ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

Electronic Resource

Heat and power networks in process design. Part I: Criteria for placement of heat engines and heat pumps in process networks (1983)

Townsend, D. W. ; Linnhoff, Bodo

Hoboken, NJ : Wiley-Blackwell

AIChE Journal 29 (1983), S. 742-748

add to mindlist on the mindlist

Details

ISSN: 0001-1541

Keywords: Chemistry ; Chemical Engineering

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology

Notes: The general problem of heat and power integration in process networks is complex and to date not fully understood. The subject covers site combined heat and power, on-plant power generation, heat pumps, and refrigeration systems. This paper is the first of a two-part series and explains the concept of “appropriate” heat engine and heat pump placement in process networks based on a fundamental new insight. “Appropriate” placement takes advantage of integration opportunities with the remainder of the process and yields marginal efficiencies far greater than could be achieved through stand-alone heat engines. Conversely, “inappropriate” placement can never offer an advantage over stand-alone systems. Part II describes procedures for preliminary design, involving heat engine, and heat pump equipment selection and performance assessment.

Additional Material: 10 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/aic.690290508

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Heat and power networks in process design. Part II: Design procedure for equipment selection and process matching (1983)

Townsend, D. W. ; Linnhoff, Bodo

Hoboken, NJ : Wiley-Blackwell

AIChE Journal 29 (1983), S. 748-771

add to mindlist on the mindlist

Details

ISSN: 0001-1541

Keywords: Chemistry ; Chemical Engineering

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology

Notes: In Part I, criteria for heat engine and heat pump placement in chemical process networks were derived, based on the “temperature interval” (T.I) analysis of the heat exchanger network problem. Using these criteria, this paper gives a method for identifying the best outline design for any combined system of chemical process, heat engines, and heat pumps. The method eliminates inferior alternatives early, and positively leads on to the most appropriate solution. A graphical procedure based on the T.I. analysis forms the heart of the approach, and the calculations involved are simple enough to be carried out on, say, a programmable calculator. Application to a case study is demonstrated.Optimization methods based on this procedure are currently under research.

Additional Material: 27 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/aic.690290509

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Application of ARCTM thermokinetic data to the design of safety schemes for industrial reactors (1995)

Townsend, D. I. ; Ferguson, H. D. ; Kohlbrand, H. T.

New York, NY [u.a.] : Wiley-Blackwell

Process Safety Progress 14 (1995), S. 71-76

add to mindlist on the mindlist

Details

ISSN: 1066-8527

Keywords: Chemistry ; Chemical Engineering

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology

Notes: An ARCTM or similar experimental apparatus provides the transient temperature history of a chemical system under adiabatic conditions. The information obtained has several applications in the design and operation of industrial systems. Of particular interest is use of the adiabatic kinetic data to define “intervention strategies” based on “allowable response times” during an emergency.The time-temperature behavior of industrial reactors can be simulated over a limited temperature range by matching the “thermal inertia” (or φ-factor) of the experimental system to that of the full-scale system. This approach is applicable even for complex reactions, minimizes the extrapolation of data, and allows the use of simple models for data interpretation. Simulation results directly give the time available to respond in the event of a thermal runaway; this in turn defines the design requirements for an intervention scheme (e.g., emergency cooling, blow down, quench, etc.). The chosen intervention system can be tested experimentally prior to and/or during process start-up.

Additional Material: 1 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/prs.680140112

Permalink

	Location	Call Number	Expected	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Unknown

Palaeomagnetic refinement of the eruption ages of Holocene lava flows, and implications for the eruptive history of the Tongariro Volcanic Centre, New Zealand (2016)

Greve, A., Turner, G. M., Conway, C. E., Townsend, D. B., Gamble, J. A., Leonard, G. S.

Oxford University Press

In: Geophysical Journal International

add to mindlist on the mindlist

Details

Publication Date: 2016-09-14

Description: We present a detailed palaeomagnetic study from 35 sites on Holocene lava flows of the Tongariro Volcanic Centre, central North Island, New Zealand. Prior to the study the eruption ages of these flows were constrained to within a few thousand years by recently published high-precision 40 Ar/ 39 Ar geochronological data and tephrostratigraphic controls. Correlation of flow mean palaeomagnetic directions with a recently published continuous sediment record from Lake Mavora, Fiordland, allows us to reduce the age uncertainty to 300–500 yr in some cases. Our refined ages significantly improve the chronology of Holocene effusive eruptions of the volcanoes of the Tongariro Volcanic Centre. For instance, differences in the palaeomagnetic directions recorded by lavas from the voluminous Iwikau and Rangataua members suggest that individual effusive periods lasted up to thousands of years and that these bursts have been irregularly spaced over time. While over the last few millennia the effusive eruptive activity from Mt Ruapehu has been relatively quiet, the very young age (200–500 BP) of a Red Crater sourced flow suggests that effusive activity around Mt Tongariro lasted into the past few centuries. This adds an important hazard context to the historical record, which has otherwise comprised frequent relatively small, tephra producing, explosive eruptions without the production of lava flows.

Keywords: Geomagnetism, Rock Magnetism and Palaeomagnetism

Print ISSN: 0956-540X

Electronic ISSN: 1365-246X

Topics: Geosciences