What are the factors to be considered while choosing UPS batteries ( LIB , Lead Acid etc.. ) ?

 

What are the factors to be considered while choosing UPS batteries  ( LIB , Lead Acid etc.. ) ?

1. Footprint

2. Temperature Requirements

3. Charging time

4. Charging & Discharging Cycle

5. TCO

6. BMS

7. Battery Protection & Alerts

8. Environmental Impact

9. Design Life 

Pls do comment if anything is to be considered.

Thanks for reading. 

Er. Ashokraj S

Energy Performance Index Of The Building

What is EPI ? What is the national bench mark of the EPI ?...

EPI Stands for energy performance index of commercial building.
It is one of the key metric used for benchmarking the energy usage of the commercial building.

EPI is nothing but the ratio of energy consumption and build up areas in a year. The unit of the EPI is Kwh/m2 /year.

The ideal bench mark of the EPI between 100 to 150 KWh/m2/year.

The national bench mark of the EPI is 180Kwh/m2/Year.

The EPI of the commercial building will change based on the five climatic zone of the India  as specified in BEE.

Thanks for reading...

Er. Ashokraj S

IGBC AP Exam Model Question Paper -2

 IGBC AP Exam Model Question Paper -2

 

 

Question 1:

 

What is IGBC’s annual flagship event ?

 

1. Green Building Congress
2. Green Building forum
3. Green Building Conference

 

Question 2:

 

ECBC is Applicable for ?

 

1. 1000Sq.m and More
2. Connected load of 100KW
3. Both A & B

 

Question 3:

 

NBC Part 9 deals with ?

 

     A) Plumbing Service

     B) Building Material

     C) Building Service

 

Question 4:

 

MERV Related to ?

 

1. Ventilation
2. Light Pollution
3. Rain Water Harvesting

 

Question 5:

 

Hazardous waste management guidelines is provided by ?

 

A) ECBC

B) NBC

C) CPCB

 

Question 6:

 

Which standard is used for basic facilities for construction workers?

 

1. BOCW
2. ECBC
3. ASHRAE

 

Question 7:

 

NBC Parking Area Guidelines are based on ?

 

1. Building Area
2. Location
3. No of Occupants & function

 

Question 8:

 

Which of the following is not rapidly renewable material ?

 

1. Sunflowers
2. Bamboo
3. Sawdust

 

Question 9:

 

What is the pressure to be maintained in the smoking room ?

 

1. -5Pa
2. +5Pa
3. 10+Pa

 

Question 10:

 

Which of the following is the least detrimental to the ozone layer ?

 

A) CFC

B) HCFC

C) HFC

 

IGBC AP Exam Model Question Papaer -1

 IGBC AP Exam Model Question Paper – 1

 

 

Question 1:

 

If a project is achieving 65 credits and missing one mandatory requirement , can it still apply for certification?

 

1. Yes, after paying some fees
2. Yes, if applying for the first time
3. No

 

Question 2:

 

Which of below topic is covered in ASHRAE 90.1?

 

A) Water

B) Energy

C) Green Building

 

Question 3:

 

Statement A: Use of turf on the site should be minimized to conserve water.

Statement B: Treated wastewater can be reused for landscaping, flushing and cooling tower make-up water

1. A is True, B is False          
2.  A is False, B is True

      C)   Both are True                   

      

 

Question 4:

 

Which of the following is the objective of exterior light pollution reduction?

 

1. Reduce impact on nocturnal environment
2. Reduce lighting energy consumption
3. To turn off non-emergency lighting

 

Question 5:

 

Which of the following is the most efficient irrigation system?

1. Drip irrigation
2. Sprinkler
3. Crown flood

 

 

Question 6:

 

The strategy of using high solar reflective index to cover exposed roof area is used for what purpose?

 

1. Outdoor Light Pollution Reduction
2. To minimise heat island effect
3. Minimising negative impact on the ozone layer

 

Question 7:

 

How many CIRs are answered without levying any fee?

1. 2
2. 4
3. 1

 

 

Question 8:

 

The Precertification is valid for how long from the date of award?

 

1. 2 years
2. 5 Years
3. 3 Years

 

 

Question 9:

 

Which credit and how many points are awarded to a project with IGBC AP as a principal design team member?

 

1. Innovation, Three point
2. Innovation, Two point
3. Innovation, One point

 

 

Question 10:

 

How long does IGBC take to perform preliminary review?

 

1. 20 working days
2. 30 working days
3. 15 working days

UPS Design Configuration

There are many types of UPS design configuration available in today market. They are,

1. Capacity UPS Configuration 

2. Isolated redundant UPS Configuration 

3. Parallel redundant UPS configuration 

4. Distributed redundant UPS configuration 

5. System plus system UPS configuration 

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Ashokraj S

Calculation of Chiller Volume Flow Rate

Calculation of chiller volume rate : 

Since the water is standard fluid, mass flow rate of water and volume flow rate are both equal. 

Hence we can use the below formula to find out the mass/volume flow rate of water.

Q =m ×Cp ×Delta T 

Where

Q is chiller coil load in KW 

m is  Mass flow rate of water 

Cp  is Specific heat of water 

Delta T is difference between chiller entering water temperature and leaving water temperature.

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Battery Charging Current Calculation

How to calculate battery Charging Current ?

Battery Charging Current should be 10% of its battery AH rating .

Example 2: 

If you have 200AH SMF lead acid battery, then what will be the Charging Current ? 

10 % of Battery AH rating

10% of 200AH 

= 200×10/100

= 20 A.

The charging Current of 200AH battery should be 20A as per the thumb rule.

Example 1: 

If you have 100AH SMF lead acid battery, then what will be the Charging Current ? 

10 % of Battery AH rating

10% of 100AH 

= 100×10/100

= 10 A.

The charging Current of 100AH battery should be 10A as per the thumb rule.

Thanks for reading this. 

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Ashokraj S 

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