Tag Archive for: energy demand

Guidelines to save energy this Christmas

During Christmas holidays, one of the most energy-consuming elements, for everyone, is the lighting of the house.

It is usual to use bright ornaments at home, which often use halogen technology, high drain. The best option is to progressively replacing it by LED technology, which preferably incorporates solar collector to run, so we are eliminating electricity consumption completely. The same happens in residential buildings with landscaped communal areas. However, in apartments we can only use LED decorative lights to save energy.

On the other hand, the most energy-consuming element during the cold months inside a home rarely focuses on lighting. Put the focus on the elements designed to heat the house, water heating, etc. such as air conditioning, the heat, central heating, etc. In that sense, it is advisable to regulate temperatures as the highest consumption occurs when there are large jumps and systems have to work twice as hard to reach the desired temperature at a given time.

  • Set the temperature between 17 and 18 degrees although we are not inside the house.
  • Set the temperature between 21 and 22 degrees when we are inside the house.
  • Set the temperature of the heater thermostat to 50 degrees in air conditioning
  • Close grids of rooms which don’t need to be heated
  • Each degree reduces consumption by 5-8%
  • With programmable thermostats to save heat, you do not need the entire volume of hot water 24h.
  • Take into account the simultaneity of consumption to avoid peak.

Save on the wrong side is to spend more for the same

In a previous post, we talked about the cost overruns in which we could incur trying to lower the price hiring our energy with a trading company. In this post, we would like to focus on raising consumer’s awareness about the importance to make the right decision when he renews, extends or replaces any system or subsystem or any element which contributes to the consumption of an installation.

SMEs struggle every day against all types of external and internal problems, subsisting in increasingly competitive and aggressive environments, where often the only element of concise comparison is the price. As energy costs have increased exponentially in recent years and is expected to continue to do so despite the steady trend of recent months, it has become one more element to consider. It is necessary that purchasing decisions take into account efficiency criteria when implementing corrective measures as well to obey technical needs, as extensions motivated by an expected production growth. If the businessman only wants to give priority to the “cost” of different offers during the purchase process over the energy consumption of those once implemented he will be mistaken, considering that when turning on the switch of what he has installed, he will have to pay the kWh consumption arising. Neither the installer responsible for the execution, nor the engineer who has designed the project, nor the manufacturer of the equipment that has sold him, will pay for him the increase in the invoice. Everyone has a different role and selection criteria should note that the above is met, but none of them will hold what we consume or pay afterwards per unit of production since only an adviser with engineering and technical advice capabilities can do this.

Applying efficiency criteria in any purchasing decision we will obtain clear advantages:

  • Ensure the return on investment by reducing consumption in the case of renovations or improvement of facilities.
  • We will have a clear forecast of energy consumption that allows us to compare between different alternatives.
  • We will reduce maintenance costs since usually selected equipment based on efficiency criteria includes the entire set of items to install: equipment, design, control elements, etc. Increasing energy efficiency means increasing productivity.
  • For every € invested we will recover a part in every kWh consumed. Therefore it is essential to apply efficiency criteria in investment over one year.

Energy efficiency is not a theoretical concept as many believe, it starts from the time when we have to undertake daily costs to upgrade facilities that use are deteriorating. The sooner we understand it, the sooner we will save energy.

Buy at a fixed price or indexed

Recently the electrical trading companies are betting on offer an indexed price, as there is a growing demand for this type of offer. It is not surprising since traditionally indexed price has always been a way to hire the most economical electrical energy.

Why is that?

To understand we can make a comparison with the banking sector. The fixed rate offered by a bank when hiring a mortgage includes detours costs and the risk of fluctuations involving loss to who sells. Indeed, a fixed price is a risk for whom provides it, such risk, let’s call it warranty, is included in the price we finally pay as an additional cost, as well for the fixed interest in the banking sector or the rate of fixed prices in the energy sector. When buying indexed price, we assume that risk. Therefore it is conceivable that it will be cheaper in the medium term. Given that contracts are signed for one year, the risk is negligible.

There is no free lunch

However, the indexed price is interesting whenever we do not charge commission high costs, also called operating costs or fee. The reasonable cost for SMEs is between 3 and 4 € / MWh hired (estimated consumption from consumer or trading company reading). Naturally this is always subject to consumption. Usually, the greater the consumption, the better trading offer.

We don’t need to understand the energy market. Let’s search a good adviser to tell us and ensure that we are paying the right price and, specially that we are optimised over our competitors.

The energy self-consumption: reality in sight

Over recent years, the term “self-consumption” in the energy sector has become more common in colloquial language, not always in a positive sense and sometimes with scepticism. Successive changes in legislation have led to confusion on the part of businesses and residential users that, either by conviction or by economic interests, were potentially interested. However, today we can say that we have reached the point where an energy production installation is equal to or less expensive than the same energy contracted to the public network. Photovoltaics, as it says Vozpopuli in its post written by Antonio Muñoz Velez,

“has ceased to be a teenager, much less a spoilt child.”

The self-consumption in Spain is finally a reality in sight.

However, some people are sceptical about real energy savings of a photovoltaic installation, or even if the return on investment makes it interesting to consider this technology. It is shown that a facility today can run completely autonomously through the different systems that exist, but it is true that pretending to supply 100% of the energy demand of any facility can still be somewhat expensive and lead to periods of more distended amortisation so users would be willing to assume. So the question must be asked: do we really need to supply 100% of our energy demand? To see a specific case, if your house is in an area of difficult access to public electricity supply you will need to produce the energy it consumes fully your own way, so it will end up producing 100% of what you need to consume. On the contrary, if you do have access to the public network, it would be possible to establish a project of photovoltaic energy consumption by only provides a part of the energy demand. That way you can save a significant amount in the initial project cost and even significantly reduce the return period.

The same would happen in an industry or a services facility. If further installation requires more energy during the day, its consumption occurs primarily during daylight hours, it is much easier to get this cheaper because it does not need to store energy using batteries that considerably increase the project cost as a whole. In fact, as national legislation is today, according to RD900/2015 based on an earlier draft, the known Net balance which in theory allows pouring into the public network surplus energy produced is not allowed in Spain. This is an additional argument when considering how to maximise the energy produced, if we decided on photovoltaics instead of producing surplus and stored in batteries.