Tender reference number
ZAS TGE03-01
Description
Description: In the project ‘Reconstruction and modernisation of the Darmstadt waste heat and power plant’, several ventilation and partial air conditioning systems of the building stock as well as in new building parts of the BT01 and BT02 components are required at the site. The main requirements of these installations are as follows: • Dissipation of heat energy generated by warm surfaces of plant technology (combustion lines). • Transfer of the amount of air into the boiler house, which is required as combustion air for the combustion plants (secondary air). • Ensuring freezing in the event of plant downtime. A distinction is made between two areas that are ventilated and each considered to be a contiguous airspace. 1. Component 01 Ventilation systems Boiler house: (see also scheme "G5-LS-01-00-025-00-000_ventilation_scheme_BT01") This area consists of a total of 6 supply air ventilation systems with an air volume of 345,000 m3/h. This air volume is extracted via 17 exhaust air fans below the ceiling of the boiler house. Supply air ventilation systems: • U1 main steam vane • U1 compressed air central unit • U1 building services • E1 locksmith's warehouse • E1 feed water BT17 • E6 boiler house exhaust air fans: • E9 Exhaust Air Group North • E10 Exhaust Air Group South 2. Ventilation systems BT01-BT02: (see also scheme "G5-LS-02-00-026-00-000_ventilation_scheme_BT02") This area receives two ventilation systems, a supply air LA with 166,000 m3/h and an exhaust air LA with 67,500 m3/h. These systems have a WRG circuit system to warm up the supply air in winter with the heated exhaust air, so that freezing in the building can be guaranteed. The difference in air volume between ZUL and ABL is conveyed from the building by process-side fans (DRO extraction hood, secondary air line 4; Tissue filter line 4) and balanced by the new roof fans (each 24,500 m3/h) above line 5. Ventilation systems: • E7 roof supply air system BT01 / BT02 • E7 roof exhaust air system BT01 / BT02 roof fans: • E10 Exhaust air roof fans Control concept: In both areas, the ventilation concept envisages dissipating the waste heat from the plant technology via the continuous and exhaust air systems in the higher levels. At the same time, the combustion plants draw so-called secondary air from the indoor air surrounding them. Fresh, cool outdoor air is introduced into the lower levels of the buildings via the supply air systems. The regulation of the installations in both areas is therefore divided into two types. 1. Temperature control: The temperature of the hall is controlled by the supply air systems. Several temperature sensors are planned in the zones of influence of the individual supply air systems. Depending on the prevailing average values, the respective supply air quantity is regulated. In addition, temperature sensors are provided in the exhaust air area. If the average temperature of the halls is too high, the air volumes of the lowest levels are gradually increased. In winter, the heating registers in the ventilation systems "U1 main steam vane" and "U1 building technology" ensure frost-free supply air in the boiler house. The same function is performed by heat recovery (KVS) in component 01 / component 02 for this area. However, this is only about keeping the air outside the frost zone, an additional heat input is not necessary. 2. Differential pressure control: The exhaust and exhaust air systems are controlled according to the differential pressures of the halls compared to the atmospheric pressure, with the aim of keeping a low negative pressure. They thus compensate for the fluctuating supply air quantity depending on the temperature, as well as the fluctuating secondary air extraction of the process. To determine the prevailing differential pressure, several transmitters are placed at strategically meaningful points and an average value is formed. Due to limited space and work at high altitudes up to about 40 m above ground level as well as in rooms with higher temperatures due to waste heat from combustion sites (e.g. in the boiler house) difficult conditions are to be expected during implementation.
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Submission Method
Electronic via:
https://www.subreport.de/E55911125
Tenders may be submitted
Electronic submission: required
https://www.subreport.de/E55911125
Information about a public contract, a framework agreement or a dynamic purchasing system (DPS)
Not available
Conditions for opening tenders (date)
23/07/2025 12:00
Award method
Criterion:
Type: price
Description: Gewichtung (Prozentanteil, genau): 75
Weight (percentage, exact):
Criterion:
Type: quality
Description: Bezeichnung: Personaleinsatzkonzept Gewichtung (Prozentanteil, genau): 15
Weight (percentage, exact):
Criterion:
Type: quality
Description: Reaktionszeitenkonzept Gewichtung (Prozentanteil, genau): 10
Weight (percentage, exact):
Estimated value
Not available
Final contracted value
1.00 EUR
