Hot Water Loops

Location = Templates/System Templates/Hot Water Loops

Portions of the heating side of the HVAC system can be provided by the loop configuration of the hot water loop(s). A complete hot water loop is composed of a supply side and a demand side. The supply side is composed of different component shapes that are connected together and contain the required properties so that EnergyPlus can run effectively. In addition, controllers can be connected to a number of different components, which allows a range control types and schemes to be introduced into the water loop. When working in the water loop template workspace you can create the supply side of the water loop. Once a hot waterloop template has been saved to the source library it is an option for you to select when you are creating a hot water loop in your model in the Systems: Hot Water Loops Create/Edit workspace. The demand side of the hot water loop can only be created in the Systems:Diagram workspaces. It cannot be created in the Templates workspace and saved with a Hot Water Loop Template.

The Hot Water Loops workspace is broken down into six main areas described in the System Templates Workspace, and is very similar in composition and capabilities to the Water Loops Create & Edit Workspace. In addition, the Hot Water Loop System Templates workspace is similar to the Chilled Water, Condenser and Mixed Water Loop System Templates workspaces. The user can visualize, edit and create new Hot Water Loop diagrams.

The following provide more detailed information for the main areas, and the features within them.

System Template Naming/Selection Area - the drop down list where the templates from the active source library can be selected, and descriptions can be associated with each template as well.

Chilled Water Loop Parameters Area - the properties that can be set at the overall loop level

Component Properties - the properties that appear in the lower left when a component shape is selected in the HVAC Diagramming Canvas

Stencils - include the component, controller and sensor shapes that can be dragged and dropped onto the HVAC Diagramming Canvas to create or edit the templates

HVAC Diagramming Canvas - the loop creation playground where the component shapes can be dragged and dropped onto, different components can be connected, components selected to edit properties and other features.

Loop Level Controls - displays the current Condenser Operation Schemes and Availability Managers that are defined for the template.

Validation - The location where the error messages are displayed after the Chilled Water Loop Ruleset has been run (Validate)

Hot Water Loop System Templates

The table displays the Hot Water Loop System Templates that are included with version 1. The Hot Water Loop System Templates utilize a naming convention, so that the names can be represented in an abbreviated manner.

Note: Hot water templates can be edited and resaved or copied, edited and saved as new templates.

Chilled Water Loop System Templates	Full Name & Description
ASHRAE-Boil(1)_HW_VSD	ASHRAE Standard 90.1 required inputs for a system with one hot water boiler that is driven by a variable speed pump
ASHRAE-Boil(2)_HW_VSD	ASHRAE Standard 90.1 required inputs for a system with two hot water boilers that are driven by a set of two headered variable speed pumps
Blr(1)_HW_Pv	A system with one hot water boiler that is driven by a variable speed pump
Blr(1)_HW_Pv_Radiant	A system with one hot water boiler that is driven by a variable speed pump that have inputs for servicing radiant components (lower water temperature)
Blr(2)_HW_VSD(2)	A system with two hot water boilers driven by a set of two headered variable speed pumps
Blr(2)_HW_VSD(2)_Radiant	A system with two hot water boilers driven by a set of two headered variable speed pumps that have inputs for servicing radiant components (lower water temperature)
Boil_HW_VSD	A system with one hot water boiler that is driven by a variable speed pump
Boil_HW_VSD_Radiant	A system with one hot water boiler that is driven by a variable speed pump that have inputs for servicing radiant components (lower water temperature)
DistH_SSD	A district heating system with a constant speed pump
DistH_VSD	A district heating system with a variable speed pump

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