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Task 34


Subtask A: Ground Coupled Floor Slab Comparative Tests

Subtask Lead Country: United States
Subtask Leaders: Joel Neymark and Ron Judkoff, National Renewable Energy Laboratory, US

The objective of Project A is to assess the accuracy of building energy analysis tools that have incorporated detailed models for predicting ground-coupled heat transfer related to floor slab and basement constructions.

Fundamental Ground-Coupled Heat Transfer Test Case Schematic Diagram, Section View


Subtask B: Multi-Zone and Airflow Comparative Tests

Subtask Lead Countries: Japan, United States
Subtask Leaders:
Non-Airflow Tests: Joel Neymark and Ron Judkoff, National Renewable Energy Laboratory, US
Airflow Tests: Yasuo Utsumi, Institutes of National Colleges of Technology, Japan

The objective of Project B is to specify a set of comparative test or analytical verification cases that investigate the comparability among simulation programs for modeling multi-zone configurations, including airflow test cases for both single-zone and multi-zone configurations.

Multi-Zone Building with Shading Element, Schematic Diagram

Combined Wind and Temperature Driven Airflow Test Case, Schematic Diagram


Subtask C: Shading/Daylighting/Load Interaction Empirical Tests

Subtask Lead Countries: Switzerland, United States
Subtask Leaders:
EMPA Empirical Tests: Heinrich Manz, EMPA, Switzerland
ERS Empirical Tests: Greg Maxwell, Iowa State University, United States

The objective of Project C is to collect empirical data for validating models of (1) thermal performance of windows, (2) illuminance calculations, (3) heating / cooling load of the room, (4) interaction between natural and electrical lighting and HVAC systems.

Left: EMPA Test Cells / Right: ERS Test Rooms


Subtask D: Mechanical Equipment and Controls Empirical Validation Tests

Subtask Lead Country: Germany
Subtask Leader: Clemens Felsmann, Dresden University of Technology, Germany

The objective of Project D is to specify a set of empirical validation test cases for chilled-water and hot-water hydronic components and systems, including tests for models of: chiller, boiler, hydronic network (piping, valves, etc.), the air/water heat exchanger (coil), and the entire system.

Selected Coil Control Strategies for the Test Cases


Subtask E: Double-Skin Building Empirical Validation Tests

Subtask Lead Country: Denmark
Subtask Leader: Per Heiselberg, Aalborg University, Denmark

The objective of Project E is to assess suitability and awareness of building energy analysis tools for predicting heat transfer, ventilation flow rates, cavity air and surface temperatures, solar protection effect, and interaction with building services systems in buildings with double facade.

Left: Double-Skin Fašade Test Facility (Aalborg University) / Right: Double-Skin Fašade Schematics for Heating and Cooling Modes


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International Energy Agency Solar Heating and Cooling Programme