SPECIALISED SYSTEMS FOR CINEMA AND THEATERS

Cinemas and theatres

YOUR NEEDS

 

Efficient control of air quality

Designed to ensure strict control of temperature, humidity, and air quality, the units stand out for their possibility to change the amount of external air according to the number of people in the room. Thanks to a probe that measures the percentage of CO2, only the necessary amount of air is treated and placed in the room. Whether the room is crowded or is empty between shows, the system optimises the well-being of spectators and provides energy savings on the treated air flows.

Recovery efficiency

The units are mass produced with active thermodynamic heat recovery: the energy contained in the flow of expelled air is used to improve the temperature on the external treatment coil. Unlike traditional units with static recovery with crossover flows, the Clivet unit provides efficient recovery in any operating condition and with any flow rate of expelled air. Specific energy analyses have shown average savings of 30% on primary energy consumption, compared to crossover flow recovery.


Unit efficiency with partial loads

During the life cycle of the system, operation of the individual units at full load occurs for a very small amount of time compared to the time the unit runs at partial load. The possibility to follow the progress of the loads perfectly has been achieved by using an asymmetrical circuit in the refrigeration circuit: the low-consumption scroll compressors have different sizes and thus allow three different step levels. If outdoor humidity and temperature are ideal, the free cooling "contained" within the incoming air flow can be used in spring and autumn. At the only cost of the energy to run the fans, the unit cools the room, and leaves the compressors in standby mode, with substantial energy savings.

Cinema projection room

Efficiency of the ventilation system

In the various types of systems, electricity represents the biggest part of running costs, at times as much as 50% of the total operation. The ventilation system increases overall efficiency thanks to the use of plug fans with reversed blades, driven by a brushless direct current motor.
The advantages of using this type of fan are:
- elimination of losses due to friction in transmission
- high reliability and reduced maintenance
- the possibility of keeping the air flow to the unit supply even with progressive soiling of the filters. The comparison between a unit elaborating an air flow of 13,000 m3/h using the belt-pulley system and the same unit equipped with plug-fans has shown a decrease by 40% in the use of electricity.

Efficiency of the filtering system

With the use of electronic filters, the main energy benefit comes from load loss values which are practically reduced to zero. Compared to traditional F7 efficiency pocket filters, the electronic filters account for a substantial reduction in electricity input for the fan in the treatment zone. The electronic filters are renewable.Wash them, they regain their filtering effectiveness without having to be replaced. Their duration is therefore the same as that of the unit itself. In the analysis of a unit that treats 5,400 m3/h of air, although the initial investment for the electronic filters is greater, the following decreases are noted:
- incidence of maintenance costs (1.3% for electronic filters as opposed to 12.3% for pocket filters)
- expenses for ventilation electricity input (2.6% for electronic filters compared with 3.5% for pocket filters)

Therefore, there is a return on the investment in less than a year. The same energy analysis shows that the total energy absorbed by the unit with H10 electronic filters is 6% less than the same unit equipped with F7 pocket filters. The environmental impact also benefits greatly. The amount of CO2 produced is reduced by 7%.

 

 

SUITABLE FOR

 

Projection rooms

Independent direct expansion rooftop unit, heat pump version.

The unit is specifically designed to ensure strict control of temperature, humidity and air quality, the unit features the possibility to vary the amount of fresh air based on the number of people in the room, (by measuring the amount of CO2 in the room). The active thermodynamic recovery of the expelled air flow improves the temperature on the external treatment coil; it also substantially increases the overall efficiency of the unit. Unlike traditional types with static recovery with crossover flow static recovery, this unit provides efficient recovery in any operating condition and with any flow rate of expelled air. The unit also offers high adaptability to changes in external conditions: adjustment permits automatic change from heating to cooling operation or to free-cooling, with consequent energy savings. The use of high-efficiency electronic filters improves overall performance. Thanks to their reduced load losses, these filters substantially reduce the amount of electricity used for ventilation. Extreme compactness makes it possible to resolve issues of rooftop installation, thus allowing work to be completed more quickly.

Synergy in design and functionality

 

Projection corridors

Independent direct expansion rooftop unit, heat pump version.

This unit controls the correct cooling of the projectors by means of intake of the correct amount of outside air, ensuring perfect operation of the equipment and greater comfort for operators at the same time. The unit is configured with a supply fan, which allows extraction through the towers with which each projector is equipped.

 

Foyers and catering area

Independent direct expansion rooftop unit, heat pump version.

This unit is designed to deal efficiently and rapidly with the variations in load that are typical of the foyer area. The number of people therein tends to vary, and there is a high heat load due to monitors, lights, and ticket counter staff. The unit also ensures excellent fresh air, so that odours from the catering area are promptly removed. Its configuration includes two ventilating sections (supply and return/expulsion), which provide a proper balance of the play in pressures between the foyer and the projection corridor.

 

System management

Centralized management and supervision system

All of the MultiSystem units are set up for connection to a centralized control system for the air conditioning of the entire facility. The desired parameters for temperature, humidity and air quality are easily and functionally set for each room. A troubleshooting system along with rapid servicing times makes it possible to optimise service and ensure constant working reliability. On request, MultiSystem also supervises the entire building through a specially developed and customized 3D display. The user can browse through graphic pages providing a three dimensional representation of the systems from a workstation, thus obtaining an overall view of the situation in the multiplex.

Application examples

» Cinema 7 screens


Warner Village “Valecenter”
Marcon, Venice - Italy
Year 2000 · 7 screens

Warner VillageThe multiplex which was built in 2000 in Marcon, just inland from Venice, marks a turning point for this major American cinema group in the choice of the type of air conditioning. This facility saw the
change over from centralized hydronic systems to the innovative proposal from Clivet, composed of packaged units with direct expansion, fully independent. Warner made this choice based on
the possibility to limit operating costs by using this system, with substantial savings for the entire life cycle of this system.

The scientific community has also shown considerable interest in this aspect. The Department of Technical Physics of the University of Padua monitored the performance of the air conditioning system in one of the auditoriums for one year in order to scientifically evaluate the operation of the machine in serving that room.

The study confirmed the excellent behaviour of the unit for uses in places with varying degrees of persons present over time. The result of the research documented that the use of an electric heat pump allows maximum exploitation of the multi-hour rates.

» Theatres


Theatres Politeama Rossetti
Trieste - Italy


teatro Politeama RossettiAs stated previously, theatres are the permanent emblem of the cultural and social prestige of a city.
For Clivet, it was a fulfilling challenge to provide air conditioning for a building such as the Politeama Rossetti in Trieste, for the unquestionable architectural and cultural value of this historical
theatre.

The building was constructed in the style of the late 1800’s. IT required the use of equipment rooms, while its location in the heart of the city made the issue of environmental impact important. This required units that are compact, technologically advanced, highperformance and quiet.

It was also essential to ensure ambient and acoustic comfort for the audience, while minimizing energy consumption.

The solution implemented by Clivet ensured the use of a sturdy, self-adapting, high-efficiency unit gives the best trade-off between maximum performance and minimum “Total Life Cycle Cost”.

An added value of this solution was the dramatic reduction in overall noise level of the system.

» Cinema 7 screens


Warner Village
Metropolitan
Napoli - Italy

cinema metropolitanThe unique system conditions of this multiplex made the design study even more challenging, and its completion was all the more satisfying.
Various types of constraints that were encountered included:
· tight, hard-to-reach technological areas
· Very strict and limiting fire codes for the construction of the heating plant
· requirement for systems to be housed in the existing volume
· limitation of outdoor emission of combustion by-products
· restrictions on external noise levels
· Space available on outside only for fresh air intake and expulsion

The structure housed a number of stores which actually made it a shopping centre. The existence of an old well ensured supply of a substantial amount of water. This discovery guided planning in the direction of WSHP (Water Source Heat Pump) decentralized system. Therefore, packaged water-cooled units in heat pump version were used between the source (well water) and the user (air conditioning unit supplied with water of the loop).
The WSHP solution provided the simplest and most efficient air conditioning for the 7 auditoriums, the foyer with refreshment area, the projection corridors and the shopping centre. The choice of this solution rather than the traditional hydronic system made it possible to:
· Optimize construction times as a result of greatly simplified plumbing networks and air conditioning units that were already tested and ready for installation
· ensure high level of machine efficiency resulting in energy savings
· use groundwater as a renewable, free energy source.

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