What is the Hourly Analysis Program (HAP)? Carrier’s Hourly Analysis Program is two powerful tools in one package. HAP provides versatile features for designing HVAC systems for commercial buildings. It also offers powerful energy analysis capabilities for comparing energy consumption and operating costs of design alternatives.
By combining both tools in one package significant time savings are achieved. Input data and results from system design calculations can be used directly in energy studies.
Who Can Benefit from HAP? HAP is designed for consulting engineers, design/build contractors, HVAC contractors, facility engineers and other professionals involved in the design and analysis of commercial building HVAC systems. In addition HAP’s 8760 hour energy analysis capabilities are very useful for green building design. For instance, HAP energy analysis results are accepted by the U.S. Green Building Council for its LEED™ (Leadership in Energy and Environmental Design) Rating System. (Visit www.usgbc.org for more LEED™ info at the USGBC’s website.) Useful Applications The program is a powerful tool for designing systems and sizing system components.
HAP can easily handle projects involving: Small to large commercial buildings. Systems including packaged rooftops, packaged and built-up central air handlers, fan coils, and PTACs and more. Many types of constant volume and VAV system controls. Small office buildings, retail stores, strip shopping centers, schools, churches, restaurants, large office buildings, hotels, malls, hospitals, factories and multi-use buildings.
New design, retrofit or energy conservation work. For installing the new HAP version Download the files form the links below and install to your PC. First install the ‘HAP Configuration Services’ as supporting environment for the HAP. Afterwards install the new ‘HAP 5.11’. To obtain the Authcode, download & fill in the ‘HAP Authcode Form’ and send it by e-mail to: [email protected]. Please, address your request to above e-mail only if you are a resident of Greece, Cyprus, Albania, Bulgaria, Montenegro, Romania, Serbia or FYROM, or else contact your local distributor for further information.
3, Issue 1 Understanding the User-Defined Sizing Option for HAP Air Systems Normally Carrier's Hourly Analysis Program (HAP) is used to automatically determine sizing requirements for HVAC systems such as supply and ventilation airflow rates, and coil capacities. However, there are applications where it is necessary to manually define this HVAC sizing data and then evaluate the resulting system performance at peak load conditions or for full year energy performance.
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This article describes how the 'user-defined sizing' feature for air-side systems in HAP can be used for these applications. Typical Applications. The following are two common applications for the 'user-defined sizing' feature for air-side systems:. Retrofits - Suppose you're applying energy conservation measures, or replacing components and controls in an existing building and want to evaluate the effect on system energy performance. Therefore the HVAC system already exists and airflow rates and duct sizes are set. Troubleshooting - Suppose you're working with an existing building in which you believe the HVAC system is either oversized or undersized. By specifying actual system airflow rates you can simulate system performance at peak load conditions to determine if the system is over- or under-sized, evaluate potential consequences, and evaluate corrective actions.
Or you can determine the effect on annual energy performance of a right-sized system versus a mis-sized system. How it Works. In the Air System Properties window, on the left side of the Sizing Tab inputs are provided for choosing 'Computer-Generated' or 'User-Defined' sizing for the system. If you select 'Computer-Generated', HAP will automatically calculate all of the data in Table 1 applicable to your system based on peak load conditions and your system specifications. On the other hand, if you choose 'User-Defined', HAP will require you to directly specify the data in Table 1 using inputs on the Air System Sizing and Zone Sizing data screens on the Sizing Tab.
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If you select 'User-Defined' sizing for an air system that was previously calculated, the initial calculation results will be preserved as defaults and you only need to modify the values needing adjustment. On the other hand, if you select 'User Defined' for an air system not yet calculated, all the sizing values will initially be zero and you'll be responsible for defining all the values yourself.
Regardless of which option is selected, the sizing data in Table 2 is computer-generated by HAP. Note that there are separate options for manually specifying DX equipment capacities (see Air System Properties, Equipment Tab) and for hydronic equipment (see Plant Properties window) that relate to many of the Table 2 elements.
In many situations the DX sizing options match 1 to 1 with coils in Table 2. For hydronic equipment, user-defined sizing is done on a plant level rather than a coil by coil level. Sizing Data Affected by User-Defined Sizing Option.
Zone and system supply airflow rates. System outdoor ventilation airflow rate. Zone-level outdoor ventilation airflow rates (Terminal systems - FCUs, WSHPs, VRF) Zone-level primary airflow rates (Induction Beams, Active Chilled Beams) Zone-level parallel fan powered mixing box fan airflows (parallel fan powered mixing box terminals only) Terminal reheat coil capacities (CAV and VAV systems with reheat coils) Supplemental zone heating unit capacities (baseboard and fan coil units) Table 2. Sizing Data Not Affected by User-Defined Sizing Option. Space by space supply airflow rates. Central cooling and heating coil capacities (CAV and VAV central systems) Precool and preheat coil capacities (CAV and VAV central systems) Ventilation cooling and heating coil capacities (Ventilation AHUs) Terminal cooling and heating coil capacities (FCUs, WSHPs, VRF, Induction Beams, Active Chilled Beams) Consequences. When selecting the 'User-Defined' sizing option, it is important to understand resulting consequences for design and energy simulation calculations.
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Three of the key consequences are listed below. Sizing Calculations - If you select 'User-Defined' sizing, no sizing calculations will be done for data shown in Table 1. The most important consequence here is that the program will not perform any ASHRAE Standard 62.1 Ventilation Rate Procedure calculations. Instead it will directly use the ventilation airflow rates specified on the Air System Sizing or Zone Sizing data screens. Because no ventilation sizing calculations are done, no data will be available on the Ventilation Sizing Summary to assess ventilation performance on a space by space level. Design Supply Temperatures - When 'User-Defined' sizing is selected, the design supply air temperatures shown on the Sizing Tab will be used for system control instead of design supply air temperatures specified earlier on the System Components or Zone Components tabs.
Therefore, if you modify the supply air temperatures on the Air System Sizing data screen, be aware these modified values become the basis for control of system supply air temperatures. Undersizing or Oversizing - The user-specified sizing values are used in system calculations whether or not they are sufficient to meet cooling and heating demands in the building. For example if an airflow rate or coil capacity from Table 1 is not sufficient to meet a peak cooling or heating demand, temperature control in the conditioned zone will be lost and zone temperatures can rise to excessively warm values or fall to excessively cold values. In certain trouble-shooting applications, this is the desired result since the objective of undersizing is to determine the effect on system control. Also note that this will likely result in large numbers of zone-temperature-out-of-range hours in the energy simulation.
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LEED Interpretation ID# made on Prerequisite/Credit: EAc6 - Space heating and cooling equipment Rating System: LEED BD+C: Homes Rating System Version: v3 - LEED 2008 The V&S Guidelines indicate that the Green Rater should verify 'calculation of total effective length (TEL) for the longest supply and return duct run.' What if the TEL is embedded withi. Ruling: If the TEL cannot be verified, it's acceptable to verify an equivalent calculation for the friction coeffecient or pressure drop over the ductwork. TEL is one way to estimate pressure drop over ductwo. LEED Interpretation ID# made on Prerequisite/Credit: EAc6 - Space heating and cooling equipment Rating System: LEED BD+C: Homes Rating System Version: v3 - LEED 2008 EQ 6.1 states: '(using ACCA Manuals J and D, the ASHRAE Handbook of Fundamentals, or an equivalent computation procedure)' The project team intends to use the Carrier E20-II software to cal.
Ruling: Green Rater has some discretion in determining this. The software needs to have the capability to produce room-by-room load calculations based on specific features of the home (e.g.
Location, green EE. LEED Interpretation ID# made on Prerequisite/Credit: EAc6 - Space heating and cooling equipment Rating System: LEED BD+C: Homes Rating System Version: v3 - LEED 2008 EQ 6.1 requires ACCA Manual D or an equivalent. If a project installs a ductless system, such as a mini-split, is this requirement waived? Ruling: A Manual D calculation is not required, but ductless projects still have to do calculations to determine the room-by-room loads based on specific features of the home and then calculations to determin. LEED Interpretation ID# made on Prerequisite/Credit: EAc6 - Space heating and cooling equipment Rating System: LEED BD+C: Homes Rating System Version: v3 - LEED 2008 EQ 6.2 (a) requires 'Size the opening to 1 square inch per cfm of supply (this area may include free area undercut below door)', and allows various strategies including returns, transfer gri.
Ruling: If a project installs returns that are ducted directly to the AHU in every room, and these returns are properly sized as per Manual D, then the intent of EQ 6.2 (a) has been met and the project may be. LEED Interpretation ID# made on Prerequisite/Credit: EAc6 - Space heating and cooling equipment Rating System: LEED BD+C: Homes Rating System Version: v3 - LEED 2008 For part (a), what is the maximum allowable oversizing? Does it differ depending on whether heating or cooling is the primary concern?
Ruling: LEED for Homes follows the guidance in the ENERGY STAR for Homes BOP: 'Maximum oversizing limit for air conditioners and heat pumps is 15% (with the exception of heat pumps in Climate Zones 5 - 8. LEED Interpretation ID# made on Prerequisite/Credit: EAc6 - Space heating and cooling equipment Rating System: LEED BD+C: Homes Rating System Version: v3 - LEED 2008 For part (a), if a multi-family project conducts the Manual J calculation and estimates that the proper HVAC size is smaller than any commercially available unit (1.5 tons), how should the prerequisit. Ruling: If the Manual J calculations indicates the need for an HVAC unit that is smaller than any commercially available unit, it is acceptable to put in a slightly oversized unit. LEED Interpretation ID# made on Prerequisite/Credit: EAc6 - Space heating and cooling equipment Rating System: LEED BD+C: Homes Rating System Version: v3 - LEED 2008 For part (a), can the Carrier Hourly Analysis Program (Version 4.34) be used in multi-family projects instead of Manual J? This method conducts an hourly analysis of unit loading rather than the peak. Ruling: The requirement allows 'an equivalent computation procedure'. The burden of proof lies with the project team to demonstrate to the Green Rater and Provider's satisfaction that a methodology.
LEED Interpretation ID# made on Prerequisite/Credit: EAc6 - Space heating and cooling equipment Rating System: LEED BD+C: Homes Rating System Version: v3 - LEED 2008 EQ 6.2 gives 1 point for flow control valves on every radiator, but EQ 6.3 gives 2 points for having 2 or more distinct zones with independent thermostat controls. What does this mean, and why does it. Ruling: EQ 6.3 now is granted for having 2 or more distinct zones with independent thermostatic controls. Independent zones must include separate loops and separate pumps controlled automatically by a thermos.