Effectively manage the temperature within buildings
The ambient temperature in the workplace is essential to ensure that employees feel comfortable and can work in optimal conditions. It should be adjusted according to the activities carried out on site.
Energy consumption for heating can fluctuate depending on the weather and due to air leaks in the building envelope, especially when it’s poorly or not insulated. For more information on ways to improve the building envelope, please refer to the measure Improving the energy efficiency of the building envelope
In order to protect personnel from exposure to solvents and to eliminate their accumulation, thereby reducing the risk of explosion, the air inside the paint booth is filtered and extracted before being discharged into the atmosphere. The air released into the atmosphere is replaced by fresh air drawn from outside. This air is then heated and use as renewal air in the paint booth.
The measure aims to install a plate heat exchanger in the hot air extraction circuit of the paint booth to preheat the renewal air and will significantly reduce the energy consumption associated with heating this air.
The measure can lead to a substantial reduction in heating consumption and therefore also reduce the associated greenhouse gas emissions. The installation of this technological innovation requires a production shutdown for implementation and would entail a medium-to long-term return on investment.
The use of traditional sectional doors in the industrial and automotive sectors is often a source of significant heat loss and discomfort for personnel. This is mainly due to their high frequency of use and the length of time they remain open. Often, for the sake of simplicity and time saving, doors are left open for long periods.
Thanks to their automated opening enabled by presence detectors while minimising opening and closing times, the doors help improve indoor temperature stability and reduce temperature fluctuations. Reducing large temperature variations also prevents heating and air conditioning system from repeatedly switching on and off, which can cause malfunctions and reduce system reliability.
This measure can lead to a reduction in annual heating consumption of more than 30% and proportionally reduce greenhouse gas emissions. The installation of this easy-to-implement technology does not require a production shutdown and would offer a fast return on investment.
Replacing a gas, oil or electric arc furnace with a magnetic induction furnace
The project consists in replacing an existing furnace that runs on gas, oil or electric arc with an induction furnace using a strong alternating magnetic field, created by passing a current through a coil wound around the furnace. The magnetic field then generates a potential difference across the furnace, inducing a current in the metal. The resistance of the metal to this current generates heat (via the Joule effect), allowing it to melt.
The measure can lead to a reduction in the furnace’s energy consumption compared to other technologies and reduce greenhouse gas emissions if the replaced furnace used fossil fuels. The installation of this technological innovation requires a production shutdown and would entail a medium- to long-term return on investment.
The project involves fitting professional kitchen extractor hoods with heat recovery systems on the exhaust air fan. This recovery can be performed in three different ways:
via an air-to-air recuperator integrated into the hood which propels the preheated air into the kitchen (integrated compensation).
via a separate air-to-air recuperator which also allows the make-up air to be preheated through a plate heat exchanger.
via an air/water heat recovery unit to pre-heat domestic hot water
The company will be able to save an estimated 70-100% on heating consumption in the kitchen, and around 50% on domestic hot water production, by installing this technology, which has been on the market for over 5 years. However, implementing this measure can be complex with a medium-to-long-term return on investment, and requires the temporary shutdown of production during the technical installation stage.
Utilization of condenser heat for domestic hot water production in a restaurant.
A refrigeration cycle works by drawing heat from the evaporator and discharging it to the outside (condenser). The project’s idea consists in recovering this heat to be discharged to preheat domestic hot water (DHW), which is necessary in every restaurant. The exchanger is placed between the compressor and the condenser of the cooling unit.
In practice, recovery can be implemented in three different ways:
Via external exchanger: an exchanger is connected on one side to the compressor outlet and on the other to the hot water tank (partial recovery).
Via internal exchanger: a “desuperheater” through which the refrigerant flows are inserted at the bottom of the hot water tank upstream of the condenser.
Via condensation water collector: all the refrigerant is condensed inside the hot water tank (total recovery).
By installing this technology, which has been available on the market for more than 5 years, the company can save significantly on its energy bills, and even cut its hot water consumption, which will result in reducing its carbon footprint (the benefits will depend on the initial mode of domestic hot water production). However, implementing this measure can be complex and taking into account energy costs alone may not be sufficient for a return on investment. It also requires temporary production shutdown during the technical installation stage.
Decentralisation of domestic hot water production with or without thermodynamic water cylinder
The project consists in separating the hot water production system from the heating system. This can be done in two ways:
through partial decentralisation in summer, by adding a small boiler to heat the domestic hot water. It will allow to shut down the main boiler in summer but will still be connected to the hot water system. Decentralisation can also not be total if the domestic hot water production system is separate, either following the installation of a thermodynamic water cylinder operating at high temperature (advantage of the COP on electricity consumption linked to the production of DHW compared to an electric boiler)
through the installation of a boiler sized to cover the DHW requirement, or the installation of suitable electric boilers with storage capacity to limit power demand peaks.
This technology is particularly suitable for hotels with a high demand for domestic hot water. Setting up this new technology will allow the company to save energy, while reducing its carbon footprint. However, implementing this measure can be rather complex with a medium-to-long-term return on investment, and requires the temporary shutdown of production during the technical installation stage.
Heat recovery via heat pump on grey water or cooling circuit
The project consists in recovering the heat lost in the grey water system (showers, sinks, washing machines, dishwashers, etc.) of a hotel or restaurant by reusing it to heat domestic hot water (large consumption in such facilities). The process involves the recovery of heat via a water-to-water heat pump from a cold source at high temperature throughout the year.
This technology is particularly suitable for hotels with a high demand for domestic hot water.
By installing this technology, which has been available on the market for more than 5 years, the company can save on its energy bills and reduce its carbon footprint. However, implementing this measure can be rather complex with a medium-to-long-term return on investment, and requires the temporary shutdown of production during the technical installation stage.
Heat recovery from the condensers of the refrigeration units to preheat domestic hot water (DHW)
A refrigeration cycle works by capturing heat from the evaporator inside the cold rooms, to subsequently discharge it towards the condenser outside the building. This project aims to recover this heat to preheat domestic hot water (DHW) which is a must in all butcher shops. To do this, a heat exchanger is installed between the compressor and the condenser of the refrigeration unit.
This measure could reduce energy consumption and carbon emissions by 10 to 30%, thereby significantly reducing or even eliminating energy demand for domestic hot water (DHW) production. However, its implementation is complex and will require a temporary production shutdown to during the installation.
The heat recovered from the condensers of the refrigeration units is used to heat domestic hot water. It is a refrigeration cycle that works by drawing heat from the evaporator and discharging it to the outside (condenser). The idea behind the project involves recovering this waste heat to preheat domestic hot water (DHW).
This technology is suitable for food businesses with refrigeration units (cold rooms, refrigerated units, air conditioning, etc.).
By installing this technology, which has been available on the market for more than 5 years, the company can save on its electricity bills and reduce its carbon footprint. However, implementing this measure can be complex with a medium-to-long-term return on investment, and requires the temporary shutdown of production during the technical installation stage
