basic load calculation sheet

8/12/2019 Basic Load Calculation Sheet

1/15


2/15

B10Cell:

Solar gain-glass canComment:

calculate by two method . First is for "With the Storage Factor",use the description of case 1. Second is for "without the Storage Factor",use the description of case 2.

C11Cell:

Windows area , sq ftComment:

Area of glassed structure that solar haet gain get thru at varies exposure. ( N,E,S,W,NE,SE

,SW,NW) , Chapter 3

E11Cell:

Comment:

Solar heat gain thru glass,Btu/(hr)-(sq ft)

Case 1; With Storage factor

Multiplying of "Peak solar heat gain thru ordinary glass" (at the selected month , location ,exposure) and " Storage load factors of solar heat gain".

( Table 6, Page 29 for Peak solar heat gain thru ordinary glass and Table 7,8,9,10 or 11 ,Page 30-34 for Storage load factors of solar heat gain thruglass) :

Example : The peak solar heat gain for a west exposure

in July at 40 north Latitude = 164 Btu/hr-sqft (Tbl.6) and the

Storage load factor with internal shade = 0.66 for a west exposure at 4 pm ,the weight ~ 100 lb/sq ft. So, the

Solar heat gain thru glass for a west = 164x0.66 =

108.24 Btu/hr

Case 2 ;Without Storage factor

Solar heat gain thru ordinary glass" (at the selected month , location ,exposure) , ( Table15, Page 44-49 )

G11Cell:

Comment:

Over all Factor for solar heat gain

Case 1: With storage factor

Factor for adjustment of the value of solar heat gain as the effect of Shading Device or Glass block . And the correction factor(Table 16,Page 52, Over all Factors for solar heat gain thru glass , Table 17, Page 54, Solar heat gain for glass block)

Example : Factor of solar heat gain thru glassfor the Regular plate Glass = 0.94

Case 2 : Without storage factor

Correction factor on the bottom of Table 15, Page 44-49

J11Cell:

Out door & Room conditionComment:

- Outdoor condition see Table 1-3 Page10-19

- Room Condition see Table 4-5, Page 20-23

C12Cell:


SDM#1-01 , File : 239173605.xls.ms_office Date : 7/22/2014 ,Time :7:09 AM


3/15


,SW,NW) , Chapter 3

E12Cell:

Comment:



Multiply ing of "Peak solar heat gain thru ordinary glass" (at the selected month , location ,exposure) and " Storage load factors of solar heat gain".






108.24 Btu/hr


Solar heat gain thru ordinary glass " (at the selected month , location ,exposure) , ( Table15, Page 44-49 )

G12Cell:

Comment:



Factor for adjustment of the value of solar heat gain as the effect of Shading Device or Glass block . And the correction factor(Tab le 16,Page 52, Over all Factors for solar heat gain thru glass , Table 17, Page 54, Solar heat gain for glass block)




C13Cell:



,SW,NW) , Chapter 3

E13Cell:

Comment:









4/15



108.24 Btu/hr



G13Cell:

Comment:







C14Cell:



,SW,NW) , Chapter 3

E14Cell:

Comment:









108.24 Btu/hr



G14Cell:

Comment:






5/15




C15Cell:


Area of glassed structure that solar haet gain get thru the vertical exposure.; Chapter 3

E15Cell:

Comment:



Multiplying of "Peak solar heat gain thru ordinary glass" (at the selected month , location ,exposure) and " Storage load factors of solar heat gain".






108.24 Btu/hr



G15Cell:

Comment:







K16Cell:

People, PersonComment:

Amount of people in the A/C area.

M16Cell:

Ventilation rate, CFM/PersonComment:

Ventilation rate base on the quantity of person in

conditioning space. (Table45, Page97)



6/15

C17Cell:

Wall area , sq ftComment:

Area of wall or roof that conducted heat gain get thru at each exposure. ( ,E,S,W,NE,

SE,SW,NW)

E17Cell:

Equivalent temperature diff. ,Deg FComment:

Operation of Equivalent temperature difference value (wall , roof ,Table 19, ,Page 62 ) and

Correction number (Table20A , Page 63,64)

G17Cell:

Transmission Coefficient, U, (Btu/(hr)(sq ft)(deg F)Comment:

Value of Transmission Coefficient , U Value of each type of wall material (Table 21,22,23,24,25,26 ,Page 66-70 )

M17Cell:

Ventilation rate, CFM/Sq.ftComment:

Ventilation rate base on the size ot the

conditioning space. (Table45, Page97)

C18Cell:



SE,SW,NW)

E18Cell:




G18Cell:



C19Cell:



SE,SW,NW)

E19Cell:



7/15




G19Cell:



C20Cell:



SE,SW,NW)

E20Cell:




G20Cell:



L20Cell:



M20Cell:

Infiltration rateComment:

Infilt ration rate base on number of people , See Table41, Page 90

C21Cell:



SE,SW,NW)

E21Cell:






8/15

G21Cell:


Value of Transmission Coefficient , U Value of each type of Roof material (Table 27,28,Page 71,72 )

L21Cell:

Door,Comment:

The numbe of open door of the A/C area.

M21Cell:

Infiltration rateComment:

Infiltration rate base on number of opening doors , See Table41, Page 90

C22Cell:



SE,SW,NW)

E22Cell:




G22Cell:


Value of Transmission Coefficient , U Value of each type of Roof material (Table 27,28,Page 71,72 )

O22Cell:

Exhaust capacity ,CFMComment:

Exhaust capacity of the system

C24Cell:

Glassed area , sq ftComment:

Heat transmission area thu glass except wall & roof.

E24Cell:

Dry bulb temp. diff , FComment:

Dry bulb temperature difference between outdoor temperature and air conditioning room temperature. (See the data at the top of calculation sheet)

G24Cell:

U Value of glass ,Btu/hr-sq.ft-FComment:



9/15

Transmission Coefficient value of Windows,

skylights, doors& Glass block (Table 33, Page 76)

C25Cell:

Partition area , sq ftComment:

Heat transmission area thu partition except wall & roof.

E25Cell:


Dry bulb temperature difference betaween another side of partition and air conditioning room temperature.

G25Cell:

U Value of Partition ,Btu/hr-sq.ft-FComment:

Transmission Coefficient value of Partitions(Table 25,26, Page 69,70)

C26Cell:

Ceiling area , sq ftComment:

Heat transmission area thu ceilingexcept wall & roof.

E26Cell:


Dry bulb temperature difference betaween above ceiling and air conditioning room temperature.

G26Cell:


Transmission Coefficient value of Ceiling or floor(Table 29,30 Page 73,74)

C27Cell:

Floor area , sq ftComment:

Heat transmission area thu floorexcept wall & roof.

E27Cell:


Dry bulb temperature difference betaween under floor temperature and air conditioning room temperature.

G27Cell:


Transmission Coefficient value of Ceiling or floor(Table 29,30 Page 73,74)

C28Cell:

Infiltration , cfmComment:

Ignore this value in case of ventilation excess Infiltration of air thu window,door,crack or swinging door, (See note 4)



10/15

E28Cell:



L30Cell:

Apparatus dewpointComment:

Define from Table 65,Page or Psychrometric chart Fig 33 ,Page116

C31Cell:



G31Cell:

Heat gain from people, Btu/hrComment:

Sensible heat release from body when they are

doing the activity (Table 48 ,Page 100)

C32Cell:

Power, kwComment:

Grossory of power of operating motor in the A/C area. It can generate heat to be the cooling load.

G32Cell:

Heat gain from electric motor, Btu/hrComment:

Sensible heat release from motor into the A/C

area (Table 53 ,Page 105)

C33Cell:

Power, kwComment:

Grossory of power of lighting in the A/C area. It can generate heat to be the cooling load.

G33Cell:

Heat gain from light, Btu/hrComment:

Sensible heat release from lights into the A/C

area (Table 49 ,Page 101)

D34Cell:

Heat gain from appliance, Btu/hrComment:

Grossory of power of appliance in the A/C area. It can generate sensible heat to be the cooling load.(Table 50,51,52 Page101,103)



11/15

G34Cell:

Correction Factor of ApplianceComment:

Factoc of Appliance for the adjustment of each situation of cooling load.(Bottom of Table 50,51,52)

D35Cell:

Additional heat gain, Btu/hrComment:

Heat gain from pipe or tank located in A/C area.(Table 54-57 Page107-109)

G35Cell:

Correction Factor of Additional heat gainComment:

Factoc of additional heat gain for the adjustment of each situation of cooling load.(Bottom of Table 54-57)

C37Cell:

Floor area of A/C space, sq.ftComment:

Floor area of air conditioning space where is influenced by the temperature swing effect. The temperature swing effect will reduce the sensible heat gain. Because of some heat gain is stored in the building .It doesn't release all of it at the peak

rate.

E37Cell:

Desired temperature swing, FComment:

Recommended inside design condition. The temperature swing value depend on each type of building function. (Table 4 ,Page 20)

G37Cell:

Storage FactorComment:

Factor of storage heat gain depend on the load pattern, weight of material surrounding the space and hour of operation.(Table 13,Page 37)

C40Cell:

Safety FactorComment:

Factor for the uncertainly of survey. The value in the range of 0%-5%.To be added to the room sensible heat. ( Chapter 7,Page112)

C43Cell:

Heat gain to supply duct.%Comment:

Heat gain to supply duct in case of the cooled air duct go through the unconditioned space. Depend on amount of room sensible heat , type of duct insulation , distance and temperature difference between cooled air in duct and the unconditioned space temperature.(Chart 3,Page 110)

E43Cell:

Supply air duct leak loss,%Comment:

Average supply duct leakage from the entire length of low velocity supply duct whether large and small system is around 10% of supply air quantity. Individual workmanship is the greatest variable and duct leakages from 5%-30%.(Chapter 7,Page 110)



12/15

G43Cell:

Heat gain from A/C Fan,Draw thru system,%Comment:

The generated heat gain from fan motor which distribute cooled air in the A/C system. It will effect to have more sensible heat gain. And depend on the temperature difference of room to supply air ,Fan total pressure and feature of fan installation.(Table 59,Page 111)

C44Cell:

Outdoor air,CFMComment:

Quantity of outdoor air make up to the A/C system. See note 3 on the bottom of this calculation sheet (Table45,Page97 and Table 43, Page92)

E44Cell:


Dry bulb temperature difference betaween outdoor temperature and air conditioning room temperature. (See the data at the top of calculation sheet)

G44Cell:

Bypass FactorComment:

Bypass factor is a function of the physical and operating charecteristics of the conditioning apparatus (Cooling Coil) See typical Bypass Factors (Table 61,Page127)

C47Cell:

Infiltration , cfmComment:

Ignore this value in case of ventilation excess Infiltration of air thu window,door,crack or swinging door, (See note 4)

E47Cell:

Moisture content, Gr/LbComment:

Moisture content difference between outdoor and room condition., (See note 2)

C48Cell:



E48Cell:

Heat gain from people, Btu/hrComment:

Latent heat release from body when they are

doing the activity (Table 48 ,Page 100)

C49Cell:

Steam , Lb/HrComment:

Amount of steam escape to conditioned space



13/15

D50Cell:

Heat gain from appliance, Btu/hrComment:

Grossory of power of appliance in the A/C area. It can generate latent heat to be the cooling load.(Table 50,51,52 Page101,103)

G50Cell:

Correction Factor of ApplianceComment:

Factoc of Appliance for the adjustment of each situation of cooling load.(Bottom of Table 50,51,52)

D51Cell:

Additional heat gain, Btu/hr-sq.ftComment:

Heat gain from evaporation of free water surface in A/C space.(Table 58 Page109)

C52Cell:

Moisture material area ,sq.ftComment:

Face area of moisture material which can evaporate into A/C space.

E52Cell:



G52Cell:

Permeance, Btu/(hr)(100sq.ft)(Gr/Lb diff)Comment:

Diffusion of moisture material into the A/C space.(Table 40 Page84-85)

C54Cell:

Safety FactorComment:

Factor for the uncertainly of survey. The value in the range of 0%-5%.To be added to the room latent heat. ( Chapter 7,Page112)

E56Cell:

Supply air duct leak loss,%Comment:


C57Cell:

Outdoor air ,CFMComment:

Amount of outdoor air make up to the A/C system

can be the latent heat gain by the mixed moisture.



14/15

See note 3

E57Cell:



G57Cell:



C61Cell:



can be the sensible heat gain by the temperature difference. See note 3

E61Cell:



G61Cell:



C62Cell:



can be the latent heat gain by the mixed moisture.

See note 3

E62Cell:



G62Cell:



C63Cell:

Heat gain to return duct.%Comment:



15/15

Heat gain to return duct in case of the cooled air duct go through the unconditioned space. Depend on amount of room sensible heat , type of duct insulation , distance and temperature difference between cooled air in duct and the unconditioned space temperature.(Chart 3,Page 110)

G63Cell:

Return air duct leak gain,%Comment:


C65Cell:

Heat gain from dehumidifier pump,%Comment:

With dehumidifier systems, the horsepower required to pump the water adds heat to the system.This heat will be an addition to the grand total heat.(Table60 ,Page 113)

G65Cell:

Heat gain from dehumidifier pipe,%Comment:

- Very little external piping ~1%

- Average external piping ~2%

- extensive external piping ~4%

Chapter 7,Page 113


basic load calculation sheet

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