Publications
82 results found
Fisk D, 1990, Bondi: mandarin muses, Physics World, Vol: 3, Pages: 55-56, ISSN: 0953-8585
Fisk DJ, 1985, Heat pumps in low energy housing ( UK)., Passive and low energy ecotechniques. Proc. 3rd PLEA conference, Mexico City, 1984, Pages: 855-863
Identifies the factors of special advantage to the domestic electric heat pump, and it is concluded that its viability in low energy housing is only secure against other technologies when some form of heat recovery is available. Heat pumps are already widely used in UK buildings where this is the case. Evaluations are described, taking place in the BRE Low Energy House Laboratories, to assess the improvements in heat pump performance obtainable with the use of solar energy, waste ventilation air and waste water as heat sources.-from Author
Fisk DJ, 1985, HEAT PUMPS IN LOW ENERGY HOUSING., Pages: 855-863
The heat pump is an important energy conservation option in providing low grade heat to building in moderate climates. The option has received very serious consideration for UK housing since the oil crisis. A technical analysis is described which identifies the factors of special advantage to the domestic electric heat pump, and it is concluded that its viability in low energy housing is only secure against other technologies when some form of heat recovery is available. Heat pumps are already widely used in UK buildings where this is the case, but innovative technologies have to be employed if the heat recovery principle is to be extended to housing. Evaluations are described, taking place in the BRE Low Energy House Laboratories, to assess the improvements in heat pump performance obtainable with the use of solar energy, waste ventilation air and waste water as heat sources.
Fisk DJ, Jebson DA, 1984, Influence of heat metering on district heating scheme consumption, Building Services Engineering Research & Technology, Vol: 5, Pages: 102-105, ISSN: 0143-6244
The effect on a UK district heating scheme's energy consumption of charging by flat rate and by evaporative radiator meters has been estimated. Data drawn from three sites gave a conservative estimate of a 12 per cent reduction in boilerhouse consumption. The average figure observed was 21 per cent, with a possible reduction at design conditions in average weekly load of around 20 per cent. The sites consisted of largely three and four bedroom accommodation. The applicability of the conclusions to other sites will of course depend on local site circumstances. © 1984, SAGE Publications. All rights reserved.
Fisk DJ, 1982, Decision making with uncertain energy costs, Building Services Engineering Research & Technology, Vol: 3, Pages: 1-3, ISSN: 0143-6244
In undertaking a full economic analysis of possible energy conserving measures for buildings, the estimation of the future cost of energy presents an apparent difficulty. It is argued that when the full conditions for an economic optimum are identified, this difficulty disappears for an important class of measures. For the class of remaining measures the optimality conditions enable the formulation of simple decision rules based on the relative costs of action now and remedial action later. These decision rules are found to highlight the importance of incorporating in the initial design the option of later easy remedial treatment. © 1982, SAGE Publications. All rights reserved.
Fisk DJ, 1981, Mean square error as a criterion for temperature control, Building Services Engineering Research & Technology, Vol: 2, Pages: 127-132, ISSN: 0143-6244
Existing thermal comfort criteria for temperature fluctuations about neutral are reviewed and compared with the requirements for control system design and building energy management. It is argued that the mean square error about the preferred temperature is both one of the easiest measures of error to compute in control design and relates to both the mean value of the Predicted Percentage Dissatisfied (PPD) and to the probability of occupants taking unprompted action to change their thermal environment. It is argued that the development of criteria suitable for design with optimal control theory also has implications for predicting the energy saving that can be associated with conventional thermal controls. An example is given to show how the mean square error criterion would predict a sinusoidally varying temperature about neutral of amplitude 2°C as equivalent to a sinusoidally varying temperature of amplitude 1°C whose mean was systematically 1.22°C below neutral. It is also shown that this criterion unlike simpler criteria predicts that this depression may not be much easier to realise in practice than a comparable depression under conditions of accurate temperature control. © 1981, SAGE Publications. All rights reserved.
Bloomfield DP, Fisk DJ, 1981, Room thermal response and control stability, Building Services Engineering Research & Technology, Vol: 2, Pages: 88-92, ISSN: 0143-6244
The importance of stability as a limit to good control is emphasised. A new first order model of the thermal response of a room is developed suitable for stability calculations. It emphasises the importance of separating radiant and convective paths in the block diagram of the heating system. © 1981, SAGE Publications. All rights reserved.
BLOOMFIELD DP, FISK DJ, 1981, THE OPTIMIZATION OF INTERMITTENT HEATING FOR VARIABLE EFFICIENCY HEATING-SYSTEMS, ENERGY AND BUILDINGS, Vol: 3, Pages: 295-301, ISSN: 0378-7788
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- Citations: 8
FISK DJ, 1978, ECONOMIC VALUE OF CONSERVING ENERGY, JOURNAL OF THE INSTITUTE OF FUEL, Vol: 51, Pages: 187-190
Fisk DJ, 1977, Microeconomics and the demand for space heating, Energy, Vol: 2, Pages: 391-405, ISSN: 0360-5442
The techniques of economic utility theory are combined with the technical equations for heat loss from a dwelling to give insight into the variation of consumer demand for space heating. A theoretical relationship is established between the performance of the occupied dwelling as the external temperature falls and the short-run income elasticity of energy demand. The analysis is applied to studies of U.K. heating practice in the 1950s and the implied indifference map for thermal comfort deduced. This indifference map is found to show a considerable economic propensity to absorb some of the potential savings from energy conservation measurements in higher internal temperatures. The effect found is sufficiently large to have consequences for future energy planning if it were still present in the U.K. domestic sector. The analysis highlights a number of points which should aid the interpretation of field experiments on domestic energy consumption. In particular, it is shown that unless great care is taken to separate out the technical and economic origins of internal temperature variation, the results of field studies on the effectiveness of conservation techniques may only be of shortlived value. © 1977.
Bloomfield DP, Fisk DJ, 1977, SEASONAL DOMESTIC BOILER EFFICIENCIES AND INTERMITTENT HEATING., Heat Vent Eng, Vol: 51, Pages: 6-8
The authors show that when intermittent heating is taken into account it appears that the degradation of the full load efficiency is considerably less than might have been supposed. Even in the worst case of gross boiler oversizing the seasonal efficiency does not fall below 60% in the intermittent heating pattern investigated. The results are used to draw some general conclusions concerning the correct design and sizing of boilers and heating systems for domestic use.
BLOOMFIELD DP, FISK DJ, 1977, OPTIMIZATION OF INTERMITTENT HEATING, BUILDING AND ENVIRONMENT, Vol: 12, Pages: 43-55, ISSN: 0360-1323
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- Citations: 28
Fisk DJ, 1976, ENERGY SAVING AND ″THE COMPOSITE TEN″ ., Batim Int Build Res Pract, Vol: 4
The author gives an analytical review of ten country monographs presented at the international symposium on energy conservation organized by The International Council for Building Research (CIB) working commission W67.
Bloomfield DP, Fisk DJ, 1975, STRATEGIC MODELS OF ENERGY USAGE.
A model which has been built to determine the main characteristics of energy consumption by building service during a period in which there may be considerable changes in the optimum choice of fuel and level of thermal insulation is discussed. It is intended to be used to simulate the qualitative pattern of energy consumption and enable experience to be gained of the long-run implications of certain energy use strategies. The general properties of energy consumption in a stock of buildings and their importance in the national energy picture is described, followed by a brief explanation of the model's construction and characteristic behavior.
FISK DJ, 1975, ATTENUATION OF L10 BY LONG BARRIERS, JOURNAL OF SOUND AND VIBRATION, Vol: 38, Pages: 305-316, ISSN: 0022-460X
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- Citations: 4
FISK DJ, 1973, STATISTICAL SAMPLING IN COMMUNITY NOISE MEASUREMENT, JOURNAL OF SOUND AND VIBRATION, Vol: 30, Pages: 221-236, ISSN: 0022-460X
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- Citations: 16
Fisk DJ, Salvidge AC, Sargent J, 1973, Data logging techniques for twenty-four hour noise measurement, Applied Acoustics, Vol: 6, Pages: 315-318, ISSN: 0003-682X
A data logging system is described which has been used successfully in monitoring traffic noise for 24 hours. This system is compact, quiet, and enables a rapid processing of field data. It produces detailed and accurate statistical analysis of noise, is portable, fully automatic and easy to set up. It has a low manpower requirement. It is intended to use this system in a forthcoming BRS social survey. © 1973.
FISK DJ, 1973, PROBLEM OF TRAFFIC NOISE, ROYAL SOCIETY OF HEALTH JOURNAL, Vol: 93, Pages: 289-&, ISSN: 0035-9130
Fisk D, Transport Energy Security. The Unseen Risk?
The decline in significance given to energy security in recent years can be associated with increasing trust in the self-balancing security of a global-trading economy. After the events of the first years of the 21st century, that framework now looks more problematic, at least for oil supplies. The underlying level of risk that characterised the oil market of the late 20th century has changed, exacerbated by the increasing inelasticity of demand for oil-based products in the transport sector of the world’s economies, which in its turn reflects the strategic dominance of transport within economies.The prudent course for the international community is to reduce the underlying causes of possible geopolitical constraints by making them more manageable through normal channels. One such constraint that is within every nation’s capability (and self-interest) to reduce is the upward drift in the price inelasticity of domestic oil consumption. This could involve increasing the ability to divert oil used within the domestic economy to transport. Yet for many industrial economies, this option has largely been exhausted and a more radical approach of opening up new energy vectors to supply the transport sector may be needed. Taking preventative action after a security event is generally more straightforward than taking precautionary action to ensure that it never happens. The latter course may only be successful through a coincidence with other interests. The current environment agenda is such a coincident interest with transport fuel security.
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