CIBSE Gain Design Conditions and Fresh Air

Shane Regan — Wed, 11 May 2022 10:43:46 GMT

Current Revision posted to OpenBuildings | AECOsim | Speedikon Wiki by Shane Regan on 5/11/2022 10:43:46 AM

	Product(s):	OpenBuildings Energy Simulator
	Version(s):	CONNECT Edition
	Environment:	N/A
	Area:	Calculations
	Subarea:	N/A

Overview

Design conditions for the CIBSE Gain calculation in OpenBuildings Energy Simulator, including allowing for the introduction of fresh air or conditioned air, can be set by using the Design Data tab within the CIBSE Gain calculation.

Method

This menu is where design conditions can be set, such as Supply Temperature:

Outdoor Conditions can be set as below. Any values can be entered manually, or select the desired day and press the Re-calculate button to update the figures:

Fresh Air Loads, can also be specified as follows:

The available Fresh Air Loads options are:

This option is for conditioning the room locally by means of fan coil units. Fresh air is not being introduced directly into the room, or at the main plant.

This option is for local conditioning via fan coils and the introduction of untreated air into the room. The untreated air could be introduced into the fan coil unit, directly into the room, or ceiling void.

This option is for local cooling in the room (fan coil units) but also have a fresh air requirement that is being managed by central plant.

The temperature of the primary fresh air must be specified. You can also set a humidity control for the primary fresh air if desired. The central plant will then be modeled based on the heating/cooling and humidify/dehumidify parameters.

When considering this option, individual room load results will be affected as the cooling on the primary fresh air will be considered. The plant results will display the fresh air conditioning loads.

This option is for all the conditioning at central plant with no local cooling. This could either be by recirculation or a full fresh air system. The illustration shows a recirculation system where primary fresh air is mixed with recirculation air then cooled to the defined supply temperature before being introduced to the room. With this option, room loads will not be affected as there is no requirement for local conditioning. The total plant loads will increase to indicate the fresh air load being handled.

Tags: CIBSE Gain, OpenBuildings Energy Simulator, Fresh Air Loads

CIBSE Gain Design Conditions and Fresh Air

Krishnendu Paul — Mon, 21 Feb 2022 16:12:12 GMT

Revision 15 posted to OpenBuildings | AECOsim | Speedikon Wiki by Krishnendu Paul on 2/21/2022 4:12:12 PM

	Product(s):	OpenBuildings Energy Simulator
	Version(s):	CONNECT Edition
	Environment:	N/A
	Area:	Calculations
	Subarea:	N/A

Overview

Here the steady state HVAC used by CIBSE Gain can be seen - "SteadyState, heat gain and loss":

Method

The design settings are available under the dropdowns on the right, for example:

SteadyState:Controller

This is where design conditions can be set, such as Supply Temperature:

To include Fresh Air Loads, select:

For No Additional Fresh Air Loads select Unspecified:

SteadyState:FreshAirLoads

Fresh air settings can be found as below:

The available Fresh Air options are:

This option is for conditioning the room locally by means of fan coil units. Fresh air is not being introduced directly into the room, or at the main plant.

This option is for local cooling in the room (fan coil units) but also have a fresh air requirement that is being managed by central plant.

Tags: CIBSE Gain, OpenBuildings Energy Simulator, Fresh Air Loads

CIBSE Gain Design Conditions and Fresh Air

Shane Regan — Thu, 02 Dec 2021 14:26:52 GMT

Revision 14 posted to OpenBuildings | AECOsim | Speedikon Wiki by Shane Regan on 12/2/2021 2:26:52 PM

	Product(s):	OpenBuildings Energy Simulator
	Version(s):	CONNECT Edition
	Environment:	N/A
	Area:	Calculations
	Subarea:	N/A

Overview

Here the steady state HVAC used by CIBSE Gain can be seen - "SteadyState, heat gain and loss":

Method

The design settings are available under the dropdowns on the right, for example:

SteadyState:Controller

This is where design conditions can be set, such as Supply Temperature:

To include Fresh Air Loads, select:

For No Additional Fresh Air Loads select Unspecified:

SteadyState:FreshAirLoads

Fresh air settings can be found as below:

The available Fresh Air options are:

This option is for conditioning the room locally by means of fan coil units. Fresh air is not being introduced directly into the room, or at the main plant.

This option is for local cooling in the room (fan coil units) but also have a fresh air requirement that is being managed by central plant.

Tags: CIBSE Gain, OpenBuildings Energy Simulator, Fresh Air Loads

CIBSE Gain Design Conditions and Fresh Air

Shane Regan — Wed, 01 Sep 2021 09:36:24 GMT

Revision 13 posted to OpenBuildings | AECOsim | Speedikon Wiki by Shane Regan on 9/1/2021 9:36:24 AM

	Product(s):	OpenBuildings Energy Simulator
	Version(s):	CONNECT Edition
	Environment:	N/A
	Area:	Calculations
	Subarea:	N/A

Overview

Here the steady state HVAC used by CIBSE Gain can be seen - "SteadyState, heat gain and loss":

Method

The design settings are available under the dropdowns on the right, for example:

SteadyState:Controller

This is where design conditions can be set, such as Supply Temperature:

To include Fresh Air Loads, select:

For No Additional Fresh Air Loads select Unspecified:

SteadyState:FreshAirLoads

Fresh air settings can be found as below:

The available Fresh Air options are:

This option is for conditioning the room locally by means of fan coil units. Fresh air is not being introduced directly into the room, or at the main plant.

This option is for local cooling in the room (fan coil units) but also have a fresh air requirement that is being managed by central plant.

Tags: CIBSE Gain, OpenBuildings Energy Simulator, Fresh Air Loads

CIBSE Gain Design Conditions and Fresh Air

Krishnendu Paul — Tue, 13 Jul 2021 12:15:12 GMT

Revision 12 posted to OpenBuildings | AECOsim | Speedikon Wiki by Krishnendu Paul on 7/13/2021 12:15:12 PM

	Product(s):	OpenBuildings Energy Simulator
	Version(s):	CONNECT Edition
	Environment:	N/A
	Area:	Calculations
	Subarea:	N/A

Overview

Here the steady state HVAC used by CIBSE Gain can be seen - "SteadyState, heat gain and loss":

Method

The design settings are available under the dropdowns on the right, for example:

SteadyState:Controller

This is where design conditions can be set, such as Supply Temperature:

To include Fresh Air Loads, select:

For No Additional Fresh Air Loads select Unspecified:

SteadyState:FreshAirLoads

Fresh air settings can be found as below:

The available Fresh Air options are:

This option is for conditioning the room locally by means of fan coil units. Fresh air is not being introduced directly into the room, or at the main plant.

This option is for local cooling in the room (fan coil units) but also have a fresh air requirement that is being managed by central plant.

Tags: CIBSE Gain, OpenBuildings Energy Simulator, Fresh Air Loads

CIBSE Gain Design Conditions and Fresh Air

Shane Regan — Thu, 01 Jul 2021 13:18:42 GMT

Revision 11 posted to OpenBuildings | AECOsim | Speedikon Wiki by Shane Regan on 7/1/2021 1:18:42 PM

	Product(s):	OpenBuildings Energy Simulator
	Version(s):	CONNECT Edition
	Environment:	N/A
	Area:	Calculations
	Subarea:	N/A

Overview

Here the steady state HVAC used by CIBSE Gain can be seen - "SteadyState, heat gain and loss":

Method

The design settings are available under the dropdowns on the right, for example:

SteadyState:Controller

This is where design conditions can be set, such as Supply Temperature:

To include Fresh Air Loads, select:

For No Additional Fresh Air Loads select Unspecified:

SteadyState:FreshAirLoads

Fresh air settings can be found as below:

The available Fresh Air options are:

This option is for conditioning the room locally by means of fan coil units. Fresh air is not being introduced directly into the room, or at the main plant.

This option is for local cooling in the room (fan coil units) but also have a fresh air requirement that is being managed by central plant.

Tags: CIBSE Gain, OpenBuildings Energy Simulator, Fresh Air Loads

CIBSE Gain Design Conditions and Fresh Air

Shane Regan — Thu, 21 Jan 2021 16:28:01 GMT

Revision 10 posted to OpenBuildings | AECOsim | Speedikon Wiki by Shane Regan on 1/21/2021 4:28:01 PM

	Product(s):	OpenBuildings Energy Simulator
	Version(s):	CONNECT Edition
	Environment:	N/A
	Area:	Calculations
	Subarea:	N/A

Overview

Here the steady state HVAC used by CIBSE Gain can be seen - "SteadyState, heat gain and loss":

Method

The design settings are available under the dropdowns on the right, for example:

SteadyState:Controller

This is where design conditions can be set, such as Supply Temperature:

To include Fresh Air Loads, select:

For No Additional Fresh Air Loads select Unspecified:

SteadyState:FreshAirLoads

Fresh air settings can be found as below:

The available Fresh Air options are:

This option is for conditioning the room locally be means of fan coil units. Fresh air is not being introduced directly into the room, or at the main plant.

This option is for local cooling in the room (fan coil units) but also have a fresh air requirement that is being managed by central plant.

Tags: CIBSE Gain, OpenBuildings Energy Simulator, Fresh Air Loads

CIBSE Gain Design Conditions and Fresh Air

Shane Regan — Thu, 21 Jan 2021 15:38:47 GMT

Revision 9 posted to OpenBuildings | AECOsim | Speedikon Wiki by Shane Regan on 1/21/2021 3:38:47 PM

	Product(s):	OpenBuildings Energy Simulator
	Version(s):	CONNECT Edition
	Environment:	N/A
	Area:	Calculations
	Subarea:	N/A

Overview

Method

Here the steady state HVAC used by CIBSE Gain can be seen - "SteadyState, heat gain and loss":

The settings are available under the dropdowns on the right, for example:

Controller is where design conditions can be set, such as Supply Temperature:

FreshAirLoads settings can be found as below:

The available Fresh Air options are:

Fresh air introduced locally to rooms
Conditioned primary fresh air
Fresh air from central plant with conditioned air

This option is for conditioning the room locally be means of fan coil units. Fresh air is not being introduced directly into the room, or at the main plant.

This option is for local cooling in the room (fan coil units) but also have a fresh air requirement that is being managed by central plant.

Tags: CIBSE Gain, OpenBuildings Energy Simulator, Fresh Air Loads

CIBSE Gain Design Conditions and Fresh Air

Shane Regan — Thu, 21 Jan 2021 15:14:13 GMT

Revision 8 posted to OpenBuildings | AECOsim | Speedikon Wiki by Shane Regan on 1/21/2021 3:14:13 PM

	Product(s):	OpenBuildings Energy Simulator
	Version(s):	CONNECT Edition
	Environment:	N/A
	Area:	Calculations
	Subarea:	N/A

Overview

Method

Here the steady state HVAC used by CIBSE Gain can be seen - "SteadyState, heat gain and loss". - where design conditions can be set, eg:

Fresh air settings can be found as below,

The available options are:

Fresh air introduced locally to rooms
Conditioned primary fresh air
Fresh air from central plant with conditioned air

This option is for conditioning the room locally be means of fan coil units. Fresh air is not being introduced directly into the room, or at the main plant.

This option is for local cooling in the room (fan coil units) but also have a fresh air requirement that is being managed by central plant.

Tags: OpenBuildings Energy Simulator, Fresh Air Loads

CIBSE Gain Design Conditions and Fresh Air

Shane Regan — Thu, 21 Jan 2021 12:27:23 GMT

Revision 7 posted to OpenBuildings | AECOsim | Speedikon Wiki by Shane Regan on 1/21/2021 12:27:23 PM

	Product(s):	OpenBuildings Energy Simulator
	Version(s):	CONNECT Edition
	Environment:	N/A
	Area:	Calculations
	Subarea:	N/A

Overview

Method

Here the steady state HVAC used by CIBSE Gain can be seen - "SteadyState, heat gain and loss". - where design conditions can be set, eg:

Fresh air settings can be found as below,

The available options are:

No additional fresh air
Fresh air introduced locally to rooms
Conditioned primary fresh air
Fresh air from central plant with conditioned air

This option is for conditioning the room locally be means of fan coil units. Fresh air is not being introduced directly into the room, or at the main plant.

This option is for local cooling in the room (fan coil units) but also have a fresh air requirement that is being managed by central plant.

Tags: OpenBuildings Energy Simulator, Fresh Air Loads

Design Conditions and Fresh Air

Shane Regan — Mon, 21 Dec 2020 09:59:38 GMT

Revision 6 posted to OpenBuildings | AECOsim | Speedikon Wiki by Shane Regan on 12/21/2020 9:59:38 AM

	Product(s):	OpenBuildings Energy Simulator
	Version(s):	CONNECT Edition
	Environment:	N/A
	Area:	Calculations
	Subarea:	N/A

Overview

Method

Here the steady state HVAC used by CIBSE Gain can be seen - "SteadyState, heat gain and loss". - where design conditions can be set, eg:

Fresh air settings can be found as below,

The available options are:

No additional fresh air
Fresh air introduced locally to rooms
Conditioned primary fresh air
Fresh air from central plant with conditioned air

This option is for conditioning the room locally be means of fan coil units. Fresh air is not being introduced directly into the room, or at the main plant.

This option is for local cooling in the room (fan coil units) but also have a fresh air requirement that is being managed by central plant.

Tags: OpenBuildings Energy Simulator, Fresh Air Loads

Fresh Air Loads

Shane Regan — Wed, 05 Aug 2020 11:14:18 GMT

Revision 5 posted to OpenBuildings | AECOsim | Speedikon Wiki by Shane Regan on 8/5/2020 11:14:18 AM

	Product(s):	OpenBuildings Energy Simulator
	Version(s):	CONNECT Edition
	Environment:	N/A
	Area:	Calculations
	Subarea:	N/A

Overview

The CIBSE Gain calculation in OpenBuildings Energy Simulator allows for the introduction of fresh air or conditioned air.

These settings can be found in HVAC Manager as below, under the HVAC System "SteadyState, heat gain and loss".

Method

The available options are:

No additional fresh air
Fresh air introduced locally to rooms
Conditioned primary fresh air
Fresh air from central plant with conditioned air

This option is for conditioning the room locally be means of fan coil units. Fresh air is not being introduced directly into the room, or at the main plant.

This option is for local cooling in the room (fan coil units) but also have a fresh air requirement that is being managed by central plant.

Tags: OpenBuildings Energy Simulator, Fresh Air Loads

Fresh Air Loads

Steve Cocchi — Mon, 18 May 2020 15:32:01 GMT

Revision 4 posted to OpenBuildings | AECOsim | Speedikon Wiki by Steve Cocchi on 5/18/2020 3:32:01 PM

	Product(s):	OpenBuildings Energy Simulator
	Version(s):	CONNECT Edition
	Environment:	N/A
	Area:	Calculations
	Subarea:	N/A

Overview

OpenBuildings Energy Simulator contains a number of calculation modules that allow for the introduction of conditioned air into a space. These can be found in HVAC Manager as below:

Method

The available options are:

No additional fresh air
Fresh air introduced locally to rooms
Conditioned primary fresh air
Fresh air from central plant with conditioned air

This option is for conditioning the room locally be means of fan coil units. Fresh air is not being introduced directly into the room, or at the main plant.

This option is for local cooling in the room (fan coil units) but also have a fresh air requirement that is being managed by central plant.

Tags: OpenBuildings Energy Simulator, Fresh Air Loads

Fresh Air Loads

Shane Regan — Fri, 15 May 2020 13:29:12 GMT

Revision 3 posted to OpenBuildings | AECOsim | Speedikon Wiki by Shane Regan on 5/15/2020 1:29:12 PM

	Product(s):	OpenBuildings Energy Simulator
	Version(s):	CONNECT Edition
	Environment:	N/A
	Area:	Calculations
	Subarea:	N/A

Overview

OpenBuildings Energy Simulator contains a number of calculation modules that allow for the introduction of conditioned air into a space. These can be found in HVAC Manager as below:

Method

The available options are:

No additional fresh air
Fresh air introduced locally to rooms
Conditioned primary fresh air
Fresh air from central plant with conditioned air

This option is for conditioning the room locally be means of fan coil units. Fresh air is not being introduced directly into the room, or at the main plant.

This option is for local cooling in the room (fan coil units) but also have a fresh air requirement that is being managed by central plant.

Tags: OpenBuildings Energy Simulator, Fresh Air Loads

Fresh Air Loads

Shane Regan — Mon, 27 Apr 2020 14:50:14 GMT

Revision 2 posted to OpenBuildings | AECOsim | Speedikon Wiki by Shane Regan on 4/27/2020 2:50:14 PM

	Product(s):	OpenBuildings Energy Simulator
	Version(s):	CONNECT Edition
	Environment:	N/A
	Area:	Building Modelling
	Subarea:	N/A

Overview

OpenBuildings Energy Simulator contains a number of calculation modules that allow for the introduction of conditioned air into a space. These can be found in HVAC Manager as below:

Method

The available options are:

No additional fresh air
Fresh air introduced locally to rooms
Conditioned primary fresh air
Fresh air from central plant with conditioned air

This option is for conditioning the room locally be means of fan coil units. Fresh air is not being introduced directly into the room, or at the main plant.

This option is for local cooling in the room (fan coil units) but also have a fresh air requirement that is being managed by central plant.

Tags: OpenBuildings Energy Simulator, Fresh Air Loads

Fresh Air Loads

Shane Regan — Mon, 27 Apr 2020 13:56:39 GMT

Revision 1 posted to OpenBuildings | AECOsim | Speedikon Wiki by Shane Regan on 4/27/2020 1:56:39 PM

	Product(s):	OpenBuildings Energy Simulator
	Version(s):	CONNECT Edition
	Environment:	N/A
	Area:	Building Modelling
	Subarea:	N/A

Overview

OpenBuildings Energy Simulator contains a number of calculation modules that allow for the introduction of conditioned air into a space

Method

The available options are:

No additional fresh air
Fresh air introduced locally to rooms
Conditioned primary fresh air
Fresh air from central plant with conditioned air

This option is for conditioning the room locally be means of fan coil units. Fresh air is not being introduced directly into the room, or at the main plant.

This option is for local cooling in the room (fan coil units) but also have a fresh air requirement that is being managed by central plant.

Tags: OpenBuildings Energy Simulator, Fresh Air Loads