Electricity Heating - Ventilation - Plumbing - Sanitary

Electricity Heating - Ventilation - Plumbing - Sanitary, necessitated by the construction of a school group on MONTAUBAN, classified as a school receiving public E.R.P, as an educational institution

less than 300 people,

Space heating will be provided from a heat pump associated with vertical geothermal wells. The power of the heat pump was determined to allow space heating to a temperature of + 5 ° C outside, which corresponds to more than 90% of the heating time over a year. The additional heating will be by direct electrical energy.

its needs take into account the future extension

The geothermal probes will be filled with brine.

The network will be equipped with double pumps allowing the circulation of the fluid in the probes. The pumps will be at constant speed, installed with anti-vibration flexible sleeves in technical room

The heat pump will be of the brine / water type. It will be of the type NECS-W 202 H, brand CLIMAVENETA

Heat output = 68 kW

An electric boiler will take over the heat pump by providing the additional energy required when the outdoor temperature is below + 5 ° C.

This boiler will be connected in parallel with the heat pump and will operate in cascade. Its operation will be authorized by the GTC only from an outside temperature below + 5 ° C. It will then start when the starting temperature of the heat pump drops below the set point

Power = 48 kW

The boiler will be equipped with a recirculation pump to keep a minimum flow in the boiler, in case all the flow passes through this 3-way valve.

The operation of the boiler and the heat pump will be of the cascade type with 2-way valve on each network.

The installations will be dimensioned for the following climatic conditions:

Zone: H2c,

è In winter:

. Dry temperature: -5 ° C

. Relative humidity: 95%

è In summer:

. Dry temperature: 32 ° C

. Relative hygrometry: 40%

2.4.4. VENTILATION OF PREMISES

Debit

Classrooms - Offices ........................... 15 m3 / h.pers

Dining room - Activities .............................. 22 m3 / h.pers

EXTRACTION:

Service rooms ....................................... .. 1 flight / h

Showers ................................................... .. 60 m3 / h

Sanitary .................................................... 30 m3 / h

The radiators will be admitted to the NF EN 442 standard.

All heating surfaces will be sized according to the following conditions:

. Starting temperature: 45 ° C

. Return temperature: 35 ° C

. Ambient temperature: according to the room

. Coefficient of overpower: 15% compared to heat losses

All classrooms, multipurpose room, rest rooms, dining room and staff rooms will be split into two streams.

The CTAs will bring the necessary hygienic fresh air to the occupants and extract in the same room.

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