Compact water-air units
If the temperature of the loop drops to below a value between 8ºC to 10ºC, the units that heat the loop (boilers, heat pumps, etc.) will activate. If the temperature reaches above a limit value of between 20 to 30ºC, the cooling units in the loop (cooling towers, etc.) will activate. It is also interesting to consider free cooling strategies that use drycoolers, for when the outside temperature is lower than that of the water loop when the predominant demand of the rooms is to be air-conditioned. The principle of the installation consists of a closed loop, where the water is circulated using a circulation pump. Via this loop, water is supplied to each shop and provide the required temperature through energy exchange. This type of system is often found in shopping centres that house a number of shops. It is particularly well adapted to buildings that require the simultaneous heating and cooling of seperate zones. Only units which meet requirements for heating, air conditioning or ventilation will operate and therefore consume energy. To maintain the temperature conditions of the water loop, units for heating (boilers, air-to-water heat pumps, etc.) or for cooling (drycoolers, cooling towers, water chillers, etc.) are generally used. In this way, the temperature of the water is maintained within the established limits that allow air-to-water units to operate with high energy efficiency and to minimise the overall energy consumption of the installation. The control of these systems adapts to create the optimum temperature conditions for the water loop. Air-to-water units that operate in cooling mode transfer the energy to the loop and those that operate in heating mode extract the energy from the loop. This means that at times the two effects compensate for each other and variations in temperature occur within the established limits, so that it is not necessary to operate the units that are responsible for maintaining the conditions of the loop. In this regard, the existing inertia of the water loop also plays an important role.
AND HYDROTHERMAL ENERGY
Convinced that air conditioning using geothermal energy with low enthalpy is an alternative to conventional sources, CIAT places strong emphasis on this system. The Neptus XP units integrate simply into all types of installations. This option consists of drawing on natural energy (rivers, wells, etc.) using low temperature sensors or groundwater pumps: Open-circuit (rivers, wells, etc.). Horizontal geothermal exchangers with closed circuits. Geothermal exchangers closed circuits. with vertical drilling and
Electrical consumption Heat extracted from the building
Heat dissipated into the ground
Water-to-air units can be connected to systems that use water as a heat-transfer medium. This allows for significant savings as there is no need for additional auxiliary units (boilers, drycoolers, heat pumps, etc.). In addition, the stable, controlled temperature of the external energy source allows units to operate with high levels of seasonal efficiency. In heating mode the energy is drawn from a thermal source. In cooling mode a cold source is used.
Electrical consumption Heat is brought to the building
Heat extracted from the ground
HEAT PUMPS - AIR CONDITIONING - REFRIGERATION - AIR HANDLING - HEAT EXCHANGE - NA 17.01 A