5.9
Miscellaneous Energy Uses
Miscellaneous energy uses are
defined as those that may be treated separately since they have little or no
interaction with the conditioned thermal zones or the HVAC systems that serve
them.
5.9.1.1 System Loads
and Configuration
|
Water Heating System
Name |
|
Applicability |
All water heating systems |
|
Definition |
A unique descriptor for each water heating system.
A system consists of one or more water heaters, a
distribution system, an estimate of hot water use, and a schedule for that
use. Nonresidential buildings will typically have multiple systems,
perhaps a separate electric water heater for each office break room, etc.
Other building types such as hotels and hospitals may have a
single system serving the entire
building. |
|
Units |
Text, unique |
|
Input Restrictions |
Where applicable, this
should match the tags that are used on the plans such that a plan reviewer
can make a connection. |
|
Standard Design |
The naming convention for the standard design system
shall be similar to the proposed design. |
|
Standard Design:
Existing Buildings |
|
|
Water Heating Peak
Use |
|
Applicability |
All water heating systems, required |
|
Definition |
An indication of the peak hot water usage (e.g., service to
sinks, showers, kitchen appliances, etc.). When specified per occupant,
this value is multiplied by design occupancy density values and modified by
service water heating schedules to obtain hourly load
values which are used in the simulation.
Peak consumption is commonly specified as gallons per
hour (gph) per occupant, dwelling unit, hotel room, patient room, or floor area.
If consumption is specified in gph, then additional inputs would be needed
such as supply temperature, cold water inlet temperature, etc.
Software that specifies peak use as a thermal load in
Btu/h can apply
ACM rules for the mains (cold water inlet) temperature and supply
temperature to convert the prescribed peak use from gph/person to
Btu/h-person. The thermal load does not include conversion efficiencies of
water heating equipment. |
|
Units |
gph/person |
|
Input Restrictions |
For nonresidential spaces,
prescribed values from Appendix 5.4A if a service hot water heating system
is installed; otherwise, all values are 0.
For high-rise residential
spaces and residential living spaces of hotels and motels (guestrooms),
the rules in the Residential ACM Reference Manual are
followed. |
|
Standard Design |
Prescribed values from Appendix 5.4A if a service hot
water heating system is installed; otherwise, all values are 0.
For high-rise residential spaces and residential living
spaces of hotels and motels (guestrooms), the rules in the Residential
ACM Reference Manual are followed. |
|
Standard Design:
Existing Buildings |
|
|
Water Heating
Schedule |
|
Applicability |
All water heating systems |
|
Definition |
A fractional schedule reflecting the time pattern of
water heating use.
This input modifies the water heating peak use
described above. |
|
Units |
Data structure - schedule,
fractional |
|
Input Restrictions |
The schedules from Appendix
5.4A shall be used. For high-rise residential spaces and residential
living spaces of hotels and motels (guestrooms), the rules in the
Residential ACM Reference Manual are followed. |
|
Standard Design |
The schedules from Appendix 5.4A shall be used. For
high-rise residential spaces and residential living spaces of hotels and
motels (guestrooms), the rules in the Residential ACM Reference
Manual are followed. |
|
Standard Design:
Existing Buildings |
|
|
Water Heating System
Configuration |
|
Applicability |
All water heating systems |
|
Definition |
The configuration and layout of the water heating
system including the number of water heaters; the size, location, length
and insulation of distribution pipes; recirculation systems
and pumps; and any other details about the system that would affect the
energy model. |
|
Units |
Data structure |
|
Input Restrictions |
None |
|
Standard Design |
For healthcare facility spaces, the same as Proposed.
For high-rise residential buildings, the rules in the Residential ACM
Reference Manual shall be followed.
For all other spaces, the standard design shall have
one gas storage water heater if any of the spaces have a Space Water
Heating Fuel Type of Gas (from Appendix 5.4A), and the standard design
building will have on electric water heater if the any of the spaces
have a Space Water Heating Fuel Type of Electric. |
|
Standard Design:
Existing Buildings |
|
|
Water Mains Temperature
Schedule |
|
Applicability |
All water heating systems |
|
Definition |
A monthly temperature schedule indicating the water
mains temperature.
This temperature and the setpoint temperature are used
to convert the load into a water flow rate. |
|
Units |
Data structure - schedule,
°F |
|
Input Restrictions |
For nonresidential spaces,
the schedules from Appendix 5.4A shall be used. The water mains
temperature schedule shall be fixed for a given climate zone.
For high-rise residential
spaces and residential living spaces of hotels and motels (guestrooms),
the rules in the Residential ACM Reference Manual are
followed. |
|
Standard Design |
For nonresidential spaces, the schedules from Appendix
5.4A shall be used. The water mains temperature schedule shall be fixed
for a given climate zone.
For high-rise residential spaces and residential living
spaces of hotels and motels (guestrooms), the rules in the Residential
ACM Reference Manual are followed. |
|
Standard Design:
Existing Buildings |
|
5.9.1.2 Water
Heaters
This section describes the building descriptors
for water heaters. Typically, a building will have multiple water heating
systems and each system can have multiple water heaters, so these building
descriptors may need to be specified more than once.
|
Water Heater
Name |
|
Applicability |
All water heaters |
|
Definition |
A unique descriptor for each water heater in the
system.
Some systems will have multiple pieces of equipment.
For instance, a series of water heaters plumbed in parallel or a boiler
with a separate storage tank. |
|
Units |
Text, unique |
|
Input Restrictions |
Where applicable, this
should match the tags that are used on the plans such that a plan reviewer
can make a connection. |
|
Standard Design |
The naming convention for the standard design system
shall be similar to the proposed design. |
|
Standard Design:
Existing Buildings |
|
|
Water Heater Type and
Size |
|
Applicability |
All water heaters |
|
Definition |
This building descriptor includes information needed to
determine the criteria from baseline standards. The choices and the
associated rated capacity (heat input rate) are listed in the 2015 Appliance Efficiency Regulations, except that
oil-fired water heaters and boilers are not supported. |
|
Units |
List conventional, heat pump
split, or heat pump packaged |
|
Input Restrictions |
As designed |
|
Standard Design |
For healthcare facility spaces, the same as Proposed.
For all other spaces, the standard design shall have one gas storage water
heater if any of the spaces have a space water heating fuel type of gas
(from Appendix 5.4A), and the standard design
building will have on electric water heater if the any of the spaces
have a space water heating fuel type of electric
For high-rise residential spaces and residential living
spaces of hotels and motels (guestrooms), the rules in the Residential
ACM Reference Manual are followed. |
|
Standard Design:
Existing Buildings |
Same as proposed if water
heater is existing |
|
Rated
Capacity |
|
Applicability |
All water heaters |
|
Definition |
For gas and electric resistance water heaters, the
heating capacity of a water heater (input rate) at the rated conditions
specified in DOE 10 CFR Part 430 or ANSI Z21.10. For heat pump
water heaters, the rated heating capacity supplied to the water (output
rate). |
|
Units |
Thousands of British thermal
units per hour (MBH) |
|
Input Restrictions |
As designed |
|
Standard Design |
The capacity of the standard design water heaters will
be based on the larger of the total design hot water consumption rate
(gallons/hr) of all the spaces in the building or 75 gallons per
hour. The consumption rate is converted to Btu/hr (x (design supply
temp – 55) x 8.2877 pounds/gallon x 1 Btu/pound-F). That value is
multiplied by 0.60 to find the heat that must be supplied to the
water.
All of the water heaters in the proposed design are
similarly converted to a total Btu/hr heat output, summed across the water
heaters, and multiplied by 0.60.
The standard design uses the smaller of these values
and divides by thermal efficiency to find energy input.
If the standard design has both a gas water heater and
an electric water heater, the total capacity will be pro-rated between the
two based on the total hot water consumption rate of the spaces with water
heating fuel type of electric or gas.
|
|
Standard Design:
Existing Buildings |
|
|
Storage
Volume |
|
Applicability |
Storage water heaters |
|
Definition |
The volume of a storage water heater used in the
standby loss calculations and standard design calculations of energy
factor and uniform energy factor. |
|
Units |
Gallons |
|
Input Restrictions |
As designed |
|
Standard Design |
The volume of the standard design water heaters will be
based on the larger of the total design hot water consumption rate
(gallons/hr) of all the spaces in the building or 75 gallons per
hour. That value is multiplied by 1 hour and 0.40 to determine the
storage volume.
All of the water heaters in the proposed design are
similarly converted to a total Btu/hr heat output, summed across the water
heaters. This value is multiplied by 0.40, and converted to gallons
(design supply temp – 55) / 8.2877 pounds/gallon / 1 Btu/pound-F x 1
hr).
The standard design uses the smaller of these
values.
If the standard design has both a gas water heater and
an electric water heater, the total volume will be pro-rated between the
two based on the total hot water consumption rate of the spaces with water
heating fuel type of electric or gas.
For high-rise residential spaces and residential living
spaces of hotels and motels (guestrooms), the rules in the Residential
ACM Reference Manual are followed. |
|
Standard Design:
Existing Buildings |
|
|
Input Power |
|
Applicability |
Heat pump water heaters |
|
Definition |
The total design electrical input to a heat pump water
heater at design conditions.
This power includes the input to the compressor,
controls, evaporator fan, and pump (if present). |
|
Units |
Kilowatts (kW) |
|
Input Restrictions |
As designed |
|
Standard Design |
Not applicable |
|
Standard Design:
Existing Buildings |
|
|
Storage Tank
Location |
|
Applicability |
Heat pump water heaters |
|
Definition |
The location of a heat pump water heater. |
|
Units |
List:
•
Conditioned
•
Unconditioned
|
|
Input Restrictions |
List see above |
|
Standard Design |
|
|
Standard Design:
Existing Buildings |
|
|
Energy
Factor |
|
Applicability |
Equipment covered by the National Appliance Energy
Conservation Act (NAECA), which includes small storage and instantaneous
water heaters |
|
Definition |
The energy factor (EF) is the ratio of the energy delivered
by the water heater divided by the energy used, in the same units. EF is
calculated according to the DOE 10 CFR Part 430 test procedure, which
specifies a 24-hour pattern of draws, a storage temperature, inlet water
temperature, and other test conditions. These conditions result in the
energy delivered for the test period. Energy inputs are measured for the
same test period and the EF ratio is calculated. |
|
Units |
Unitless ratio |
|
Input Restrictions |
Building descriptors for
the proposed design should be consistent with equipment specified on the
construction documents or observed in the candidate building.
For water heaters
manufactured after June 1, 2017 that contain a Uniform Energy Factor, the
EF shall not be input by the user, but shall be calculated by:
Where:
|
F |
Energy
Factor |
|
N |
Recovery
Efficiency
|
|
P |
Power Input
(W) |
|
U |
UEF |
|
N |
Recovery efficiency
defined as 0.80 for storage water heater UEF to EF
conversion |
|
Draw Pattern |
a |
b |
c |
d |
|
Very Small |
0.250266 |
57.5 |
0.039864 |
67.5 |
|
Low |
0.065860 |
57.5 |
0.039864 |
67.5 |
|
Medium |
0.045503 |
57.5 |
0.039864 |
67.5 |
|
High |
0.029794 |
57.5 |
0.039864 |
67.5 |
|
|
Standard Design |
For nonresidential buildings and nonresidential spaces,
the energy factor for the standard design system shall be determined from
the Appliance Efficiency Regulations.
For high-rise residential spaces and residential living
spaces of hotels and motels (guestrooms), the rules in the Residential
ACM Reference Manual are followed. |
|
Standard Design:
Existing Buildings |
|
|
Uniform Energy
Factor |
|
Applicability |
Equipment covered by NAECA that is rated after June 1,
2017 with a Uniform Energy Factor (UEF) that includes small storage and
instantaneous water heaters |
|
Definition |
The UEF defines an efficiency level for a specific
targeted use pattern |
|
Units |
Unitless ratio |
|
Input Restrictions |
Must meet mandatory minimum
requirements defined by federal or state appliance efficiency
standards |
|
Standard Design |
Not applicable |
|
Standard Design:
Existing Buildings |
|
|
First Hour
Rating |
|
Applicability |
Water heating storage tanks with a UEF rating |
|
Definition |
The first hour rating is a measure of the overall
capacity of the water heater that incorporates both the heat input rate
and the tank storage capacity and is used to determine the draw
pattern. |
|
Units |
gal/hr |
|
Input Restrictions |
As designed |
|
Standard Design |
Not applicable |
|
Standard Design:
Existing Buildings |
|
|
Draw
Pattern |
|
Applicability |
Storage water heating tanks with a UEF rating |
|
Definition |
The draw pattern is determined as: very small, low,
medium, or high from the user entry of first hour rating (FHR).
Very small: 0-18 gal/hr
Low: 18-51 gal/hr
Medium: 51-75 gal/hr
High: > 75 gal/hr |
|
Units |
List:
•
Very small
•
Low
•
Medium
•
High |
|
Input Restrictions |
Not user editable. Draw
pattern is determined from FHR user input. |
|
Standard Design |
Not applicable |
|
Standard Design:
Existing Buildings |
|
|
Thermal
Efficiency |
|
Applicability |
Oil and gas-fired water heaters not covered by
NAECA |
|
Definition |
The full load efficiency of a water heater at rated
conditions expressed as a dimensionless ratio of output over input. It is
also referred to as recovery efficiency. |
|
Units |
Unitless ratio |
|
Input Restrictions |
Building descriptors for
the proposed design should be consistent with equipment specified on the
construction documents or observed in the candidate building. |
|
Standard Design |
For nonresidential buildings and nonresidential spaces,
the thermal efficiency is determined from Table F-2 in the Appliance
Efficiency Regulations.
For high-rise residential spaces and residential living
spaces of hotels and motels (guestrooms), the rules in the Residential
ACM Reference Manual are followed. |
|
Standard Design:
Existing Buildings |
|
Baseline efficiency is set from the Appliance Efficiency
Regulations
|
Tank Standby
Loss |
|
Applicability |
Water heaters not covered by NAECA |
|
Definition |
The tank standby loss for storage tanks, which includes
the effect of recovery efficiency |
|
Units |
Btu/h for the entire tank |
|
Input Restrictions |
Standby loss is calculated
as:
Where:
|
S |
The standby loss
fraction listed in the Energy Commission’s Appliance Database of Certified Water Heaters |
|
VO |
The actual storage
capacity of the water heater as listed in the Energy Commission’s
Appliance Database of Certified Water Heaters
(gallons) |
|
|
Standard Design |
Table F-2 of the Appliance Efficiency
Standards |
|
Standard Design:
Existing Buildings |
|
|
Tank Off-Cycle Loss
Coefficient |
|
Applicability |
Water heaters |
|
Definition |
The tank standby loss coefficient (UA) for the water
heater.
For small water heaters covered by NAECA, the loss
coefficient is a derived parameter, a function of the EF and recovery
efficiency. |
|
Units |
Btu/h - °F |
|
Input Restrictions |
For NAECA covered water
heaters, the loss coefficient is calculated by:
Where:
|
EF |
The energy factor of
the rated water heater (unitless) |
|
RE |
The recovery
efficiency of the rated water heater. If this data is not available
the default shall be 0.78 for gas water heaters and 0.93 for
electric water heaters. |
|
Pon |
The input power to
the water heater, in Btu/h |
|
|
Standard Design |
For
nonresidential spaces, 10 Btu/h-F. For high-rise residential spaces and
residential living spaces of hotels and motels (guestrooms), the rules in
the Residential ACM Reference Manual are followed |
|
Standard Design:
Existing Buildings |
|
The baseline loss coefficient for
NAECA water heaters shall be:
10 Btu/h-F for gas-fired water
heaters
|
Off Cycle Parasitic
Losses |
|
Applicability |
Water heaters |
|
Definition |
The rate of parasitic losses, such as a pilot light or
controls, when the water heater is not heating |
|
Units |
Watts |
|
Input Restrictions |
As designed |
|
Standard Design |
0 |
|
Standard Design:
Existing Buildings |
|
|
Off Cycle Fuel
Type |
|
Applicability |
Water heaters |
|
Definition |
The type of fuel that serves energy using parasitic
equipment, such as a pilot light or controls, when the water heater is not
heating |
|
Units |
List electricity, gas, oil,
or propane |
|
Input Restrictions |
As designed |
|
Standard Design |
Not applicable |
|
Standard Design:
Existing Buildings |
|
Not applicable
|
On-Cycle Parasitic
Losses |
|
Applicability |
Water heaters |
|
Definition |
The rate of parasitic losses, such as a pilot light or
controls, when the water heater is not heating. It may be different than
off-cycle losses if the flue energy is considered. |
|
Units |
Watts |
|
Input Restrictions |
As designed |
|
Standard Design |
Not applicable |
|
Standard Design:
Existing Buildings |
|
0
|
On-Cycle Fuel
Type |
|
Applicability |
Water heaters |
|
Definition |
The type of fuel that serves energy using parasitic
equipment, such as a pilot light or controls, when the water heater is not
heating |
|
Units |
List electricity, gas, oil,
or propane |
|
Input Restrictions |
As designed |
|
Standard Design |
Not applicable |
|
Standard Design:
Existing Buildings |
|
|
Water Heater Ambient
Location |
|
Applicability |
Water heaters |
|
Definition |
The location of the water heater for determining losses
and energy interaction with the surroundings |
|
Units |
List schedule, zone,
outdoors |
|
Input Restrictions |
As designed |
|
Standard Design |
Not applicable |
|
Standard Design:
Existing Buildings |
|
|
Water Heater Compressor
Location |
|
Applicability |
Heat pump water heaters |
|
Definition |
The location of the heat pump compressor for
determining losses and energy interaction with the surroundings.
The air temperature at the compressor location also
controls the compressor’s crankcase heater operation. |
|
Units |
List zone,
outdoors |
|
Input Restrictions |
As designed |
|
Standard Design |
Not applicable |
|
Standard Design:
Existing Buildings |
|
Zone
|
Tank Standby Loss
Fraction |
|
Applicability |
Storage tank water heaters |
|
Definition |
The tank standby loss fraction for storage
tanks |
|
Units |
Unitless |
|
Input Restrictions |
Prescribed to the value
listed in the Appliance Database of Certified Water Heaters |
|
Standard Design |
Not applicable
The part-load curve procedure in Title 24 can be an alternate
method of specifying the effects of standby and parasitic losses on
performance. The primary method is to specify a loss coefficient for the
storage tank. |
|
Standard Design:
Existing Buildings |
|
|
Fuel Water Heater
Part-Load Efficiency Curve |
|
Applicability |
Water heating equipment for
which a loss coefficient is not specified (alternate method) |
|
Definition |
A set of factors that adjust the full-load thermal
efficiency for part load conditions; set as a curve |
|
Units |
Percent (%) |
|
Input Restrictions |
The following prescribed
curve shall be used based on user inputs. The curve shall take the form of
a quadratic equation as follows:
For Title 24, the
coefficients shall be determined by:
Recovery efficiency
substituted with thermal efficiency when applicable.
For boilers, instantaneous
gas or other storage type water heaters, not in the scope of covered
consumer products as defined in the Title 10 or the Code of Federal
Regulations, Part 430:
Required inputs and
standard and proposed design assumptions depend on the type of water
heater and whether or not it is a DOE covered consumer product.
Where:
|
FHeatPLC |
The fuel heating part
load efficiency curve |
|
Fuelpartload |
The fuel consumption
at part-load conditions (Btu/h) |
|
Fueldesign |
The fuel consumption
at design conditions (Btu/h) |
|
Qpartload |
The water heater
capacity at part-load conditions (Btu/h) |
|
Qrated |
The water heater
capacity at design conditions (Btu/h) |
|
PLRn |
Part-load ratio for
the nth hour and shall always be less than 1 |
|
INPUT |
The input capacity of
the water heater expressed in Btu/hr |
|
STBY |
Hourly standby loss
expressed in Btu/hr. For large storage gas water heaters, STBY is
listed in the Energy Commission’s appliance database. The value
includes pilot energy and standby losses. For all systems, refer to
equation N2-62. |
|
SRL |
The standard recovery
load, taken from Appendix 5.4A, in Btu/hr, adjusted for the number
of occupants according to the occupancy
schedules. |
|
S |
The standby loss
fraction listed in the Energy Commission’s Appliance Database of
Certified Water Heaters |
|
VOL |
The actual storage
capacity of the water heater as listed in the Appliance Database of
Certified Water Heaters |
|
|
Standard Design |
Not applicable |
|
Standard Design:
Existing Buildings |
|
5.9.1.3 Recirculation
Systems
This section describes the building descriptors
for hot water recirculation systems. The standard design has a recirculation system when the
proposed design does. This is one aspect of the water heating system
configuration (see above).
Recirculating systems shall follow
the rules set forth in Appendix E of the Residential ACM Reference Manual.
5.9.1.4 Water Heating
Auxiliaries
|
External Storage Tank Insulation |
|
Applicability |
All water heating systems that have an external storage
tank |
|
Definition |
Some water heating systems have a storage tank that is
separate from the water heater(s) that provides additional storage
capacity. This building descriptor addresses the heat loss related to
the external tank, which is an additional load that must be satisfied by
the water heater(s). |
|
Units |
R-value (h-ft2-F/Btu) |
|
Input Restrictions |
As specified in
manufacturer data and documented on the construction documents |
|
Standard Design |
Heat loss associated with the storage tank in the
standard design shall meet the requirements for an unfired storage tank in
the baseline standards which is an insulation R-value of 12.5. The
surface area and location of the storage tank shall be the same as the
proposed design. |
|
Standard Design:
Existing Buildings |
|
|
External Storage Tank
Area |
|
Applicability |
All water heating systems that have an external storage
tank |
|
Definition |
Some water heating systems have a storage tank that is
separate from the water heater(s) that provides additional storage
capacity. This documents the entire exterior surface area of the
tank. |
|
Units |
ft2 |
|
Input Restrictions |
As specified in
manufacturer specifications |
|
Standard Design |
Not applicable |
|
Standard Design:
Existing Buildings |
|
|
External Storage Tank
Location |
|
Applicability |
All water heating systems that have an external storage
tank |
|
Definition |
Location of the storage tank, used to determine the
heat loss rate and energy exchange with the surroundings |
|
Units |
List schedule, zone,
outdoors |
|
Input Restrictions |
As designed |
|
Standard Design |
Not applicable |
|
Standard Design:
Existing Buildings |
|
|
Solar
Thermal |
|
Applicability |
Water heating systems with a solar thermal system |
|
Definition |
A solar thermal water heating system consists of one or
more collectors. Water is passed through these collectors and is heated
under the right conditions. There are two general types of solar water
heaters: integrated collector storage (ICS) systems and active systems.
Active systems include pumps to circulate the water, storage tanks,
piping, and controls. ICS systems generally have no pumps and piping is
minimal.
Solar systems may be tested and rated as a complete
system or the collectors may be separately tested and rated. Solar Rating
& Certification Corporation (SRCC) OG-300 is the test
procedure for whole systems and SRCC OG-100 is the test procedure for
collectors. The building descriptors used to define the solar thermal
system may vary with each software application and with the details of
system design.
The solar fraction shall be estimated by the f-chart
procedure for solar water heating systems. |
|
Units |
Unitless fraction |
|
Input Restrictions |
For high-rise residential
buildings, the solar fraction provided by the solar DHW system shall be
between 0 and 1. For all other buildings, the value is 0 (solar thermal
may not be modeled for compliance.) |
|
Standard Design |
The standard design has no solar auxiliary
system. |
|
Standard Design:
Existing Buildings |
|
|
Combined Space Heating
and Water Heating |
|
Applicability |
Projects that use a boiler to provide both space heat
and water heating |
|
Definition |
A system that provides both space heating and water
heating from the same equipment, generally the space heating boiler. Such
systems are restricted by the baseline standards but may be modeled in the
candidate building. The restrictions are due to the misalignment of the
space heating load and the water heating load. The first is highly
intermittent and weather dependent, and the latter is more constant and
not generally weather-related. |
|
Units |
Data structure |
|
Input Restrictions |
The proposed design may
have a combined space and water heating system. |
|
Standard Design |
The standard design shall be modeled with separate
space heating and water heating systems. |
|
Standard Design:
Existing Buildings |
|
5.9.2
Exterior Lighting
Outdoor lighting requirements
are specified in Section
140.7 of the standards. Outdoor lighting shall not be modeled in the
proposed design or standard design, and no tradeoffs are available with other building end uses or
systems. Outdoor lighting shall meet all prescriptive requirements in the
standards.
5.9.3
Other Electricity Use
This set of building descriptors should be used
to include any miscellaneous electricity use that would add to the electric load
of the building and would be on the building meter. These energy uses are
assumed to be outside the building envelope and do not contribute heat gain to any
thermal zone.
|
Miscellaneous Electric
Power |
|
Applicability |
All buildings with miscellaneous electric equipment
located on the building site |
|
Definition |
The power for miscellaneous equipment |
|
Units |
Watts (W) |
|
Input Restrictions |
As designed |
|
Standard Design |
Same as the proposed design |
|
Standard Design:
Existing Buildings |
|
|
Miscellaneous Electric
Schedule |
|
Applicability |
All buildings with miscellaneous electric equipment
located on the building site |
|
Definition |
The schedule of operation for miscellaneous electric
equipment that is used to convert electric power to energy use |
|
Units |
Data structure - schedule,
fractional |
|
Input Restrictions |
The schedule specified for
the building should match the operation patterns of the system. |
|
Standard Design |
Same as the proposed design |
|
Standard Design:
Existing Buildings |
|
5.9.4
Other Gas Use
This set of building descriptors should be used
to include any miscellaneous gas use that would add to the load of the building
and would be on the building meter. These energy uses are assumed to be outside
the building
envelope and do not contribute heat gain to any thermal zone.
|
Other Gas
Power |
|
Applicability |
All buildings that have commercial gas equipment |
|
Definition |
Gas power is the peak power which is modified by the
schedule (see below). |
|
Units |
Btu/h-ft² |
|
Input Restrictions |
As designed |
|
Standard Design |
Same as the proposed design |
|
Standard Design:
Existing Buildings |
|
|
Other Gas
Schedule |
|
Applicability |
All buildings that have commercial gas
equipment |
|
Definition |
The schedule of operation for commercial gas equipment
that is used to convert gas power to energy use |
|
Units |
Data structure - schedule,
fractional |
|
Input Restrictions |
Continuous operation is
prescribed |
|
Standard Design |
Same as the proposed design |
|
Standard Design:
Existing Buildings |
|