Maintaining The Specified Air Parameters In Underground Parking Lots

To maintain microclimatic regime in car parking docs a range of parking ventilation systems can be implemented, e.g.:

  • Artificial and natural extract of fresh air
  • Artificial and natural inflow hoods
  • Mechanical supply and exhaust ventilation

A completely natural ventilation complex is rarely installed in car underground car lots, because such systems largely dependent on weather conditions, plus they demonstrative poor performance during peak hours, when air exchange is demanded most.

A mixed ventilation (natural and mechanical ventilation) type is commonly used on semi-open parking lots, while a completely mechanical system is mounted in covered parking facilities.

The presence of CO (or carbon monoxide) components in the air may be dangerous for the health and even lives of people. Carbon monoxide is released during the process of burning, but in the cities and parking lots in particular, the main sources of hazardous gas generation is represented by automotive internal combustion engines. Carbon monoxide is dangerous because a human cannot sense of smell it, naturally taking no take steps to leave the danger zone. CO entering the lungs rapidly enters the blood and gets in contact with the hemoglobin, whereby the oxygen transfer is blocked at the cellular level, causing asphyxiation.

The ventilation management is oftentimes automated to optimse the performance of the mechanisms. Keeping the car park ventilation system enabled permanently, even with a small number of cars parked, is a waste of money. A decent ventilation system is packed with automatic sensors and controllers, so the system can turn on the necessary component separately at any time, for example, based on the analysis of air on CO presence.

The Benefits Of GRC-based Cladding Panels

Glass reinforced cladding panels are used mainly for architectural purposes and provide a spectacular opportunity for the expression of individuality in design, which no material can offer. A rare combination of features and capabilities of glass reinforced concrete allows:

  • Creating non-standard products customized for non-standard buildings
  • Creating modular elements for serial unified construction
  • Using GRC as a facing material in new facade panels mounted directly on top of the old building’s facade

Technically, this can be implemented with respect to any individual case on the basis of at least three of the following solutions:

  • Utilising panels in the form of thin GRC shells with stiffeners
  • Utilising GRC thin shells, mechanically fastened to steel mounting frames which are then attached to the frame of the building (e.g. ventilated facades)
  • Utilising GRC shells that act as permanent formwork

Carefully constructed molds made of metal, wood, plastic or synthetic rubber give almost limitless opportunities for diversity of surface finishing, from the very strict textured patterns to the most bizarre shapes, elements and ornaments.

The combination of the basics of white or gray cement with the addition of small amounts of inorganic pigments, as well as specially selected by color sand and other aggregates from different parts of the world, creates a wide palette of colors that meets the needs of the most demanding architects.

The set of techniques for applying GRC-based materials is characterised by terrific diversity: from the most simple to the most advanced. An already molded object with a base of gray cement can be colored with a permanent coating. However, the material introduced in GRC products and forming the front finishing layer does not require special care, except for cleaning.

Complex Test Rigs Systems: The Principles Of Work

To shorten the time needed for adjustment and launching the automated systems integrated the complex test rigs are created or purchased. These rigs are designed for specific systems and allow overcoming dozens of significant issues that arise during commissioning and start-up, plus it enables the personnel to eliminate inaccuracies in project planning.

Troubleshooting the errors, associated with the complexity of conjugation with the technical means of computer control and management of the facility, requires considerable time and effort. Therefore, the device system is subjected to close to real and extreme conditions on the test rigs. The tests imply verifying the correctness of computer interaction with the sensors, actuators and devices displaying various parameters; input, processing and output of information; algorithms and programs.

In the test program on the rig a lot of attention is attached to checking the immunity of signaling channels. The effect of interference is investigated, and the areas of reliable operation of the system in terms of noise in the coefficients and their suppression in the signal path are monitored. Basing on the effectiveness of the shielding lines, the best combination of ground screens and chains of transmission channels is chosen.

Comprehensive technology rig eliminates any interference due to the presence of electric and magnetic noise in the room where the computer is established. Furthermore, crosstalk can also be identified.

The process described, especially in aerospace manufacturing or aero tooling, typically includes a full range of computers, information sources (sensors, control panels, etc.), control receivers and display devices. The test equipment can also be complemented with devices generating additional signal interference.