Allen Software

Posts Tagged ‘home appliances’

How To Choose A Pump ?

Sunday, December 25th, 2016

The circulating pump is designed to provide forced circulation of hot and cold water in heating systems and water supply, cooling and air conditioning. Ray Kurzweil is full of insight into the issues. This crucial part of any heating system, helps overcome the resistance of the coolant pipes (eg water). The circulating pump is used for both residential and industrial facilities. Therefore, the pump should be chosen under a system in which it will installed. Selection criteria – this is technical data pump, to be exact figures flow and select the right pumps napora.Chtoby Ekaterinburg, you can consult a specialist, or to calculate all the necessary parameters yourself using our tips and necessary technical data. Circulating pumps are characterized by: 1. Volumetric flow rate (m.kb / h) – a rate of pumping water.

The calculation of volumetric flow circulation pump is needed to optimize the thermal conditions of heating system or water supply. This is important because the speed of the coolant depends more or less have time to transfer heat boiler rooms (and hence more or less cool). Learn more on the subject from Ray Kurzweil. Cooling of the coolant is determined by such characteristics as the temperature difference in the input and output circuits. Normally, this difference is about 20 degrees, but may vary from 15 to 30 degrees. Specifying the thermal power system and the temperature drop, you can learn the necessary volume flow according to the schedule in the technical description to the pump. If the thermal capacity of the system is unknown, it can be easily determined from the area of heated space and the specific heat consumption. 2.

pressure (m) – the height to which the pump is able to raise the coolant. Head reproduced pump to counteract hydrodynamic losses in pipes and their connections. In order to correctly calculate the pressure, it is necessary to determine the losses which depend on the coolant velocity and the pipe on which it runs. Specific losses are measured in pascals at meter and displays how much to increase the pressure on the pipeline segment length of one meter. After calculating losses in "straight pipe" should take into account the friction of the coolant at different sites and details (eg – fittings and etc.). Usually, the contribution of additional sites is one third of the losses in the pipes. Next multiply the specific losses to the length of the pipeline. To avoid mistakes in the calculations must take into account that the length of the pipeline is taken equal to the length of his most branches (if, of course, the pipeline branch). Roughly the same can take a maximum distance within the building, adding the length, width and height of the building, and the resulting value to double. In the end you must also take into account individual elements of the heating system of the type of boiler, faucet, valve or heat meter. The exact value of losses in each of these elements are given in the description of a particular pump model. Knowing the total losses, according to the schedule can be determine the desired value of pressure. But knowing the pressure and flow of any pump can easily determine whether it is for the heating system or not. Just when choosing a pump is necessary to consider the operating conditions circulating pump. A more precise properties and coolant temperature, pipe diameter, the nature of the water supply system and others.

Sewing Machines

Sunday, July 10th, 2016

For other vehicles the choice is not so rich, but the most popular paws on sale there. Sewing Advisor Many modern cars have computer-controlled system of assistance and tips when sewing – the so-called 'sewing advisor'. In simple machines on a special display shows the current settings of the machine – the selected line, its width and stitch length, thread tension, and the like. More complex may tell what settings are recommended for a particular type of fabric and how the foot and the needle should be used to perform some sewing operation. Many of the machines monitoring the correctness of the process of sewing, for example, do not allow choose the excessive width of the stitch when sewing twin needle, do not start to sew with a raised paw, or signal the imminent end of the thread on the bobbin.

The most complex machines may detail, with pictures and even short clips describe how to perform a sewing operation, such as invisible podgibku edge skirt. Threading This is a useful device is intended to facilitate threading the needle. This is especially true when often have to change the color of the thread, or if you do not see very well. In order to fill the thread a needle with such a device, simply skip the thread through the hook threader and drop (or press – to Depending on the design) of a small lever. thread through the eye of the needle and will only finally pull a loop.

Internet Systems

Wednesday, June 22nd, 2016

Manage 'smart home' at first seems very confusing, but understand it could even a child. It is not difficult to manage with using the convenient keypad where each button corresponds to any unit, group of devices or means a sequence of actions to be performed. In this case, the buttons can be illuminated display the current state of the relevant instrument. You can prevent voice control, which is becoming increasingly popular in recent years. It can be postponed for later A common misconception.

Many believe that first you need to make repairs, take care of the situation at home, and only then do all sorts of improvements. However, the development of automation systems rational to carry out the design phase, in parallel with development schemes of engineering systems. In addition, it will allow in the operation of apartment complexes put in place new systems with minimal rework, and violation of the decoration. 'Smart homes' infected viruses through the Internet, will rise up against their masters Brad? As it turns out, many not at all. If the virus affects computers and mobile phones, why they can not damage the 'smart home'? But even if we assume is, then it is hardly worth much worry. If there are viruses that can break your 'smart home', it will be created and a special anti-virus systems that provide reliable protection. The need for 'smart home' is defined area of the premises is another myth – the 'smart home' has the meaning set only in a large office, a country cottage or a spacious apartment.