# 7

- B

- i APPENDIX 7

- B

. INTERNAL LOADS SCHEDULES AND PART

- LOAD

PERFORMANCE CURVES

TABLE OF CONTENTS

LIST OF TABLES

Table 7B.1. Occupancy, Lighting and Plug Loads Schedules

................................ ........ 7

- B

- 1

Table 7B.2. CAC and CHP Performance Curves Used in Small Office Modeling

........ 7

- B

- 2

# 7

- B

- 1 A PPENDIX 7

- B

. INTERNAL LOADS SCHEDULES AND PART

- LOAD PERFORMANCE CURVES

Table 7

- B

. 1

. Occupancy, Lighting and Plug Loads Schedules

Schedule Day of

Week 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

Lighting

(1.0 W/sf) Weekday 0.18 0.18 0.18 0.18 0.18 0.23 0.23 0.42 0.90 0.90 0.90 0.90 0.80 0.90 0.90 0.90 0.90 0.61 0.42 0.42 0.32 0.32 0.23 0.18

Sat 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18

Sun, Hol,

Other 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18 0.18

Plug

Equipment

(0.63

W/sf) Weekday 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.50 1.00 1.00 1.00 1.00 0.94 1.00 1.00 1.00 1.00 0.50 0.20 0.20 0.20 0.20 0.20 0.20

Sat 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20

Sun, Hol,

Other 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20

Occupancy Weekday 0.00 0.00 0.00 0.00 0.00 0.00 0.11 0.21 1.00 1.00 1.00 1.00 0.53 1.00 1.00 1.00 1.00 0.32 0.11 0.11 0.11 0.11 0.05 0.00

Sat 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

Sun, Hol,

Other 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

Heating

Setpoint Weekday 60.0 60.0 60.0 60.0 60.0 60.0 65.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 70.0 60.0 60.0 60.0 60.0 60.0

Sat 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0

Sun, Hol,

Other 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0 60.0

Cooling

Setpoint Weekday, 85.0 85.0 85.0 85.0 85.0 85.0 80.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 75.0 85.0 85.0 85.0 85.0 85.0

Sat 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0

Sun, Hol,

Other 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0 85.0

Fan

Operation

and

Ventilation Weekday, 0.0 0.0 0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 0.0 0.0 0.0 0.0 0.0

Sat 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Sun, Hol,

Other 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

Infiltration Weekday, 1.00 1.00 1.00 1.00 1.00 1.00 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25 1.00 1.00 1.00 1.00 1.00

Sat, 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00

Sun, Hol,

Other 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00

Hot Water Weekday, 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.27 0.55 0.64 0.64 0.82 1.00 0.91 0.55 0.55 0.73 0.37 0.37 0.18 0.27 0.09 0.00 0.00

Sat, 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

Sun, Hol,

Other 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

# 7

- B

- 2 Table 7

- B

. 2

. CAC and CHP Performance Curves Used in Small Office Modeling

Type Performance Curve

Equation Curve Coefficients

a b c d e f

CAC Total Cooling Capacity Function of Temperature Curve



# EDB WB f EDB e EDB d WB c WB b a FT CAP COOL

**× ×**  **+ ×**  **+ ×**  **+ ×**  **+ ×**  **+ =** 

**− −** 

2 2 

## 1.248093

- 0.034629 0.0015801 0.00322596

- 0.00008841

- 0.00025978

Total Cooling Capacity Function of Flow Fraction Curve

2 

# FF c FF b a FF CAP COOL **× +**  **× +**  **=**

**− −**  0.7662 0.24227

- 0.008473 NA NA NA

Energy Input Ratio Function of Temperature Curve



# EDB WB f EDB e EDB d WB c WB b a FT EIR COOL

**× ×**  **+ ×**  **+ ×**  **+ ×**  **+ ×**  **+ =** 

**− −** 

2 2 

## 0.436666 0.046707

- 0.0013704

- 0.014704 0.0007657

- 0.0003674

Energy Input Ratio Function of Flow Fraction Curve

2 

# FF c FF b a FF EIR COOL **× +**  **× +**  **=**

**− −**  1.5578

- 0.7241 0.16628 NA NA NA

Cooling Part Load Fraction Correlation Curve

2 

# PLR c PLR b a PLR EIR COOL **× +**  **× +**  **=**

**− −**  0. 81 0. 19 0.0 NA NA NA



# PTHP Heating Capacity Function of Temperature Curve

2 

# DB c DB b a FT CAP HEAT **× +**  **× +**  **=**

**− −**  0.824161 0.02277 0.0000103 NA NA NA

Heating Capacity Function of Flow Fraction Curve

2 

# DB c DB b a FF CAP HEAT **× +**  **× +**  **=**

**− −**  1.5578

- 0.7241 0.16628 NA NA NA

Heating Energy Input Ratio Function of Temperature Curve

3 2 

## DB c DB c DB b a FT EIR HEAT **× +**  **× +**  **× +**  **=**

**− −**  1.14084

- 0.0244301 0.0013092

- 0.000057 NA NA

Heating Energy Input Ratio Function of Flow Fraction Curve

2 

# FF c FF b a FF EIR HEAT **× +**  **× +**  **=**

**− −**  1.5578

- 0.7241 0.16628 NA NA NA

Heating Part Load Fraction Correlation Curve

2 

# PLR c PLR b a FPLR EIR HEAT **× +**  **× +**  **=**

**− −**  0.771 0.229 0.0 NA NA NA

# 7

- B

- 3 Where:



# FT CAP COOL

**− −**  = Total Cooling Capacity Function of Temperature

, 

# FF CAP COOL

**− −**  = Total Cooling Capacity Function of Flow Fraction Curve

, 

# FT EIR COOL

**− −**  = Energy Input Ratio Function of Temperature

, 

# FF EIR COOL

**− −**  = Energy Input Ratio Function of Flow Fraction

, 

# FPLR EIR COOL

**− −**  = Total Cooling Part Load Fraction Correlation Curve Name

, 

# FT CAP HEAT

**− −**  = Heating Capacity Function of Temperature Curve Name

, 

# FF CAP HEAT

**− −**  = Heating Capacity Function of Flow Fraction Curve Name

, FT EIR HEAT

**− −**  

# = Heating Energy Input Ratio Function of Temperature Curve Name

, FF EIR HEAT

**− −**  

# = H eating Energy Input Ratio Function of Flow Fraction Curve

Name

, FPLR EIR HEAT

**− −**  

# = Heating Part Load Fraction Correlation Curve Name

, WB = e ntering coil wet

- bulb temperature (° F)

, DB

= outside dry

- bulb temperature (° F)

, EDB = entering coil dry

- bulb temperature (° F) , and

PLR

= Part Load Ratio (cooling load/steady

- state capacity)

.

Normalized performance curves for the CAC and CHP condensing units were de veloped

based on manufacturers catalog data for York C ZB model ( CZB 036) for cooling performance

and York YZB ( YZB0 36) equipment for heating performance. 1

, 2 

# Equations are in formats

accepted for use in the EnergyPlus simulation tool input files (*. idf) fil es for each simulation

run. Part load fraction correlation curves were based on commercial performance data used in the

DOE Benchmark model for cooling part

- load performance degradation. Nomenclature used for

left hand side of each performance curve equati on based on DOE2.1E descriptors for these

parameters and is not normally found in the EnergyPlus documentation.

1

. York performance data for CAC. York CZB (13 SEER) Tech Guide 561909

- YTG

- A

0410.pdf

. Available at www.yorkupg.com/ PDF Files/ 561909

- YTG

- A

- 0410

. pdf

. (Last

accessed July 2010.)

2

. York performance data for CHP. YZB (13 SEER) Tech Guide 561921

- YTG

- A

- 0410.pdf.

Available at www.yorkupg.com/PDFFiles/ 561921

- YTG

- A

- 0410 .pdf (Last accessed July

2010.)