Hi Revival DQ? - "Food For Thought from HouseHold Communities!."

DQ?: HVAC Question!?!

Hi guys, i am installing 30000 and 48000 btu air conditioners, with an average pipe run of 20 meters, the outdoor units are on the roof of this building.

The pipes are 3/8 discharge and 3/4 suction pipe.

My question is can i make this whole run with the same pipe size,i was thinking of using a 7/8 pipe on the vertical run on the 30000 btu machine and 1 1/8 (inch and eighth)for 48000 btu machine on the suction pipe only ,discharge pipe will remain the same.

What will be the effect on this.

I want to use this bigger size as a suction accumulator on the vertical rise of about 10 meters.

The pipes from the machine (indoor , outdoor) will be 3/4 from the flare nut then two meters will change to bigger sizes.Its copper pipe.

Unshared knowledge is as good as nothing.

Hi!!! Tipped OFF !?/!SUCCESS!/!2013!/!FAILURE!/?!

"Hi Recommitting to Your HVAC Business Growth"

"Is it recommitment or change that needs to happen in 2013? It’s time to make decisions on leadership style, business operations, and employee enrichment."

Hi Leadership style:

Do employees have to adjust to your leadership style, or is your company culture truly integrated? If employees have to adapt to your style, consider making a change that allows you to be more in tune with your employees. Leadership is the most important factor in a winning organization and relating to employees is paramount.

Hi Efficient business operations:

Before making changes, make sure current processes are being fully executed (if they’re working for you). This prevents making change for change’s sake.

Hi Employee enrichment:

In order to have a flourishing business, the employees must be part of the direction that the business owner wants to go. Create a checklist of employees who need training and evaluate individuals for overall work performance and attitude (be sure to keep up the morale in the process).

Hi Mechanical Fan!

Hi Centrifugal Fan:

Typical centrifugal fan

Often called a "squirrel cage" (because of its similarity in appearance to exercise wheels for pet rodents) or "scroll fan", the centrifugal fan has a moving component (called an impeller) that consists of a central shaft about which a set of blades, or ribs, are positioned. 

Centrifugal fans blow air at right angles to the intake of the fan, and spin the air outwards to the outlet (by deflection and centrifugal force). 

The impeller rotates, causing air to enter the fan near the shaft and move perpendicularly from the shaft to the opening in the scroll-shaped fan casing. 

A centrifugal fan produces more pressure for a given air volume, and is used where this is desirable such as in leaf blowers, blowdryers, air mattress inflators,inflatable structures, climate control, and various industrial purposes. 

They are typically quieter than comparable axial fans.

Hi Bearings An Understanding!

Hi Bearings An Understanding!

Bearings can trace their origins back to the royal halls of ancient Egypt. The logs that were used to roll immense stone blocks for the pyramids were some of the earliest bearings. Bearings work against both friction and gravity, for the purpose of increasing machinery speed and efficiency.

When designing or spec-ing in a bearing, the engineer must be at his best. If you’re creating, say, a U-handle, you can err a bit in size and configuration and still have the part perform its function. Not so with bearings: they require precision, or they will do more harm than good to a machine.

You’ll find these durable, high precision components in applications such as computers, VCRs, cars, trains, planes, construction equipment, machine tools, refrigerators and fans.. .wherever there is a requirement for high speed rotation, minimal vibration and noise reduction.

Plain bearings were developed for the automobile industry in the 1920s. Since then, all manner of these useful components have been developed.

Various combinations of bearing types can be combined in one housing to manage bearing loads from several directions at once.

Proper and stable mounting of the bearing are also essential to good performance. Looseness will result in vibration and noise, shock loads relative to speed, and eventually the actual destruction of the bearing and adjacent parts. Meanwhile, seeing as friction always creates heat, wear and tear, lubrication is an essential part of a bearing. Otherwise, once again bearing destruction is the result.

You’ll need to use your engineering expertise when calculating the appropriate bearing for your application, taking into account things like static and dynamic load ratings and limiting speed.