TY - CONF
T1 - Modeling Ground Source Heat Pump Systems in a Building Energy Simulation Program (EnergyPlus)
T2 - IBPSA Building Simulation 2005
Y1 - 2005/08//
A1 - Daniel E. Fisher
A1 - Simon J. Rees
JF - IBPSA Building Simulation 2005
CY - Montreal, canada
ER -
TY - JOUR
T1 - A Nodal Model for Displacement Ventilation and Chilled Ceiling Systems in Office Spaces
JF - Building and Environment
Y1 - 2001/07//
SP - 753
EP - 762
A1 - Simon J. Rees
A1 - Philip Haves
KW - Chilled ceilings
KW - commercial buildings
KW - Displacement ventilation
KW - energy
KW - Heat Transfer
KW - Nodal model
KW - simulation
AB - A nodal model has been developed to represent room heat transfer in displacement ventilation and chilled ceiling systems. The model uses precalculated air flow rates to predict the air temperature distribution and the division of the cooling load between the ventilation air and the chilled ceiling. The air movements in the plumes and the rest of the room are represented separately using a network of ten air nodes. The values of the capacity rate parameters are calculated by solving the heat and mass balance equations for each node using measured temperatures as inputs. Correlations between parameter values for a range of cooling loads and supply air flow rates are presented.
VL - 36
UR - http://www.ibpsa.org/proceedings/BS1999/BS99_D-05.pdf
IS - 6
DO - 10.1016/S0360-1323(00)00067-6
ER -
TY - JOUR
T1 - Numerical Investigation of Transient Buoyant Flow in a Room with a Displacement Ventilation and Chilled Ceiling System
JF - International Journal of Heat and Mass Transfer
Y1 - 2001/08//
SP - 3067
EP - 3080
A1 - Simon J. Rees
A1 - James J. McGuirk
A1 - Philip Haves
AB - The air flow in the office ventilation system known as displacement ventilation is dominated by a gravity current from the inlet and buoyant plumes above internal heat sources. Calculations of the flow and heat transfer in a typical office room have been made for this type of ventilation system used in conjunction with chilled ceiling panels. These calculations have been made in parallel with full size test chamber experiments. It has been found that with higher values of internal load (45 and 72 W m−2 of floor area) the flow becomes quasi-periodic in nature. Complex lateral oscillations are seen in the plumes above the heat sources which impinge on the ceiling and induce significant recirculating flows in the room. The frequency spectra of the transient calculations show good agreement with those of the experimental results. Comparison is also made between calculated mean room air speeds and temperature profiles and measured values.
VL - 44
UR - http://www.sciencedirect.com/science/article/pii/S0017931000003483
IS - 16
DO - 10.1016/S0017-9310(00)00348-3
ER -
TY - JOUR
T1 - Comparison of Peak Load Predictions and Treatment of Solar Gains in the Admittance and Heat Balance Load Calculation Procedures
JF - Building Services Engineering Research & Technology
Y1 - 2000/
A1 - Simon J. Rees
A1 - Jeffrey D. Spitler
A1 - Michael J. Holmes
A1 - Philip Haves
AB - Calculation of design cooling loads is of critical concern to designers of HVAC systems. The work reported here has been carried out under a joint ASHRAE-CIBSE research project to compare design cooling calculation methods. Peak cooling loads predicted by the ASHRAE heat balance method are compared with those predicted by a number of implementations of the admittance method using different window models. The results presented show the general trends in overprediction or underprediction of peak load. Particular attention is given to different window modelling practices. The performance of the methods is explained in terms of some of the underlying assumptions in the window models, and by reference to specific inter-model comparisons.
VL - 21
UR - http://bse.sagepub.com/content/21/2/125
IS - 2
DO - 10.1177/014362440002100207
ER -
TY - JOUR
T1 - Qualitative Comparison of North American and U.K. Cooling Load Calculation Procedures
JF - International Journal of Heating, Ventilating, Air-Conditioning and Refrigeration Research
Y1 - 2000/
SP - 75
EP - 99
A1 - Simon J. Rees
A1 - Jeffrey D. Spitler
A1 - Morris G. Davies
A1 - Philip Haves
AB - A qualitative comparison is presented between three current North American and U.K. design cooling load calculation methods. The methods compared are the ASHRAE Heat Balance Method, the Radiant Time Series Method and the Admittance Method, used in the U.K. The methods are compared and contrasted in terms of their overall structure. In order to generate the values of the 24 hourly cooling loads, comparison was also made in terms of the processing of the input data and the solution of the equations required. Specific comparisons are made between the approximations used by the three calculation methods to model some of the principal heat transfer mechanisms. Conclusions are drawn regarding the ability of the simplified methods to correctly predict peak-cooling loads compared to the Heat Balance Method predictions. Comment is also made on the potential for developing similar approaches to cooling load calculation in the U.K. and North America in the future.
VL - 6
IS - 1
DO - 10.1080/10789669.2000.10391251
ER -
TY - Generic
T1 - A Nodal Model for Displacement Ventilation and Chilled Ceiling Systems in Office Spaces
T2 - Building Simulation ’99
Y1 - 1999/09//
A1 - Simon J. Rees
A1 - Philip Haves
AB - A nodal model has been developed to represent room heat transfer in displacement ventilation and chilled ceiling systems. The model uses precalculated air flow rates to predict the air temperature distribution and the division of the cooling load between the ventilation air and the chilled ceiling. The air movements in the plumes and the rest of the room are rep- resented separately using a network of ten air nodes. The values of the capacity rate parameters are calculated by solving the heat and mass balance equations for each node using measured temperatures as inputs. Correlations between parameter values for a range of cooling loads and supply air flow rates are presented.
JF - Building Simulation ’99
CY - Kyoto, Japan
UR - http://www.ibpsa.org/proceedings/BS1999/BS99_D-05.pdf
ER -
TY - JOUR
T1 - Comparison of North American and U.K. Cooling Load Calculation Procedures - Methodology
JF - ASHRAE Transactions
Y1 - 1998/
SP - 47
EP - 61
A1 - Jeffrey D. Spitler
A1 - Simon J. Rees
A1 - Philip Haves
AB - This paper describes the methodology used in a quanti- tative comparison between the current North American and United Kingdom cooling load calculation methods. Three calculation methods have been tested as part of a joint ASHRAE/CIBSE research project: the ASHRAE heat balance method and radiant time series method and the admittance method, used in the U.K. A companion paper (Rees et al.1998) describes the results of the study. The quantitative comparison is primarily organized as a parametric study—each building zone/weather day combination compared may be thought of as a combination of various parameters, e.g., exterior wall type, roof type, glazing area, etc. Specifically, this paper describes the overall organization of the study, the parameters and parameter levels that can be varied, and the tools developed to create input files, automate the load calculations, and extract the results. A brief descrip- tion of the cooling load calculation procedure implementa- tions is also given. The methodology presented and the tools described could also be used to make comparisons between other calculation methods.
VL - 104
IS - 2
ER -
TY - JOUR
T1 - Comparison of North American and U.K. Cooling Load Calculation Procedures - Results
JF - ASHRAE Transactions
Y1 - 1998/
SP - 36
EP - 46
A1 - Simon J. Rees
A1 - Jeffrey D. Spitler
A1 - Philip Haves
AB - Calculation of design cooling loads is of critical concern to designers of HVAC systems. The work reported here has been carried out under a joint ASHRAE/CIBSE research project to compare design cooling calculation methods. Three calculation methods have been tested, the ASHRAE heat balance method and radiant time series method, and the admit- tance method, used in the U.K. The results presented in this paper show the general trends in over/underprediction of peak load in the simplified methods compared to the heat balance method. The performance of the simplified methods is explained in terms of some of the underlying assumptions in the methods and by reference to specific examples.
VL - 104
IS - 2
ER -
TY - Generic
T1 - A Model of a Displacement Ventilation/Chilled Ceiling Cooling System Suitable for Annual Energy Simulation
T2 - Building Simulation '95
Y1 - 1995/08//
A1 - Simon J. Rees
A1 - Philip Haves
JF - Building Simulation '95
CY - Madison, WI
ER -
TY - Generic
T1 - Modelling and Simulation of Low Energy Cooling Systems
T2 - Tsinghua HVAC-95
Y1 - 1995/09//
A1 - Philip Haves
A1 - Simon J. Rees
A1 - Harrington, L.
JF - Tsinghua HVAC-95
CY - Bejing, China
ER -