager, Princeton University

You describe microgrids as distributing risk into smaller pieces, whereby grid reliability is improved. Could you please elaborate?

Imagine there are two large utility generators serving a region. Each is capable of generating enough power to serve the grid by itself – that is, 100% redundancy. It’s easy to picture scenarios where those generators, or the substations or the wires between the plants and the ultimate customers are damaged. There are a few points with high vulnerability in the system that could interrupt service to large portions of the region. Alternatively, if we reduce the size of the two plants and scatter several microgrids around the region, it is possible to have the same (or less) total installed generating capacity, while increasing reliability.

Microgrids, as per your description, reduce both energy use and peak demand and work well with CHP to greatly increase energy efficiency. This means they can widely be used as the system of choice, or do they work well only in some applications?

Microgrids would work everywhere, but they are not financially attractive and make no sense in some places. For instance, at home, on a tiny scale, you could buy two different-sized generators; however, you might spend five times as much if you run the air handler, the oven on self-cleaning mode, the welding machine and other appliances that use electricity. It’s not about what’s possible, but whether it is cost-effective and a sensible use of your financial resources. For instance, with regard to installation and maintenance, right now the utilities provide electricity to us, and you don’t need to worry about it. But if you decide to build yourself a microgrid, you need to begin doing what they (the utilities) have been doing. You need to make sure it’s safe and that you know how to operate and maintain it. You need to make sure that you have good fuel and that the fuel is of good quality. So by establishing a microgrid, you have taken on a lot more responsibilities and you get greater benefits. You have to ask yourself, “I am going to spend some money, but is that money going to be worth it?”

Could you elaborate on the economic motivation to conserve energy and how the scenario with regard to price and energy is different from the Middle East?

In Dubai, for instance, the price of electricity is the same all day and all night; whether you’re a residential customer or commercial, it’s the same price. In our state, in New Jersey, the price of power for residential customers never changes, but for commercial purposes it changes dramatically, as fast as five minutes. It’s not rigorously a demand charge but more of an energy charge that changes every five minutes. In the middle of the night I might pay two cents per kilowatt-hour and in the day I may pay 25 cents per kilowatt-hour, so it could be 10 times as much. We have a very strong economic motivation and use as much energy as we can during the night in order to avoid the amount of energy purchased during the day.

Could you elaborate on the University’s control platform, which reportedly works relative to the energy needs of the campus in accordance with grid and weather conditions to forecast the corresponding load?

The control system advices us and helps us predict when electricity is going to be expensive and cheap. It is a combination of a software along with many meters, where we look at temperatures, pressures, flows and energy use through all the major equipment on campus. It is not rigorously an IoT-powered system, because when I think of IoT I understand it to be hundreds and thousands of data points connected to a system. In our system, we have a few hundred data points. I mean one temperature signal, a pressure signal, while the rest are sensors. The sensors are not scattered and are not radio transmitters; they are Bluetooth-enabled and hardwired directly back to the campus.

You say that existing generation assets can be operated in new ways for additional revenue with little capital investment. Could you please elaborate?

Yes. We built our cogeneration system in 1996. It wasn’t until 2003 that power was deregulated in our state of New Jersey. At that time, it became more lucrative to generate more power during the day and less power at night. We used the same asset fewer hours per year and generated more savings. More recently, the power grid has established a market for frequency regulation. By modulating the output of our existing gas turbine in response to a grid frequency signal, we are able to help support the local grid frequency. We get compensated for this activity at about 3x the price of power. It is a new revenue stream, same asset. It is a minor investment in controls.

Microgrids provide self-sufficiency and resilience especially in emergency situations. How can they be applied in the United Arab Emirates?

We put in cogeneration not because of reliability issues but in order to save us money. A collateral benefit is that it also gives us reliability and resilience in crisis. I believe that the power supply in the United Arab Emirates is very reliable and very good, so there’s nothing to take away from that. But every once in a while, we still expect that there might be a problem, something that might take out the energy supply, and it would be nice to have spots of enhanced reliability. Having microgrids at critical locations, such as police centres, firefighting stations and hospitals, is crucial. The United Arab Emirates could benefit from cogeneration, not because the power is unreliable but firstly to save money and also to be more efficient. The power plant by itself might be 25-45% efficient, but if you do cogeneration, you could even do 75-80% efficiency. Hence, I am not concerned with who owns it; it could be a government or a utility or even a privately owned microgrid. Even with technology, you can use chillers, gas turbines, jet engines or diesel fuel.

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